JP4442118B2 - Stable eye drops - Google Patents
Stable eye drops Download PDFInfo
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- JP4442118B2 JP4442118B2 JP2003152991A JP2003152991A JP4442118B2 JP 4442118 B2 JP4442118 B2 JP 4442118B2 JP 2003152991 A JP2003152991 A JP 2003152991A JP 2003152991 A JP2003152991 A JP 2003152991A JP 4442118 B2 JP4442118 B2 JP 4442118B2
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Description
【0001】
【発明の属する技術分野】
本発明は、クロモグリク酸ナトリウム及びコンドロイチン硫酸ナトリウムを配合する点眼剤に関し、詳しくは防腐剤としてパラベン類を配合することにより、安全かつ長期間安定である点眼剤に関する。
【0002】
【従来の技術】
クロモグリク酸ナトリウムは、抗原抗体反応に伴う肥満細胞からのヒスタミンやSRS−A等の化学伝達物質の遊離を抑制することから、アレルギー性鼻炎、アレルギー性眼疾患の治療剤として有用であることが知られており、点鼻剤、点眼剤等の外用液剤に用いられている。一方、コンドロイチン硫酸ナトリウムは、体組織を強固にすると同時に組織における個々の細胞の新陳代謝を促進する酸性ムコ多糖類であり、組織修復作用、角膜保護作用、粘稠作用を有することから多くの点眼剤に使用されている成分である。これら抗アレルギー作用と角膜保護作用を併せ持ち、抗アレルギー剤の治療効果を高めた点眼剤、すなわち、クロモグリク酸ナトリウム及びコンドロイチン硫酸ナトリウムを同時に配合した点眼剤は予てから望まれていたが、種々の問題があるため開発は困難であった。
【0003】
点眼剤に使用される防腐剤としては、塩化ベンザルコニウムに代表される第4級アンモニウム塩類が第一選択とされているが、これらをクロモグリク酸ナトリウムやコンドロイチン硫酸ナトリウムを含有する点眼液に使用した場合、反応を起こし、著しい白濁及び沈殿を生じるという問題が発生する。この反応を抑制する手段としては、特定の非イオン界面活性剤を特定量添加する方法(特開昭63−255221号公報)、非イオン性界面活性剤とグリチルリチン酸塩を配合する方法(特開2000−319180号)等が知られているが、非イオン性界面活性剤は長期間の保存により劣化し、可溶化能の低下を起こすことから、前述の白濁・沈澱を長期間にわたって防止するためには、非イオン性界面活性剤の相当量を配合する必要がある。しかしながら、非イオン界面活性剤は連用すると溶血作用、粘膜刺激作用等の副作用があることが知られており、眼科領域においては、角膜障害の原因となることが示唆(日本コンタクトレンズ学会誌38 (2) 82-85 1996)されているため、点眼剤への使用は極力少量に抑えるか、配合しないことが望ましい。他方、塩化ベンザルコニウムにおいても、角膜上皮に対し障害を引き起こすことが報告(日本眼科紀要42 (5) 780-783 1991)されており、アレルギー症状を惹起し、正常状態と異なる眼部に対する安全性が懸念される。
クロモグリク酸ナトリウムとコンドロイチン硫酸ナトリウムを同時に配合した点眼剤の防腐剤として、ソルビン酸やクロロブタノールを使用する場合、防腐剤としての効力が不充分であったり、液中で分解し易いため経時的に点眼剤のpHを変動させてしまう等、上記問題を解決する点眼剤として満足のいくものではなかった。
一方、パラオキシ安息香酸メチル、パラオキシ安息香酸エチル、パラオキシ安息香酸プロピル又はパラオキシ安息香酸ブチル等のパラベン類は毒性の少ない防腐剤であり(点眼剤(本瀬賢治著)南山堂 77 1984)、安全性が高いため食品、化粧品等幅広い分野で汎用されているものである。
しかしながら、クロモグリク酸ナトリウム、コンドロイチン硫酸ナトリウム及びパラベン類を同時に配合した点眼剤はこれまでに開発されていなかった。
【0004】
【発明が解決しようとする課題】
クロモグリク酸ナトリウム及びコンドロイチン硫酸ナトリウムを同時に配合した点眼剤において、安全かつ長期間安定である点眼剤を提供することを課題とする。
【0005】
【課題を解決するための手段】
