JP2009046480A - Ophthalmic composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ophthalmic composition decreasing stimulative feeling generated in the coexistence of menthol and a surfactant even if the composition has low viscosity (viscosity at 20°C is <3.0 mPa s), high in safety, improving continuation of such coolness as giving comfortable feeling, and suitably usable in such conditions that the patient keratoconjunctival surface is more sensitive to external stimulation than ordinary. <P>SOLUTION: The ophthalmic composition contains dextran in addition to the menthol and the surfactant. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ophthalmic composition containing dextran, menthol and a surfactant.

  A refreshing agent typified by menthol for the purpose of imparting a refreshing feeling and refreshing feeling to the ophthalmic composition such as eye drops, eye wash, contact lens mounting liquid and contact lens care agent. Is blended. It is important to formulate a refreshing agent so that a comfortable and refreshing feeling can be imparted without unpleasant stimuli. A high-concentration refreshing agent that can give a refreshing feeling of moderate strength even when covered is necessary.

  Moreover, various surfactants are mix | blended with the ophthalmic composition. For example, nonionic surfactants are added to increase the water solubility of ingredients such as menthol, which have low water solubility, and cationic surfactants and amphoteric surfactants are added to increase preservative power. ing.

  On the other hand, in recent years, the patient's keratoconjunctiva has remained unconscious due to work under air-drying with an air conditioner, long-time wearing of contact lenses, long-time gaze on a personal computer or television (TV) screen, etc. It can often happen that the surface is more sensitive to external stimuli than usual. In such a state, when an eye drop that is usually used is used, even an eye drop containing a concentration of menthol, which is usually felt as a pleasant refreshing feeling, feels as an unpleasant stimulus, and menthol and When combined with a surfactant, the eye irritation tends to be promoted (in this specification, patients are not limited to those suffering from a specific eye disease, but an ophthalmic composition) The general person who uses things.)

  Conventionally, various methods for alleviating irritation of a cooling agent such as menthol blended in eye drops have been proposed. For example, a method of blending chlorobutanol and ethanol (Patent Document 1), a method of blending a local anesthetic such as chlorobutanol and lidocaine and a water-soluble polymer (Patent Document 2), and the like have been proposed. However, local anesthetics such as chlorobutanol have problems such as cytotoxicity depending on the added concentration and restrictions on the preparation. In addition, as a composition that has no irritation and maintains a refreshing feeling and a refreshing feeling over a long period of time, an ophthalmic preparation that contains a thickening agent together with a cooling component and has an absolute viscosity of 3 to 15 mPa · s at a temperature of 20 ° C. Has been proposed (Patent Document 3). However, when the viscosity is high, it may be difficult to handle due to filtration or the like during manufacture, or the ophthalmic composition having a lower viscosity may be preferred as a preference of the patient. Even at low viscosity (viscosity of less than 3.0 mPa · s at 20 ° C), it reduces irritation caused by menthol and surfactant, is highly safe, and the patient's keratoconjunctival surface is more sensitive to external stimuli than usual An ophthalmic composition that can be suitably used even in the state has not been found so far.

Therefore, menthol and surfactant coexist even at a low viscosity (viscosity of less than 3.0 mPa · s at 20 ° C.) in a state where the surface of the patient's keratoconjunctiva is more sensitive to external stimuli than usual. Therefore, it has been desired to develop an ophthalmic composition that reduces the feeling of irritation caused by this and maintains a refreshing feeling that is safe and comfortable.
JP 2006-176501 A JP 2003-183157 A JP 2002-97129 A

  The object of the present invention is to reduce the irritation caused by the coexistence of menthol and surfactant even at low viscosity (viscosity of less than 3.0 mPa · s at 20 ° C.), and feels high safety and comfort. An object of the present invention is to provide an ophthalmic composition that can be suitably used even in a state where the duration of the refreshing feeling is increased and the surface of the patient's keratoconjunctiva is more sensitive to external stimuli than usual.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors have used dextran in combination with menthol and a surfactant, and even with a low viscosity (viscosity at a temperature of 20 ° C. of less than 3.0 mPa · s), Reduces the sensation of irritation caused by the coexistence of menthol and surfactant, increases the duration of the refreshing feeling that is safe and comfortable, and makes the patient's keratoconjunctival surface more sensitive to external stimuli than usual The present inventors have found that an ophthalmic composition that can be suitably used in a state can be obtained, and have completed the present invention.

That is, the present invention is an ophthalmic composition listed in the following (1) to (19).
(1) An ophthalmic composition containing (A) dextran, (B) menthol, and (C) a surfactant.
(2) The ophthalmic composition according to (1), wherein the viscosity at 20 ° C. is less than 3.0 mPa · s.
(3) The ophthalmic composition according to (1) or (2), further comprising (D) one or more selected from the group consisting of aminoethylsulfonic acid and salts thereof.
(4) The ophthalmic composition according to any one of (1) to (3), further comprising (E) one or more selected from the group consisting of hyaluronic acid, alginic acid, and salts thereof.
(5) The ophthalmic composition according to any one of (1) to (4), wherein the blending ratio of (B) menthol is 0.005 to 0.1 (w / v)% and is an eye drop.
(6) The ophthalmic composition according to any one of (1) to (4), which is a contact lens mounting solution, an eye wash, or a contact lens care agent.
(7) The ophthalmic composition according to any one of (1) to (6), containing dextran in an amount of 0.0001 to 10 (w / v)% based on the entire composition.
(8) The ophthalmic composition according to any one of (1) to (7), wherein the dextran is a dextran having a weight average molecular weight of 20,000 to 1,000,000.
(9) The ophthalmic composition according to any one of (1) to (8), wherein the dextran is dextran 70.
(10) The ophthalmic composition according to any one of (1) to (9), wherein the menthol is l-menthol.
(11) The ophthalmic composition according to any one of (1) to (10), wherein the surfactant is contained at 0.0001 to 10 (w / v)% with respect to the entire composition.
(12) The ophthalmic composition according to (11), wherein the surfactant is at least one selected from the group consisting of a nonionic surfactant, a cationic surfactant, and an amphoteric surfactant.
(13) The ophthalmic composition according to (12), which contains a nonionic surfactant at 0.001 to 1 (w / v)% based on the entire composition.
(14) The ophthalmic composition according to (12) or (13), wherein the nonionic surfactant is at least one selected from the group consisting of polysorbate 80, polyoxyethylene hydrogenated castor oil 60 and poloxamer 407. .
(15) The ophthalmic composition according to (12), which contains a cationic surfactant at 0.0001 to 0.1 (w / v)% with respect to the entire composition.
(16) The ophthalmic composition according to (12) or (15), wherein the cationic surfactant is at least one selected from the group consisting of benzalkonium chloride, benzethonium chloride, chlorhexidine gluconate and chlorhexidine hydrochloride. object.
(17) The ophthalmic composition according to (12), wherein the amphoteric surfactant is contained in an amount of 0.0001 to 0.1 (w / v)% based on the entire composition.
(18) The ophthalmic composition according to (12) or (17), wherein the amphoteric surfactant is alkyldiaminoethylglycine hydrochloride.
(19) The ophthalmic composition according to any one of (1) to (18), further comprising one or more selected from the group consisting of ethylenediamineacetic acid derivatives or salts thereof.