本発明者らは、上述の課題を解決すべく鋭意研究した結果、パラベン類の配合が第4級アンモニウム塩類や非イオン性界面活性剤の使用による安定性及び安全面の問題等を解決するに最適な防腐剤であることを見い出し、本発明を完成するに至った。すなわち、本発明は、クロモグリク酸ナトリウムとコンドロイチン硫酸ナトリウム及びパラベン類を含有する点眼剤で、安全かつ長期間安定である点眼剤に関する。
【0006】
本発明に使用されるクロモグリク酸ナトリウムの配合量は、通常0.4〜5.0%(w/v)であり、好ましくは1.0〜2.0%(w/v)である。
【0007】
本発明に使用されるコンドロイチン硫酸ナトリウムの配合量は、通常0.05〜2.0%(w/v)であり、好ましくは0.1〜1.0%(w/v)である。
【0008】
本発明で用いられるパラベン類としては、パラオキシ安息香酸メチル、パラオキシ安息香酸エチル、パラオキシ安息香酸プロピル又はパラオキシ安息香酸ブチルが好ましく、これらの1種又は2種以上を混合したものも使用することができる。また、本発明におけるパラベン類の配合量としては通常0.001〜0.2%(w/v)であり、好ましくは0.005〜0.1%(w/v)であり、特に好ましくは0.01〜0.03%(w/v)である。
【0009】
【発明の実施の形態】
本発明の点眼剤は、通例、以下の操作によって調製するが、本発明を達成することができる調製方法であれば良く、特に限定はされない。例えばコンドロイチン硫酸ナトリウム及びパラベン類を精製水に溶解し、次いでクロモグリク酸ナトリウムを添加溶解し、必要に応じて他の薬剤の添加、pHの調整、メンブランフィルター等を用いた濾過滅菌処理等を行うことによって得られる。また、pHの調整に関しては、本発明を達成し得る範囲に調整すればよく、特にpH値が4.0〜8.0となるように調整することが好ましい。このようにして得られた点眼剤は調製直後も、また長期保存によっても白濁や沈殿は起こらず安定である。
【0010】
本発明の点眼剤には、必要に応じてエタノール、プロピレングリコール等のアルコール類、ホウ酸、ホウ砂、リン酸水素ナトリウム等の緩衝剤、塩化ナトリウム、塩化カリウム等の無機塩類、エデト酸ナトリウム等のキレート剤、アズレンスルホン酸ナトリウム、グリチルリチン酸二カリウム、アラントイン、塩化ベルベリン、イプシロンアミノカプロン酸等の消炎成分、グルタミン酸、タウリン、アスパラギン酸マグネシウム等のアミノ酸類、塩酸ピリドキシン、シアノコバラミン、フラビンアデニンジヌクレオチド等のビタミン類、塩酸テトラヒドロゾリン、塩酸ナファゾリン、塩酸フェニレフリン等の充血除去成分、マレイン酸クロルフェニラミン、塩酸ジフェンヒドラミン等の抗ヒスタミン剤、メチル硫酸ネオスチグミン等の眼機能を調節する成分、硫酸亜鉛等の収斂成分、さらにはメントール、ボルネオール、カンフル等の清涼化剤も添加することができる。
【0011】
【実施例】
以下に実施例及び比較例を挙げて本発明を詳細に説明するが、本発明はこれらに限定されるものではない。なお、比較例にはパラベン類の代わりに第4級アンモニウム塩類、非イオン性界面活性剤を添加した点眼剤を用いた。
【0012】
実施例1
ホウ酸1.2g、パラオキシ安息香酸メチル0.02g、パラオキシ安息香酸プロピル0.01g及びコンドロイチン硫酸ナトリウム0.5gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、塩化ナトリウム0.1g、クロモグリク酸ナトリウム1.0g及びマレイン酸クロルフェニラミン0.015gを溶解した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを6.0に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0013】
実施例2
ホウ酸0.8g、パラオキシ安息香酸エチル0.03g及びコンドロイチン硫酸ナトリウム0.2gを適量の滅菌精製水に加温溶解し、冷却後、クロモグリク酸ナトリウム2.0g及びマレイン酸クロルフェニラミン0.03gを溶解した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを5.0に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0014】
実施例3
ホウ酸1.0g、パラオキシ安息香酸エチル0.01g、パラオキシ安息香酸ブチル0.004g及びコンドロイチン硫酸ナトリウム1.0gを適量の滅菌精製水に加温溶解し、冷却後、塩化ナトリウム0.1g、クロモグリク酸ナトリウム1.0g、マレイン酸クロルフェニラミン0.03g及びアズレンスルホン酸ナトリウム0.02gを溶解した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを7.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0015】