The present inventors have also found that the use of dextran provides an effect of reducing eye irritation caused by the ethylenediamineacetic acid derivative and / or its salt. Accordingly, the present invention also provides ophthalmic compositions listed in the following (20) to (21).
(20) containing (A) dextran and (F) one or more selected from the group consisting of ethylenediamineacetic acid derivatives and salts thereof, and consisting of (F) ethylenediamineacetic acid derivatives and salts thereof with respect to the entire composition An ophthalmic composition containing 0.005 to 0.04% of one or more selected from the group.
(21) With respect to 1 part by weight of the total amount of (A) dextran, (F) one or more selected from the group consisting of ethylenediamineacetic acid derivatives and salts thereof is contained in a proportion of 0.01 to 0.04 parts by weight as a total amount An ophthalmic composition.
In the present specification, unless otherwise specified,% means w / v%.
In the present specification, the contact lens includes all types of contact lenses such as hard, soft, oxygen-permeable hard, and color.

The ophthalmic composition of the present invention contains dextran in addition to menthol and surfactant, so that menthol and surfactant coexist even at low viscosity (viscosity of less than 3.0 mPa · s at 20 ° C.). Therefore, it is possible to provide an ophthalmic composition that reduces the feeling of irritation caused by the above, and has a refreshing feeling that is high in safety and comfortable. The effect of the present invention can be more suitably exhibited in a state where the patient's keratoconjunctival surface is more sensitive to external stimuli than usual.
In yet another embodiment, the ophthalmic composition of the present invention contains an ethylenediamineacetic acid derivative and / or a salt thereof together with dextran, thereby effecting eye irritation caused by the ethylenediamineacetic acid derivative and / or a salt thereof. Can be reduced.

  As the dextran used in the ophthalmic composition of the present invention (hereinafter sometimes simply referred to as the component (A)), a commercially available product can be used, for example, a polymer dextran produced by Leuconostoc mesenteroides is partially used. The product obtained by hydrolyzing, fractionating and purifying can be used. As dextran, dextran having various molecular weights can be used. In order to further enhance the effects of the present invention, dextran having a weight average molecular weight of 20,000 or more is preferable, dextran having a weight average molecular weight of 30,000 or more is more preferable, Dextran having an average molecular weight of 50,000 or more is particularly preferable. The upper limit of the weight average molecular weight of dextran is not particularly limited as long as the effect of the present application can be achieved, but dextran having a weight average molecular weight of 1,000,000 or less is preferable, and dextran having a weight average molecular weight of 100,000 or less is more preferable. Examples of preferable dextran include one or more selected from the group consisting of dextran 70 (weight average molecular weight of about 70,000) and dextran 40 (weight average molecular weight of about 40000), and dextran 70 is particularly preferable.

  In the present invention, the content of dextran in the ophthalmic composition is not particularly limited as long as the effect of the present application can be achieved. However, the total amount of dextran is generally 0.0001 to 10%, usually 0.00. 001 to 5%, preferably 0.003 to 3%, more preferably 0.01 to 2%, still more preferably 0.05 to 1%. If the content of dextran is too small, the effect of reducing irritation and a pleasant refreshing feeling cannot be expected, while if it is too much, there are problems such as generation of stickiness and difficulty in filtration in production.

  As menthol used in the ophthalmic composition of the present invention (hereinafter sometimes simply referred to as the component (B)), l-menthol, d-menthol, dl-menthol and the like can be used, and in particular, l-menthol. Is preferred. Moreover, menthol can also be mix | blended with a composition in the state contained in essential oil, Preferably, peppermint oil and mint oil are used. One or two or more selected from the group consisting of these menthols and essential oils containing menthol can also be used. In addition, when mix | blending essential oil with a composition, content of menthol is computed as content of the menthol itself which exists in essential oil.

  In the present invention, the content of menthol in the ophthalmic composition is generally 0.0005 to 0.1%, preferably 0.005 to 0.05%, more preferably as the total amount of menthol. 0.005 to 0.03%, more preferably 0.01 to 0.02%.

  More specifically, when the ophthalmic composition is an eye drop, the content of menthol in the composition is usually 0.005 to 0.1%, preferably 0. 005 to 0.05%, more preferably 0.005 to 0.03%, and still more preferably 0.01 to 0.02%. When the ophthalmic composition is a contact lens mounting solution or a contact lens care agent, the content of menthol in the composition is usually 0.0001 to 0.1%, preferably as a total amount of menthol, with respect to the entire composition. Is 0.0005 to 0.03%, more preferably 0.001 to 0.02%, still more preferably 0.001 to 0.01%. When the ophthalmic composition is an eye wash, it is usually 0.001 to 0.1%, preferably 0.005 to 0.05%, more preferably 0.005 to 0.03%, and still more preferably 0.01 to 0. 0.02%. When the ophthalmic composition is an eye drop, if the content of menthol is less than 0.005%, there is little problem due to the absence of irritation caused by menthol and surfactant, and more than 0.1%. And the irritation is too strong, and irritation caused by menthol and surfactant may not be reduced. Further, when the ophthalmic composition is a contact lens mounting solution, an eye wash, or a contact lens care agent, menthol is more likely to feel irritation by menthol and surfactant than eye drops. If so, the effects of the present invention can be further improved. In addition, when mix | blending an essential oil with a composition, content of menthol is computed as menthol itself content which exists in essential oil.

  As the surfactant used in the ophthalmic composition of the present invention (hereinafter sometimes simply referred to as the component (C)), those usually used by those skilled in the art for ophthalmic compositions can be used. One or more selected from the group consisting of ionic surfactants, cationic surfactants and amphoteric surfactants are preferred.

  In the ophthalmic composition of the present invention, the content of the surfactant varies depending on the type of the surfactant and the like, and thus cannot be defined unconditionally. However, the total amount of the surfactant is usually 0.0001 to 10 based on the entire composition. %, Preferably 0.001 to 5%, more preferably 0.005 to 1%, particularly preferably 0.05 to 0.5%.

  As the nonionic surfactant, those usually used by those skilled in the art for ophthalmic compositions can be used. For example, polyoxyethylene (hereinafter also referred to as POE) -polyoxypropylene (hereinafter also referred to as POP). Block copolymers (eg, poloxamer 407, poloxamer 235, poloxamer 188, etc.); POE-POP block copolymer adducts of ethylenediamine such as poloxamine; monolauric acid POE (20) sorbitan (polysorbate 20), monooleic acid POE (20 ) POE sorbitan fatty acid esters such as sorbitan (polysorbate 80), POE sorbitan monostearate (polysorbate 60), POE sorbitan tristearate (polysorbate 65); POE hydrogenated castor oil 5, POE hydrogenated castor oil 10, POE hydrogenated castor oil 20, PO POE hydrogenated castor oil such as hydrogenated castor oil 40, POE hydrogenated castor oil 60, POE hydrogenated castor oil 60, POE hydrogenated castor oil 100; POE alkyl ethers such as POE (9) lauryl ether; POE (20) POP (4 ) POE / POP alkyl ethers such as cetyl ether; POE alkylphenyl ethers such as POE (10) nonylphenyl ether. These nonionic surfactants can be used alone or in combination of two or more. The numbers in parentheses indicate the number of added moles.

  Preferred nonionic surfactants are one or more selected from POE-POP block copolymers, POE sorbitan fatty acid esters and POE hydrogenated castor oils, particularly preferably because of the effect of reducing irritation caused by dextran. Poloxamer 407, polysorbate 80, polyoxyethylene hydrogenated castor oil 60.

  In the ophthalmic composition of the present invention, the content of the nonionic surfactant varies depending on the kind of the nonionic surfactant and the like, and thus cannot be defined unconditionally. However, the total amount of the nonionic surfactant is the entire composition. Is usually 0.001 to 1%, preferably 0.005 to 0.8%, more preferably 0.01 to 0.5%, and particularly preferably 0.05 to 0.3%.

  As the cationic surfactant, those usually available to those skilled in the art for ophthalmic compositions can be used. Alkylamine salts; alkyl quaternary ammonium salts (for example, benzalkonium chloride, benzethonium chloride, etc.); Polydronium chloride; Glokill (for example, trade name, Glokill PQ, manufactured by Rhodia), polydiallyldimethylammonium chloride; poly [oxyethylene (dimethyliminio) ethylene- (dimethyliminio) ethylene dichloride]; polyethylene polyamine; dimethylamine epichlorohydrin Polycondensates (for example, trade name, Busan 1157, manufactured by Bachman Laboratories); alkylpyridinium salts (for example, cetylpyridinium chloride, cetylpyridinium bromide, etc.); chlorhexidine salts (for example, chlorhexidine gluconate, chlorinated hydrochloride) Lorhexidine, etc.). These cationic surfactants can be used alone or in combination of two or more.

  Preferred cationic surfactants are alkyl quaternary ammonium salts and chlorhexidine salts, and more preferably benzalkonium chloride, benzethonium chloride, chlorhexidine gluconate, and hydrochloric acid from the viewpoint that the effect of reducing irritation by dextran is easily achieved. Chlorhexidine, particularly preferably benzalkonium chloride and chlorhexidine gluconate.

  In the ophthalmic composition of the present invention, the content of the cationic surfactant varies depending on the type of the cationic surfactant and the like, and thus cannot be defined unconditionally. However, as the total amount of the cationic surfactant, Is usually 0.0001 to 0.1%, preferably 0.0005 to 0.08%, more preferably 0.001 to 0.05%, and particularly preferably 0.002 to 0.03%.

  As the amphoteric surfactant, those that can be used by those skilled in the art for ophthalmic compositions can be used, and examples thereof include glycine-type amphoteric surfactants such as alkylpolyaminoethylglycine and / or a salt thereof. The salt of alkylpolyaminoethylglycine is not particularly limited as long as it is physiologically acceptable. Examples of such salts include hydrochloride, chloride, sulfate and the like. Of these, alkyldiaminoethylglycine and / or a salt thereof are preferable, and alkyldiaminoethylglycine hydrochloride is particularly preferable, since the effect of reducing the stimulation by dextran is easily achieved. Amphoteric surfactants can be used alone or in combination of two or more.

  In the ophthalmic composition of the present invention, the content of the amphoteric surfactant varies depending on the type of amphoteric surfactant and the like, and thus cannot be defined unconditionally. However, the total amount of the amphoteric surfactant is generally 0. It is 0001 to 0.1%, preferably 0.0005 to 0.05%, more preferably 0.001 to 0.02%.

  Further, the weight ratio of the total amount of dextran and the total amount of menthol and surfactant is not particularly limited as long as the stimulation-reducing effect by dextran can be exerted, but preferably menthol and the interface with respect to 1 part by weight of the total amount of dextran. The total amount of the activator is 0.0001 to 10 parts by weight, more preferably 0.0005 to 5 parts by weight, and particularly preferably 0.001 to 1 part by weight.