実施例4
L−グルタミン酸0.25g、パラオキシ安息香酸メチル0.02g、パラオキシ安息香酸エチル0.01g、アラントイン0.2g及びコンドロイチン硫酸ナトリウム0.5gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、塩化ナトリウム0.2g、クロモグリク酸ナトリウム1.0g及びマレイン酸クロルフェニラミン0.015gを溶解した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを5.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0016】
実施例5
リン酸二水素ナトリウム0.16g、リン酸二ナトリウム0.05g、パラオキシ安息香酸メチル0.03g及びコンドロイチン硫酸ナトリウム1.0gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、塩化ナトリウム0.5g、クロモグリク酸ナトリウム1.0g、マレイン酸クロルフェニラミン0.015g及び塩酸テトラヒドロゾリン0.05gを溶解した。これに、予め滅菌精製水に溶解した水酸化ナトリウム適量を加えて、pHを6.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0017】
実施例6
ホウ酸1.0g、パラオキシ安息香酸エチル0.02g、パラオキシ安息香酸プロピル0.01g及びコンドロイチン硫酸ナトリウム0.1gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、クロモグリク酸ナトリウム2.0g、マレイン酸クロルフェニラミン0.02g及びグリチルリチン酸二カリウム0.25gを溶解した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを6.0に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0018】
実施例7
ホウ酸0.8g、パラオキシ安息香酸メチル0.01g、パラオキシ安息香酸プロピル0.01g及びコンドロイチン硫酸ナトリウム1.0gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、クロモグリク酸ナトリウム2.0g及びマレイン酸クロルフェニラミン0.01gを溶解した。これに、95%エタノール0.5mLにL−メントール0.005g、d−カンフル0.01g及びd−ボルネオール0.01gを予め溶解させて添加した。さらに、滅菌精製水に溶解したホウ砂適量を加えて、pHを5.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0019】
比較例1
ホウ酸1.2g及びコンドロイチン硫酸ナトリウム0.5gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、塩化ナトリウム0.1g、クロモグリク酸ナトリウム1.0g及びマレイン酸クロルフェニラミン0.015gを溶解し、塩化ベンザルコニウム液(10%)0.1mLを加えて混和した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを6.0に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0020】
比較例2
ホウ酸0.8g及びコンドロイチン硫酸ナトリウム0.2gを適量の滅菌精製水に加温溶解し、冷却後、クロモグリク酸ナトリウム2.0g及びマレイン酸クロルフェニラミン0.03gを溶解し、塩化ベンゼトニウム液(10%)0.1mLを加えて混和した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを5.0に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0021】
比較例3
ホウ酸1.0g、コンドロイチン硫酸ナトリウム1.0g及びポリオキシエチレン硬化ヒマシ油60 0.02gを適量の滅菌精製水に加温溶解し、冷却後、塩化ナトリウム0.1g、クロモグリク酸ナトリウム1.0g、マレイン酸クロルフェニラミン0.03g及びアズレンスルホン酸ナトリウム0.02gを溶解し、ポリソルベート80 0.01g及び塩化ベンザルコニウム液(10%)0.1mLを加えて混和した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを7.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0022】