  The ophthalmic composition of the present invention is particularly useful in the case of an ophthalmic composition having a low viscosity because irritation caused by menthol and a surfactant is likely to occur particularly at a low viscosity. Specifically, the viscosity at 20 ° C. is preferably 1 mPa · s or more and less than 3.0 mPa · s, more preferably 1 mPa · s or more and 2.5 mPa · s or less, and more preferably 1 mPa · s or more. 2.0 mPa · s or less is particularly preferable.

  In order to further enhance the effects of the present invention, the ophthalmic composition of the present invention preferably further contains one or more selected from the group consisting of aminoethylsulfonic acid and salts thereof. The salt of aminoethylsulfonic acid is not particularly limited as long as it is physiologically acceptable. Examples of such salts include alkali metal salts and alkaline earth metal salts. Preferred salts are sodium salts, potassium salts, and calcium salts. Particularly preferred is aminoethylsulfonic acid.

  In the ophthalmic composition of the present invention, the content of one or more selected from the group consisting of aminoethylsulfonic acid and a salt thereof is generally 0.001 to 3%, preferably 0, based on the entire composition as a total amount. 0.01 to 1%. Specifically, when the ophthalmic composition is an eye drop, a contact lens mounting solution, or a contact lens care agent, it is preferably 0.1 to 1%, more preferably 0.2 to 1%. When the cosmetic composition is an eye wash, it is preferably 0.01 to 0.1%, more preferably 0.02 to 0.1%.

  In order to further enhance the effects of the present invention, the ophthalmic composition of the present invention further includes at least one selected from hyaluronic acid, alginic acid, and salts thereof (hereinafter sometimes simply referred to as acidic polysaccharides). .) Is preferably blended. Examples of the salt of hyaluronic acid or alginic acid include alkali metal salts, and preferred salts are sodium salt and potassium salt. As the acidic polysaccharide used in the present invention, hyaluronic acid, sodium hyaluronate, alginic acid, and sodium alginate are particularly preferable. In addition, an ophthalmic composition containing an acidic polysaccharide is difficult to blink when applied to the eye (for example, when instilled, washed with eyes, or when a lens treated with a contact lens care agent is mounted). Although it may be felt, the ophthalmic composition of the present invention containing an acidic polysaccharide has an effect of reducing such difficulty in blinking.

  Furthermore, by adding an acidic polysaccharide to the ophthalmic composition of the present invention, it is possible to exert a significantly high preventive and / or therapeutic effect on eye contact. Therefore, the ophthalmic composition of the present invention containing an acidic polysaccharide can be used particularly advantageously for a patient (for example, a dry eye patient) having a dry eye condition. In order to obtain a high preventive and / or therapeutic effect on eye contact, preferably, hyaluronic acid, sodium hyaluronate, alginic acid, sodium alginate is used as the acidic polysaccharide, more preferably hyaluronic acid, hyaluronic acid Sodium is used, particularly preferably sodium hyaluronate.

  In the ophthalmic composition of the present invention, the content of acidic polysaccharide is generally 0.0001 to 5%, preferably 0.001 to 1%, based on the total composition, as a total amount. Specifically, when the ophthalmic composition is an eye drop, a contact lens mounting solution, or a contact lens care agent, it is preferably 0.01 to 0.4%, more preferably 0.01 to 0.1%. When the ophthalmic composition is an eye wash, it is preferably 0.001 to 0.1%, more preferably 0.001 to 0.05%.

In order to further enhance the effects of the present invention, the ophthalmic composition of the present invention preferably further contains a buffer. Examples of the buffer used in the present invention include borate buffer, phosphate buffer, carbonate buffer, citrate buffer, acetate buffer, HEPES buffer, and MOPS buffer. More specifically, boric acid, borax, sodium borate, potassium tetraborate, potassium metaborate, phosphoric acid, sodium hydrogen phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, carbonic acid, sodium hydrogen carbonate, Examples thereof include compounds such as sodium carbonate, citric acid, sodium citrate, potassium citrate, acetic acid, sodium acetate, HEPES, and MOPS, and combinations of two or more compounds selected from these groups.
Preferred buffering agents are borate buffer and phosphate buffer.
A particularly preferred buffer is a borate buffer.

  In the ophthalmic composition of the present invention, the content of the buffering agent varies depending on the type of the buffering agent and cannot be defined unconditionally. %, Preferably 0.001 to 7%, more preferably 0.01 to 5%, particularly preferably 0.05 to 3%.

  In order to further enhance the effects of the present invention, it is preferable to add a thickening agent to the ophthalmic composition of the present invention. As the thickening agent, those that can be usually used by those skilled in the art for ophthalmic compositions can be used, and examples thereof include cellulose polymers, vinyl polymers, starch polymers, gelatins and the like. As the thickening agent used in the present invention, cellulose-based polymers and vinyl-based polymers are preferable, and water-soluble ones are particularly preferable. Examples of the cellulose polymer include alkyl celluloses such as methyl cellulose (such as methyl cellulose and methyl ethyl cellulose) and ethyl cellulose (such as ethyl cellulose, ethyl methyl cellulose, and ethyl propyl cellulose); hydroxyethyl cellulose (hydroxyethyl cellulose, hydroxyethyl methyl cellulose, hydroxy) Ethylethylcellulose, hydroxyethylhydroxypropylcellulose, etc.), hydroxypropylcelluloses (hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxypropylethylcellulose, etc.), carboxyalkylcelluloses (carboxymethylcellulose, carboxymethylmethylcellulose, carboxymethylethylcellulose) Or hydroxyalkyl celluloses such as salts thereof (such as sodium salts): Examples of vinyl polymers include vinyl pyrrolidone polymers such as polyvinyl pyrrolidone; vinyl alcohol polymers such as polyvinyl alcohol; polyvinyl methyl ether Examples of the starch-based polymer such as carboxyvinyl polymer include starch (soluble), and examples of gelatin include gelatin and gelatin hydrolyzate. These thickening agents can be used alone or in combination of two or more.

  In order to achieve the effects of the present invention, preferred thickening agents are hydroxyethyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, polyvinyl pyrrolidone, and polyvinyl alcohol, and particularly preferred are hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and polyvinyl alcohol.

  In the ophthalmic composition of the present invention, the content of the thickening agent varies depending on the molecular weight and type of the thickening agent and thus cannot be defined unconditionally. The viscosity of the composition of the present invention is 1 mPa at a temperature of 20 ° C. S or more and less than 3.0 mPa · s, preferably 1 mPa · s or more and 2.5 mPa · s or less, more preferably 1 mPa · s or more and 2.0 mPa · s or less Can be appropriately selected. For example, the total amount of the thickening agent is usually 0.001 to 5%, preferably 0.005 to 3%, more preferably 0.01 to 1%, and particularly preferably 0. It mix | blends so that it may become 01-0.3%, and it adjusts so that the viscosity of a composition may become the above-mentioned range.

  The ophthalmic composition of the present invention can contain a cooling component other than menthol because the irritation caused by menthol and surfactant is suitably reduced. Examples of the refreshing component used in the present invention include camphor, borneol, geraniol, ryuunou, fennel oil, bergamot oil, eucalyptus oil, rose oil and the like, and these may be any of d-form, l-form or dl-form. In particular, d-camphor, dl-camphor, d-borneol, geranyl, bergamot oil, and eucalyptus oil are preferable from the viewpoint that the effect of reducing irritation by dextran is easily achieved. These refreshing agents can be used alone or in combination of two or more.

  In the ophthalmic composition of the present invention, the content of the refreshing agent other than menthol is usually 0.0001 to 0.2%, preferably 0, as the total amount of the refreshing agent other than menthol. .0005 to 0.1%, more preferably 0.001 to 0.05%, and particularly preferably 0.001 to 0.01%.

  The ophthalmic composition of the present invention can further contain an ethylenediamineacetic acid derivative or a salt thereof for stabilizing components to be blended in the ophthalmic composition. Examples of the ethylenediamineacetic acid derivative or salt thereof used in the present invention include edetic acid (ethylenediaminetetraacetic acid, EDTA), ethylenediaminediacetic acid (EDDA), diethylenetriaminepentaacetic acid (DTPA), N- (2-hydroxyethyl) ethylenediaminetriacetic acid. (HEDTA) etc. can be illustrated. These may be used alone or in combination of two or more, and may be used as a pharmacologically or physiologically acceptable salt (for example, sodium ethylenediaminetetraacetate). Among them, ethylenediaminetetraacetic acid or a salt thereof is preferable, for example, ethylenediaminetetraacetic acid disodium, ethylenediaminetetraacetic acid disodium dihydrate (hereinafter also referred to as sodium edetate).

  The content of the ethylenediamineacetic acid derivative or salt thereof in the ophthalmic composition of the present invention varies depending on the molecular weight, type, etc., and thus cannot be specified unconditionally. 0.0005-2%, preferably 0.0001-1%, more preferably 0.0005-0.5%, still more preferably 0.001-0.3%, particularly preferably 0.002-0.1%. It is.

  In addition, as shown in Test Example 6 to be described later, it has been clarified by the present inventors that the ethylenediamineacetic acid derivative and its salt give eyes irritation. According to the present invention, eye irritation caused by the ethylenediamineacetic acid derivative and its salt can be effectively reduced by dextran. In this embodiment of the present invention, the ethylenediamineacetic acid derivative and the salt thereof are preferably ethylenediaminetetraacetic acid or a salt thereof, such as disodium ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetic acid dihydrate.

  In order to obtain the stimulus-reducing effect of dextran against the stimulus caused by the ethylenediamineacetic acid derivative and its salt, the content of the ethylenediamineacetic acid derivative and its salt in the ophthalmic composition of the present invention is usually set as the total amount. It is necessary to set it as 0.005-0.04% with respect to the whole thing, Preferably 0.01-0.03%. In addition, in order to obtain the stimulus-reducing effect of dextran against the stimulus caused by the ethylenediamineacetic acid derivative and its salt, the total amount of ethylenediaminetetraacetic acid and its salt is usually set to 0. It is necessary to make it 01 to 0.04 parts by weight, preferably 0.01 to 0.03 parts by weight.

  The eye drops of the present invention further include inorganic salts; saccharides; decongestants, eye muscle modifiers, anti-inflammatory agents and / or astringents, antihistamines and / or antiallergic agents, vitamins, amino acids, antibacterial agents, etc. Active ingredients: Buffering agents, isotonic agents, chelating agents, stabilizers, pH adjusters, preservatives and the like can be added as appropriate. When the active ingredient is blended, the usage amount of the active ingredient is selected from the range of, for example, 0.0001 to 30%, preferably 0.0005 to 10%, more preferably about 0.001 to 5%. Can do.

  Examples of inorganic salts include sodium chloride, potassium chloride, calcium chloride, sodium hydrogen carbonate, sodium carbonate, dry sodium carbonate, magnesium sulfate, sodium hydrogen phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, and the like. . These inorganic salts may be used as a buffer component or an isotonic agent component.

  Examples of the saccharide include glucose, lactose, fructose, mannitol, xylitol, sorbitol and the like. These saccharides may be used as isotonic agent components.

  Examples of the decongestant include epinephrine, epinephrine hydrochloride, ephedrine hydrochloride, tetrahydrozoline hydrochloride, naphazoline hydrochloride, naphazoline nitrate, phenylephrine hydrochloride, methylephedrine hydrochloride, and the like.

  Examples of the eye muscle modifier include neostigmine methyl sulfate.

  Anti-inflammatory and / or astringents include epsilon aminocaproic acid, allantoin, berberine chloride, berberine sulfate, sodium azulenesulfonate, dipotassium glycyrrhizinate, zinc sulfate, zinc lactate, lysozyme chloride, planoprofen, diclofenac, lomefloxane, norfloxacin Ofloxacin and the like.

  Examples of the antihistamine and / or antiallergic agent include diphenhydramine hydrochloride, chlorpheniramine maleate, cromoglycate sodium, amlexanox, ibudilast, suplatast tosylate, pemirolast, tranilast, ketotifen fumarate and the like.