比較例4
L−グルタミン酸0.25g、アラントイン0.2g及びコンドロイチン硫酸ナトリウム0.5gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、塩化ナトリウム0.2g、クロモグリク酸ナトリウム1.0g及びマレイン酸クロルフェニラミン0.015gを溶解し、ポリソルベート800.02g及び塩化ベンゼトニウム液(10%)0.1mLを加えて混和した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを5.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0023】
比較例5
リン酸二水素ナトリウム0.16g、リン酸二ナトリウム0.05g、コンドロイチン硫酸ナトリウム1.0g及びポリオキシエチレン硬化ヒマシ油60 0.02gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、塩化ナトリウム0.5g、クロモグリク酸ナトリウム1.0g、マレイン酸クロルフェニラミン0.015g及び塩酸テトラヒドロゾリン0.05gを溶解し、グルコン酸クロルヘキシジン液(20%)0.05mLを加えて混和した。これに、予め滅菌精製水に溶解した水酸化ナトリウム適量を加えて、pHを6.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0024】
比較例6
ホウ酸1.0g及びコンドロイチン硫酸ナトリウム0.1gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、クロモグリク酸ナトリウム2.0g、マレイン酸クロルフェニラミン0.02g及びグリチルリチン酸二カリウム0.25gを溶解し、ポリソルベート80 0.02g及び塩化ベンザルコニウム液(10%)0.1mLを加えて混和した。これに、予め滅菌精製水に溶解したホウ砂適量を加えて、pHを6.0に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0025】
比較例7
ホウ酸0.8g、コンドロイチン硫酸ナトリウム1.0g及びポリオキシエチレン硬化ヒマシ油60 0.06gを適量の滅菌精製水に加温溶解し、冷却後、エデト酸ナトリウム0.01g、クロモグリク酸ナトリウム2.0g及びマレイン酸クロルフェニラミン0.01gを溶解し、塩化ベンザルコニウム液(10%)0.2mLを加えて混和した。これに、95%エタノール0.5mLにL−メントール0.005g、d−カンフル0.01g及びd−ボルネオール0.01gを予め溶解させて添加した。さらに、滅菌精製水に溶解したホウ砂適量を加えて、pHを5.5に調整した後、滅菌精製水を加えて全量を100mLとした。この液をポリエチレンテレフタレート製10mL点眼容器に充填して施栓し、点眼剤とした。
【0026】
試験例
上記の方法で製造した実施例及び比較例の各点眼剤の製造直後、50℃の苛酷条件下で8週間保存後及び40℃相対湿度75%条件下で6箇月間保存後の沈殿又は懸濁の発生を蛍光灯下、肉眼で観察した。結果を表1及び表2に示した。なお、沈殿又は懸濁の判定基準は、沈殿及び懸濁が全く認められないものを−、若干の懸濁が認められるものを+、明確な沈殿及び懸濁が認められるものを++とした。
【0027】
【表1】
【0028】
【表2】
【0029】
表1及び表2より明らかなように、実施例の点眼剤は、比較例の点眼剤に比べて外観の変化が見られず、非常に安定であることが確認された。
【0030】
【発明の効果】
本発明は、従来困難であったクロモグリク酸ナトリウム及びコンドロイチン硫酸ナトリウムを同時に配合した点眼剤において、防腐剤としてパラベン類を配合することにより、安全かつ長期間安定となり、アレルギー性眼疾患の患者に極めて有用な点眼剤の提供を可能にした。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an eye drop containing sodium cromoglycate and sodium chondroitin sulfate, and more particularly to an eye drop which is safe and stable for a long period of time by adding parabens as a preservative.