  Examples of vitamins include flavin adenine dinucleotide sodium, cyanocobalamin, retinol acetate, retinol palmitate, pyridoxine hydrochloride, panthenol, calcium pantothenate, sodium pantothenate, tocopherol acetate and the like.

  Examples of amino acids include potassium L-aspartate, magnesium L-aspartate, magnesium / potassium L-aspartate (equal mixture), sodium chondroitin sulfate and the like.

  Antibacterial agents include sulfamethoxazole, sulfamethoxazole sodium, sulfisoxazole, sulfisomidine sodium, ofloxacin, norfloxacin and the like.

  In addition, local anesthetics (oxybuprocaine, lidocaine, lidocaine hydrochloride, etc.), myopia treatment / preventive agents (tropicamide, cyclopentrate, endothelin, etc.), intraocular pressure-lowering agents (pilocarpine hydrochloride, Various types such as isopropyl unoprostone, distigmine bromide, carbacomal, carteolol hydrochloride, befnolol hydrochloride, timolol maleate, dipivefrin hydrochloride, ecothiopart iodide, diclofenamide, etc.), soothing agents (benzalkonium chloride, procaine hydrochloride, etc.) The active ingredient may be used at a concentration that does not cause a safety problem.

  Examples of the buffer include those described above, for example, tartaric acid buffer, epsilon aminocaproic acid, aspartate and the like.

  Examples of the isotonic agent include sugars (sorbitol, glucose, mannitol, etc.), polyhydric alcohols (glycerin, polyethylene glycol, propylene glycol, etc.), inorganic salts (sodium chloride, potassium chloride, etc.) and the like.

  Examples of the chelating agent include nitrilotriacetic acid or a salt thereof, sodium hexametaphosphate, citric acid and the like.

  Examples of the stabilizer include sodium bisulfite.

  Examples of pH regulators include bases (alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, alkali metal carbonates or hydrogen carbonates such as sodium carbonate), acids (organic acids such as acetic acid and citric acid, hydrochloric acid) And inorganic acids such as phosphoric acid).

  Examples of the preservatives include those described above, for example, sorbic acid, potassium sorbate, paraoxybenzoic acid esters (methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate, butyl paraoxybenzoate, etc.), chlorobutanol, poly And hexamethylene biguanide.

  The pH of the ophthalmic composition of the present invention is usually 4 to 9 for the purpose of effectively reducing irritation caused by menthol and surfactant, and for the purpose of effectively reducing irritation caused by ethylenediamineacetic acid derivatives and salts thereof. , Preferably 5 to 8.5, more preferably 5.5 to 7.5. The osmotic pressure is usually 150 to 450 mOsm for the purpose of effectively reducing irritation caused by menthol and surfactant, and for the purpose of effectively reducing irritation caused by the ethylenediamineacetic acid derivative and its salt. The osmotic pressure ratio is usually 0.6 to 2.0, preferably 0.7 to 1.7, and more preferably 0.8 to 1.5.

  In addition, the use of the ophthalmic composition of the present invention is not specified as long as it uses the effects of the invention, and can be used in various fields such as pharmaceuticals, quasi drugs, and miscellaneous goods. Examples of the ophthalmic composition include eye drops (including eye drops that can be used even while wearing contact lenses, also referred to as eye drops and eye drops), eye wash (when wearing contact lenses). Can also be used, and is also referred to as eyewash, eyewash, eye ointment, contact lens mounting solution, contact lens care agent (cleaning solution, preservative solution, disinfectant solution, disinfectant solution) Preferred eye drops, contact lens mounting liquid, eye wash or contact lens care agent, and particularly preferably eye drops, contact lens mounting liquid, eye wash. .

  The ophthalmic composition of the present invention contains dextran in addition to menthol and surfactant, so that menthol and surfactant coexist even at low viscosity (viscosity of less than 3.0 mPa · s at 20 ° C.). Ophthalmology that is suitable for use when the surface of the patient's keratoconjunctiva is more sensitive to external stimuli than usual. A composition can be provided. In another embodiment, the ophthalmic composition of the present invention contains dextran in addition to the ethylenediamineacetic acid derivative and its salt, thereby reducing the eye irritation caused by the ethylenediamineacetic acid derivative and its salt. be able to. Therefore, in addition to eye drops, when the composition is an eye wash, the effects of the present invention can be achieved for a composition that enters the eye by eye washing. In addition, when the composition is a contact lens mounting solution or a contact lens care agent, the effect of the present invention is also exerted on a composition that enters the eye through the lens when the contact lens is mounted on the eye. In addition, when the patient's keratoconjunctival surface is more sensitive to external stimuli than usual, symptoms such as conjunctival hyperemia, eye fatigue, itchy eyes, eye movements, and blurred eyes often develop. Therefore, the ophthalmic composition of the present application is suitably applied to patients who have conjunctival hyperemia, eye fatigue, itchy eyes, eye dryness, blurred eyes, and the like. In particular, the ophthalmic composition of the present invention containing an acidic polysaccharide can be suitably used for a patient who has a dry eye.

  The ophthalmic composition of the present invention can be prepared by a conventional method. For example, in the case of eye drops, contact lens mounting solution, eye wash or contact lens care agent, the components are dissolved or suspended in distilled water, adjusted to a predetermined pH and osmotic pressure, and prepared by filtration sterilization treatment. it can.

Hereinafter, the present invention will be described in detail based on test examples and examples, but the present invention is not limited thereto.
Viscosity measurement method Viscosity measurement method is a method using a conical one-plate rotational viscometer (general test method, 45 viscosity measurement method, second method rotational viscometer method described in the 14th revision Japanese Pharmacopoeia, "(3 ) The method described in the section “Cone-plate rotational viscometer”. Specifically, the measurement was performed using a commercially available cone-plate type rotational viscometer and an appropriately selected rotor.

  In measuring viscosity, commercially available viscometers such as E-type viscometers (manufactured by TOKIMEC, sold by Toki Sangyo (Japan)), Synchronic PC type (Brookfield, USA), Ferranti Shirley (Feranti, UK), Rot Bisco R (Haake, Germany), IGK Hischer Rheometer (Ishida Giken, Japan), Shimadzu Rheometer R (Shimadzu, Japan), Weissenberg Greogoniometer (Sangamo, UK), Mechanical Spectro Meters (rheometrics, rice), etc. can be used. Then, by appropriately selecting these commercially available viscometers and rotors, by appropriately adjusting the petroleum-based hydrocarbon oil (Newtonian fluid) defined by JIS Z8809 as a calibration standard solution for each test sample measurement, The viscosity at 20 ° C. can be measured.

Specifically, a sample is put in a gap of an angle α between a cone and a flat disc, and the cone or the flat disc is rotated at a constant angular velocity ω or torque T, and the flat disc when a steady state is reached. Alternatively, the torque or angular velocity received by the cone was measured, and the viscosity was measured by calculating the viscosity η of the sample by the following equation.
η = 100 × (3α / 2πR ³ ) · (T / ω)
η: Viscosity of sample (mPa · s) (Pa · s = 10 ³ mPa · s)
α: Angle between a flat disk and a cone (rad)
π: Circumference ratio R: Conical radius (cm)
T: Torque acting on a flat disk or a conical surface (10 ⁻⁷ N · m)
ω: angular velocity (rad / s)

The viscosity of each example and each comparative example in this test is a TVE-20L type viscometer cone plate type (manufactured by TOKIMEC, Toki Sangyo (Japan)), which is a type of E-type viscometer. Measurement was performed under the following measurement conditions. In addition, the viscosity in this invention is also called absolute viscosity.
Measurement condition:
Full standard cone rotor attached to TVE-20L viscometer cone plate type (corresponds to cone 1 in FIG. 1) (angle between flat disc and cone = 1 ° 34 ′, radius (R) = 2.4 cm) It is rotated by a motor through a spring of scale torque 673.7 × 10 ⁻⁷ Nm. During measurement, the viscometer is installed so that the rotation axis is perpendicular to the horizontal plane.
1 ml of the test sample is placed on a predetermined position (flat disk) of the cone rotor, and is left until the temperature reaches 20 ° C. Next, the apparatus is rotated at a rotational speed corresponding to the viscosity of the test sample, and the displayed viscosity is read. In order to obtain high-precision measurement results, before measurement of the test sample, petroleum-based hydrocarbon oil (Newtonian fluid) specified by JIS Z 8809 is used as a calibration standard solution, and the measured value is the viscosity of the standard solution. Adjust to match. It should be noted that an equivalent result can be obtained by using a commercially available model other than the TVE-20L viscometer cone plate type, selecting and implementing a cone rotor in the same manner as described above, and appropriately calibrating.
Rotor used: Standard rotor (1 ° 34 ', R = 2.4 cm)
Rotation speed: 100rpm
Sample volume: 1ml
Measurement temperature: 20 ° C
Time: Viscosity after 3 minutes was taken as a measured value.

Test Example 1: Evaluation of irritation Eye drops of Examples 1 and 2 and Comparative Examples 1 and 2 described in Table 1 were prepared according to a conventional method and filled into plastic containers. These eye drops are administered to 5 subjects (subjects who are more sensitive to external stimuli than usual) who have symptoms such as mild conjunctival hyperemia or itchy eyes, and eye irritation immediately after instillation (pain, Unpleasant stimuli such as spots) were evaluated. Both the example and the comparative example were compared and evaluated as 0 points for those that felt strong stimulation, 2 points for those that felt weak stimulation, and 4 points that did not feel any stimulation.
The evaluation points of all the subjects were averaged, the average value was less than 2 points, x was 2 points or more and less than 3 points, Δ was 3 points or more.
The results are shown in Table 1. It was confirmed that the eye irritation was remarkably improved in the example as compared with the comparative example. In addition, it was confirmed to be a highly safe eye drop without conjunctival hyperemia or deterioration of itchy eyes.
Test Example 2: Evaluation of persistence of refreshing feeling The eye drops of Examples 1 and 2 and Comparative Examples 1 and 2 described in Table 1 were prepared according to a conventional method and filled in a plastic container. Apply these eye drops to 5 subjects with symptoms such as mild conjunctival hyperemia or itchy eyes (subjects who are more sensitive to external stimuli than usual) to maintain the refreshing feeling after instillation. evaluated.
If the refreshing feeling is too weak and almost unfeeling, it is rated as 0, the comfortable refreshing feeling that is neither too strong nor too weak is rated as 1 level, and if the refreshing feeling is too strong and unpleasant, it is rated as 3 levels, and is comfortable. The duration of level 1, which is a refreshing feeling, was evaluated.
Table 2 shows the results of averaging the time during which a pleasant refreshing feeling was maintained after the test (the duration evaluated as level 1) among all the subjects. Compared to the comparative example, it was confirmed that the example maintained a pleasant refreshing feeling for a long time.
Test Example 3: Stimulation evaluation and refreshment continuation test 2
The eye drops of Examples 3 to 6 and Comparative Examples 3 to 6 shown in Table 3 were prepared according to a conventional method and filled into a plastic container. These were evaluated in the same manner as in Test Example 1.
As a result, good results were obtained for Examples 3 to 6 as compared with the corresponding Comparative Examples 3 to 6, respectively.
In addition, although the eye drops of Comparative Examples 3 and 4 were difficult to blink, Examples 3 and 4 also had an effect that the blink was smooth.
Test Example 4: Stimulation evaluation and refreshment continuation test 3
The contact lens mounting liquids of Example 7 and Comparative Example 7 listed in Table 4, the eyewashes of Example 8 and Comparative Example 8, and the contact lens disinfecting liquids (multipurpose solutions) of Example 9 and Comparative Example 9 according to a conventional method. Prepared and filled into plastic container. These were evaluated in the same manner as in Test Examples 1 and 2. In the case of the contact lens mounting liquid, the soft contact lens was wetted with 1 to 2 drops of the contact lens mounting liquid of the present invention, and then the lens was mounted for use. Similarly, an oxygen permeable hard contact lens was also tested. In the case of an eye wash, 5 mL of the eye wash of the present invention was placed in an eye cup attached to a commercially available eye wash, the eye cup was put in contact with the eye wash, and blinking was repeated several times. In the case of contact lens disinfectant (multipurpose solution), place the soft contact lens on the palm, apply a few drops of the contact lens disinfectant (multipurpose solution) of the present invention, and gently wash and wash both sides of the lens with your fingers. Rinse the lens with the contact lens disinfectant of the present invention (multipurpose solution), put the contact lens disinfectant of the present invention (multipurpose solution) into the contact lens case for 8-10 minutes, and soak the lens in it It was left for 4 hours and used with a lens attached. Similarly, an oxygen permeable hard contact lens was also tested.
As a result, good results were obtained for Examples 7 to 9 as compared with Comparative Examples 7 to 9, respectively.