[0002]
[Prior art]
It is known that cromoglycate sodium is useful as a therapeutic agent for allergic rhinitis and allergic eye diseases because it suppresses the release of chemical mediators such as histamine and SRS-A from mast cells associated with antigen-antibody reactions. It is used for external liquids such as nasal drops and eye drops. On the other hand, chondroitin sulfate sodium is an acidic mucopolysaccharide that strengthens the body tissue and promotes the metabolism of individual cells in the tissue, and has many eye drops because it has a tissue repair action, a corneal protection action, and a viscous action. It is a component used in These eye drops that have both an antiallergic action and a corneal protective action and improved the therapeutic effect of antiallergic drugs, that is, eye drops containing sodium cromoglycate and sodium chondroitin sulfate at the same time have been desired for some time. Development has been difficult because of this.
[0003]
As preservatives used in eye drops, quaternary ammonium salts represented by benzalkonium chloride are the first choice, but these are used in eye drops containing sodium cromoglycate or sodium chondroitin sulfate. In such a case, a problem occurs in that the reaction occurs and significant cloudiness and precipitation occur. As a means for suppressing this reaction, a method of adding a specific amount of a specific nonionic surfactant (Japanese Patent Laid-Open No. 63-255221), a method of blending a nonionic surfactant and glycyrrhizinate (Japanese Patent Laid-Open No. 63-255221) 2000-319180) etc. are known, but nonionic surfactants are deteriorated by long-term storage and cause a decrease in solubilization ability, so that the above-mentioned cloudiness / precipitation is prevented over a long period of time. It is necessary to add a considerable amount of the nonionic surfactant. However, non-ionic surfactants are known to cause side effects such as hemolysis and mucous membrane irritation when used continuously, suggesting that they may cause corneal damage in ophthalmology (Japanese Journal of Contact Lenses 38 ( 2) 82-85 1996), it is desirable to use it in eye drops as little as possible, or not mix it. On the other hand, benzalkonium chloride has also been reported to cause damage to the corneal epithelium (Japanese Journal of Ophthalmology 42 (5) 780-783 1991), causing allergic symptoms and safety for the eyes different from normal There is concern about sex.
When using sorbic acid or chlorobutanol as a preservative for eye drops containing sodium cromoglycate and sodium chondroitin sulfate at the same time, the efficacy as a preservative is insufficient or it is easy to decompose in the liquid over time. It was not satisfactory as an ophthalmic solution that solves the above problems, such as changing the pH of the ophthalmic solution.
On the other hand, parabens such as methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate or butyl paraoxybenzoate are preservatives with low toxicity (eye drops (written by Kenji Honse), Nanzan-do 77 1984) and are safe. Therefore, it is widely used in a wide range of fields such as food and cosmetics.
However, no ophthalmic solution containing sodium cromoglycate, sodium chondroitin sulfate and parabens at the same time has been developed so far.
[0004]
[Problems to be solved by the invention]
It is an object of the present invention to provide an eye drop that is safe and stable for a long period of time in an eye drop that contains sodium cromoglycate and sodium chondroitin sulfate simultaneously.
[0005]
[Means for Solving the Problems]
As a result of diligent research to solve the above-mentioned problems, the present inventors have solved the problem of stability and safety due to the use of quaternary ammonium salts or nonionic surfactants when parabens are added. The present inventors have found that it is an optimal preservative and have completed the present invention. That is, the present invention relates to an ophthalmic solution containing sodium cromoglycate, sodium chondroitin sulfate and parabens, which is safe and stable for a long period of time.
[0006]
The amount of sodium cromoglycate used in the present invention is usually 0.4 to 5.0% (w / v), preferably 1.0 to 2.0% (w / v).