  As described above, in the present invention, in the ophthalmic composition containing menthol and a surfactant, by including dextran, even at low viscosity (viscosity of less than 3.0 mPa · s at 20 ° C.), menthol and The effect of reducing the feeling of irritation generated by the coexistence of the surfactant and increasing the duration of the refreshing feeling that is high in safety and comfortable is obtained. In addition, the composition of the present invention can be suitably used even when the patient's keratoconjunctival surface is more sensitive to external stimuli than usual.

Test Example 5: Evaluation of improvement effect on eye movement The improvement effect on eye movement was evaluated using a dry eye analysis system TSAS (Tear Stability Analysis System). Specifically, the evaluation was performed using an autoleft photographer (TOMEY RT-6000 instrument; manufactured by Tome Corporation) and tear fluid stability analysis software TSAS (manufactured by Tome Corporation). The experiment was conducted by using the autoleft poker and tear fluid stability analysis software TSAS according to the attached instruction manual.
First, eye drops of Example 10 and Comparative Examples 10-1, 10-2, and 10-3 described in Table 5 below were prepared according to a conventional method and filled into a plastic container. Prior to instillation, the subject opened the eye for 10 seconds, took a Meyer ring image of the cornea at 1 second intervals with TSAS, and visualized the time and area where the distortion occurred as a color code map. Was used to evaluate tear fluid stability. Subsequently, the eye drop of each Example and the comparative example was instilled to the test subject. Five minutes after the instillation, the subject was opened for 10 seconds in the same manner as described above, and a Mayer ring image of the cornea was taken at intervals of 1 second by TSAS, and tear fluid was obtained using the resulting break-up map. Stability was evaluated.

  The obtained breakup map is shown in FIGS. In the figure, the number next to the color bar on the right hand indicates the number of seconds in which the distortion of the Meyer ring image has occurred since the start of measurement. In the break-up map, when the tear film is unstable, the Meyer ring image projected on the cornea is distorted from an early stage, so the map is colored warm, and conversely, the tear film is stable. Is colored in cold colors. Therefore, it is possible to examine the degree of improvement in the stability of the tear film by changing the hue of the map. As shown in FIG. 4, when the eye drop of Example 10 was used, the area occupied by the cold-colored shade (dark blue) increased compared to that before instillation (FIG. 2), and the stability of the tear film was increased. It was clear that was significantly improved. On the other hand, when the eye drops of Comparative Examples 10-1 to 10-3 are used, is improvement not observed in the same color shade as before eye drop (FIG. 2) (Comparative Example 10-2; FIG. 6)? On the contrary, it was shown that the warm-colored hue increased and the tear film was destabilized (Comparative Examples 10-1, 10-3; FIGS. 5 and 7). From the above results, it has been clarified that the combined use of dextran, menthol, surfactant and acidic polysaccharide significantly improves tear film stability.

Test Example 6: Evaluation of reduction effect on irritation caused by sodium edetate The eye drops of Example 11 and Comparative Example 11 described in Table 6 were prepared according to a conventional method, and filled in a plastic container. These eye drops are instilled into subjects (subjects who are more sensitive to external stimuli than usual) with symptoms such as mild conjunctival hyperemia or itchy eyes, and eye irritation immediately after instillation (pain, stains, etc.) Of unpleasant irritation). Both the example and the comparative example were compared and evaluated as 0 points for those that felt strong stimulation, 2 points for those that felt weak stimulation, and 4 points that did not feel any stimulation. The evaluation points of all the subjects were averaged, the average value was less than 2 points, x was 2 points or more and less than 3 points, Δ was 3 points or more.
The results are shown in Table 6. It was confirmed that the eye irritation was remarkably improved in the example as compared with the comparative example.

Formulation Example 1-60
In the formulations shown in Tables 7-14 below, eye drops (Prescription Examples 1-19, 47-60), eyewashes (Prescription Examples 20-28), contact lens mounting liquids (Prescription Examples 29-35), contact lens disinfection A liquid (multipurpose solution) (Formulation Examples 36-46) was prepared.

It is explanatory drawing of a cone-plate-type rotational viscometer. It is a break-up map which analyzed the state of the right eye before instillation in evaluation of the improvement effect with respect to eye movement. It is a break-up map which analyzed the state of the left eye before instillation in evaluation of the improvement effect with respect to eye movement. In evaluation of the improvement effect with respect to eye movement, it is the breakup map which analyzed the state of the right eye 5 minutes after instilling Example 10. FIG. It is a break-up map which analyzed the state of the left eye 5 minutes after instilling the comparative example 10-1 in evaluation of the improvement effect with respect to eye contact. It is a breakup map which analyzed the state of the right eye 5 minutes after instilling the comparative example 10-2 in evaluation of the improvement effect with respect to eye-opening. It is a break-up map which analyzed the state of the left eye 5 minutes after instilling the comparative example 10-3 in evaluation of the improvement effect with respect to eye contact.

Claims (2)

(A) Dextran,
An ophthalmic composition containing (B) menthol and (C) a surfactant. The ophthalmic composition according to claim 1, further comprising (E) one or more selected from the group consisting of hyaluronic acid, alginic acid, and salts thereof.