[0007]
The amount of sodium chondroitin sulfate used in the present invention is usually 0.05 to 2.0% (w / v), preferably 0.1 to 1.0% (w / v).
[0008]
As the parabens used in the present invention, methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate or butyl paraoxybenzoate is preferable, and one or a mixture of two or more of these can also be used. . In addition, the blending amount of the parabens in the present invention is usually 0.001 to 0.2% (w / v), preferably 0.005 to 0.1% (w / v), particularly preferably. 0.01 to 0.03% (w / v).
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The eye drop of the present invention is usually prepared by the following operation, but any preparation method capable of achieving the present invention may be used without any particular limitation. For example, sodium chondroitin sulfate and parabens are dissolved in purified water, then sodium cromoglycate is added and dissolved, and other chemicals are added, pH is adjusted, and filter sterilization using a membrane filter is performed as necessary. Obtained by. Moreover, regarding pH adjustment, it may adjust to the range which can achieve this invention, and it is preferable to adjust especially pH value to be 4.0-8.0. The eye drop thus obtained is stable with no cloudiness or precipitation even immediately after preparation or even after long-term storage.
[0010]
The eye drops of the present invention include alcohols such as ethanol and propylene glycol as necessary, buffers such as boric acid, borax, and sodium hydrogen phosphate, inorganic salts such as sodium chloride and potassium chloride, sodium edetate, and the like. Chelating agents, sodium azulenesulfonate, dipotassium glycyrrhizinate, allantoin, berberine chloride, epsilon aminocaproic acid and other anti-inflammatory components, amino acids such as glutamic acid, taurine, magnesium aspartate, pyridoxine hydrochloride, cyanocobalamin, flavin adenine dinucleotide, etc. Decongestants such as vitamins, tetrahydrozoline hydrochloride, naphazoline hydrochloride, phenylephrine hydrochloride, antihistamines such as chlorpheniramine maleate and diphenhydramine hydrochloride, and eye functions such as neostigmine methyl sulfate Modulate component, astringent component such as zinc sulfate, further menthol, borneol, can also be added freshening agent camphor.
[0011]
【Example】
Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto. In Comparative Examples, eye drops containing quaternary ammonium salts and nonionic surfactants were used instead of parabens.
[0012]
Example 1
1.2 g of boric acid, 0.02 g of methyl paraoxybenzoate, 0.01 g of propyl paraoxybenzoate and 0.5 g of sodium chondroitin sulfate are dissolved by heating in an appropriate amount of sterilized purified water, and after cooling, 0.01 g of sodium edetate, Sodium chloride 0.1g, sodium cromoglycate 1.0g and chlorpheniramine maleate 0.015g were dissolved. An appropriate amount of borax previously dissolved in sterilized purified water was added thereto to adjust the pH to 6.0, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0013]
Example 2
0.8 g of boric acid, 0.03 g of ethyl paraoxybenzoate and 0.2 g of sodium chondroitin sulfate are dissolved by heating in an appropriate amount of sterilized purified water, and after cooling, 2.0 g of sodium cromoglycate and 0.03 g of chlorpheniramine maleate Was dissolved. An appropriate amount of borax previously dissolved in sterilized purified water was added to adjust the pH to 5.0, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0014]
Example 3
1.0 g of boric acid, 0.01 g of ethyl paraoxybenzoate, 0.004 g of butyl paraoxybenzoate and 1.0 g of sodium chondroitin sulfate are dissolved by heating in an appropriate amount of sterilized purified water. After cooling, 0.1 g of sodium chloride, cromoglyc 1.0 g of sodium acid, 0.03 g of chlorpheniramine maleate and 0.02 g of sodium azulene sulfonate were dissolved. An appropriate amount of borax previously dissolved in sterilized purified water was added to adjust the pH to 7.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0015]
Example 4
0.25 g of L-glutamic acid, 0.02 g of methyl paraoxybenzoate, 0.01 g of ethyl paraoxybenzoate, 0.2 g of allantoin and 0.5 g of sodium chondroitin sulfate are dissolved by heating in an appropriate amount of sterilized purified water, cooled, 0.01 g sodium acid, 0.2 g sodium chloride, 1.0 g sodium cromoglycate and 0.015 g chlorpheniramine maleate were dissolved. An appropriate amount of borax previously dissolved in sterilized purified water was added to adjust the pH to 5.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0016]
Example 5
Sodium dihydrogen phosphate 0.16 g, disodium phosphate 0.05 g, methyl parahydroxybenzoate 0.03 g, and chondroitin sulfate 1.0 g were dissolved by heating in an appropriate amount of sterilized purified water. After cooling, sodium edetate 0 0.01 g, 0.5 g sodium chloride, 1.0 g sodium cromoglycate, 0.015 g chlorpheniramine maleate and 0.05 g tetrahydrozoline hydrochloride were dissolved. An appropriate amount of sodium hydroxide previously dissolved in sterilized purified water was added to adjust the pH to 6.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0017]
Example 6
1.0 g of boric acid, 0.02 g of ethyl paraoxybenzoate, 0.01 g of propyl paraoxybenzoate and 0.1 g of sodium chondroitin sulfate were dissolved by heating in an appropriate amount of sterilized purified water, and after cooling, 0.01 g of sodium edetate, 2.0 g of sodium cromoglycate, 0.02 g of chlorpheniramine maleate and 0.25 g of dipotassium glycyrrhizinate were dissolved. An appropriate amount of borax previously dissolved in sterilized purified water was added thereto to adjust the pH to 6.0, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0018]
Example 7
0.8 g of boric acid, 0.01 g of methyl paraoxybenzoate, 0.01 g of propyl paraoxybenzoate and 1.0 g of sodium chondroitin sulfate were dissolved by heating in an appropriate amount of sterilized purified water, and after cooling, 0.01 g of sodium edetate, 2.0 g of sodium cromoglycate and 0.01 g of chlorpheniramine maleate were dissolved. To this, 0.005 g of L-menthol, 0.01 g of d-camphor and 0.01 g of d-borneol were previously dissolved and added in 0.5 mL of 95% ethanol. Further, an appropriate amount of borax dissolved in sterilized purified water was added to adjust the pH to 5.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0019]
Comparative Example 1
1.2 g boric acid and 0.5 g sodium chondroitin sulfate are dissolved by heating in an appropriate amount of sterilized purified water. After cooling, 0.01 g sodium edetate, 0.1 g sodium chloride, 1.0 g sodium cromoglycate and chloro maleate 0.015 g of pheniramine was dissolved, and 0.1 mL of benzalkonium chloride solution (10%) was added and mixed. An appropriate amount of borax previously dissolved in sterilized purified water was added thereto to adjust the pH to 6.0, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0020]
Comparative Example 2
0.8 g of boric acid and 0.2 g of sodium chondroitin sulfate are dissolved by heating in an appropriate amount of sterilized purified water. After cooling, 2.0 g of sodium cromoglycate and 0.03 g of chlorpheniramine maleate are dissolved, and benzethonium chloride solution ( 10%) 0.1 mL was added and mixed. An appropriate amount of borax previously dissolved in sterilized purified water was added to adjust the pH to 5.0, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0021]
Comparative Example 3
1.0 g boric acid, 1.0 g sodium chondroitin sulfate and 0.02 g polyoxyethylene hydrogenated castor oil 60 are dissolved by heating in an appropriate amount of sterilized purified water, and after cooling, 0.1 g sodium chloride, 1.0 g sodium cromoglycate Then, 0.03 g of chlorpheniramine maleate and 0.02 g of sodium azulenesulfonate were dissolved, and 0.01 g of polysorbate 80 and 0.1 mL of benzalkonium chloride solution (10%) were added and mixed. An appropriate amount of borax previously dissolved in sterilized purified water was added to adjust the pH to 7.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0022]
Comparative Example 4
L-glutamic acid 0.25 g, allantoin 0.2 g and chondroitin sodium sulfate 0.5 g are dissolved by heating in an appropriate amount of sterilized purified water, and after cooling, sodium edetate 0.01 g, sodium chloride 0.2 g, cromoglycate sodium 1 0.0 g and 0.015 g of chlorpheniramine maleate were dissolved, and 800.02 g of polysorbate and 0.1 mL of benzethonium chloride solution (10%) were added and mixed. An appropriate amount of borax previously dissolved in sterilized purified water was added to adjust the pH to 5.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0023]
Comparative Example 5
Sodium dihydrogen phosphate 0.16 g, disodium phosphate 0.05 g, chondroitin sodium sulfate 1.0 g, and polyoxyethylene hydrogenated castor oil 60 0.02 g were dissolved by heating in an appropriate amount of sterilized purified water. Dissolve 0.01 g of sodium salt, 0.5 g of sodium chloride, 1.0 g of sodium cromoglycate, 0.015 g of chlorpheniramine maleate and 0.05 g of tetrahydrozoline hydrochloride, add 0.05 mL of chlorhexidine gluconate solution (20%) And mixed. An appropriate amount of sodium hydroxide previously dissolved in sterilized purified water was added to adjust the pH to 6.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0024]
Comparative Example 6
1.0 g boric acid and 0.1 g sodium chondroitin sulfate are dissolved by heating in an appropriate amount of sterilized purified water, and after cooling, 0.01 g sodium edetate, 2.0 g sodium cromoglycate, 0.02 g chlorpheniramine maleate and 0.25 g of dipotassium glycyrrhizinate was dissolved, and 0.02 g of polysorbate 80 and 0.1 mL of benzalkonium chloride solution (10%) were added and mixed. An appropriate amount of borax previously dissolved in sterilized purified water was added thereto to adjust the pH to 6.0, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0025]
Comparative Example 7
1. 0.8 g boric acid, 1.0 g sodium chondroitin sulfate and 0.06 g polyoxyethylene hydrogenated castor oil 60 were dissolved by heating in an appropriate amount of sterilized purified water. After cooling, 0.01 g sodium edetate and sodium cromoglycate 0 g and 0.01 g of chlorpheniramine maleate were dissolved, and 0.2 mL of benzalkonium chloride solution (10%) was added and mixed. To this, 0.005 g of L-menthol, 0.01 g of d-camphor and 0.01 g of d-borneol were previously dissolved and added in 0.5 mL of 95% ethanol. Further, an appropriate amount of borax dissolved in sterilized purified water was added to adjust the pH to 5.5, and then sterilized purified water was added to make the total volume 100 mL. This solution was filled in a 10 mL eye drop container made of polyethylene terephthalate and plugged into an eye drop.
[0026]
Test Example Immediately after the preparation of each of the eye drops of Examples and Comparative Examples prepared by the above method, after storage for 8 weeks under severe conditions at 50 ° C and after storage for 6 months at 40 ° C and 75% relative humidity, The occurrence of suspension was observed with the naked eye under a fluorescent lamp. The results are shown in Tables 1 and 2. The judgment criteria for precipitation or suspension were-when no precipitation or suspension was observed, + when slight suspension was observed, and ++ when clear precipitation or suspension was observed.
[0027]
[Table 1]
[0028]
[Table 2]
[0029]
As is clear from Tables 1 and 2, it was confirmed that the eye drops of Examples were very stable with no change in appearance as compared with the eye drops of Comparative Examples.
[0030]
【The invention's effect】
The present invention is an ophthalmic solution containing sodium cromoglycate and chondroitin sulfate, which has been difficult in the past, and is safe and stable for a long period of time by adding parabens as an antiseptic. It became possible to provide useful eye drops.
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