JPWO2013140799A1 - 経皮吸収型製剤 - Google Patents
経皮吸収型製剤 Download PDFInfo
- Publication number
- JPWO2013140799A1 JPWO2013140799A1 JP2014506041A JP2014506041A JPWO2013140799A1 JP WO2013140799 A1 JPWO2013140799 A1 JP WO2013140799A1 JP 2014506041 A JP2014506041 A JP 2014506041A JP 2014506041 A JP2014506041 A JP 2014506041A JP WO2013140799 A1 JPWO2013140799 A1 JP WO2013140799A1
- Authority
- JP
- Japan
- Prior art keywords
- adhesive layer
- acid
- sensitive adhesive
- rubber
- imidafenacin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Abstract
Description
イミダフェナシンの投与剤形としては、経口固形製剤のほか、経皮吸収型製剤が提案されている(例えば特許文献1および2)。経皮吸収型製剤の場合、例えば高齢者等であってもイミダフェナシンの投与が容易である。また、経口投与などの場合において生じることもある、一時的な血中濃度の上昇を抑えることもできる。
1)支持体と、前記支持体表面に形成され、4−(2−メチル−1−イミダゾリル)−2,2−ジフェニルブチルアミド若しくは薬学的に許容されるその塩を含有するゴム系粘着剤層とを有し、前記ゴム系粘着剤層に、オレイン酸、カプリン酸、およびクロタミトンをさらに含有する経皮吸収型製剤。
2)前記ゴム系粘着剤層が、炭素数が2〜10であるカルボン酸をさらに含有する1)に記載の経皮吸収型製剤。
3)前記炭素数が2〜10であるカルボン酸が乳酸である2)に記載の経皮吸収型製剤。
4)前記ゴム系粘着剤層が、炭素数が6〜20である脂肪酸のエステルをさらに含有する1)〜3)のいずれか1つに記載の経皮吸収型製剤。
5) 前記炭素数が6〜20である脂肪酸のエステルがミリスチン酸イソプロピルである4)に記載の経皮吸収製剤。
また、本明細書において、経皮吸収型製剤とは、皮膚に貼付されて、皮膚を介して薬物を体内に吸収させる医薬の剤形をいう。皮膚を介して体内に導入された薬物は、例えば、毛細血管中に吸収され、血液の流れに従って作用部位に送達される。
さらにまた、本明細書において、粘着剤層に含まれる各成分の粘着剤層の全成分に対する割合とは、ゴム系粘着剤、イミダフェナシン、および添加剤からなる粘着剤層の全質量を基準とすることを意味している。但し、基準となる粘着剤層の全質量に、製造時において使用される場合のある有機溶媒は含まれない。
例えば、ゴム系粘着剤として、天然ゴムまたは合成ゴムを用いることができる。合成ゴムとしては、ポリイソブチレンゴム(高分子量ポリイソブチレン、低分子量ポリイソブチレンゴムまたはそれらの混合物)、シスポリイソプレンゴム、ハイシスポリイソプレンゴム、スチレン・イソプレンブロック共重合体、スチレン・イソプレン・スチレンブロック共重合体等のスチレン・イソプレン系ブロック共重合体、スチレン・ブタジエンブロック共重合体、スチレン・ブタジエン・スチレンブロック共重合体、スチレン・エチレン・ブタジエン・スチレンブロック共重合体等のスチレン−ブタジエン系ブロック共重合体等が挙げられる。
また、複数種類のゴム系高分子の混合物を、本実施形態に係るゴム系粘着剤として用いることもできる。
イミダフェナシンは、溶解型、または溶解型と非溶解型との混合のいずれで配合されていてもよい。なお、溶解型とは、粘着剤層においてイミダフェナシンが完全に溶解している状態であることをいい、詳しくは粘着剤層中にイミダフェナシンの結晶が目視または光学顕微鏡で観察されない状態をいう。一方、非溶解型とは、イミダフェナシンが結晶または非結晶の状態で粘着剤層中に存在していることをいう。溶解型であるイミダフェナシンは、皮膚を介して体内に吸収される。また、非溶解型イミダフェナシンは、直接は体内に吸収されないが、経皮吸収に伴って溶解型のイミダフェナシンが減少するに従い、溶解型に変化する。すなわち、非溶解型イミダフェナシンは、溶解型イミダフェナシンの供給源として作用する。
本実施形態の経皮吸収型製剤においては、粘着剤層に含有されるイミダフェナシンは、速やかな経皮吸収性および皮膚接着性等の品質安定性の観点から溶解型であることが好ましい。
4−(2−メチル−1−イミダゾリル)−2,2−ジフェニルブチルアミドの薬学的に許容される塩としては、例えば、塩酸塩、硫酸塩、もしくは臭化水素酸塩などの無機酸塩、またはマレイン酸塩、フマル酸塩、酢酸塩、シュウ酸塩、酒石酸塩、もしくはベンゼンスルホン酸などの有機酸塩が挙げられる。
カプリン酸は、例えば、オレイン酸と同様に、溶解剤として作用する。
また、クロタミトンは、例えば、イミダフェナシンの体内への吸収促進剤として作用する。
炭素数が2〜10であるカルボン酸の割合は、粘着剤層に配合される全成分に対して0.1〜10質量%(好ましくは1〜5質量%)とすることができる。
さらに、本実施形態の経皮吸収型製剤においては、炭素数が6〜20である脂肪酸のエステルを粘着剤層に含有することで、粘着剤層の物性を最適化できるとともに、イミダフェナシンの経皮吸収性をより高めることができる。
炭素数が6〜20である脂肪酸のエステルは、例えば、ゴム系粘着剤の粘着性を高める軟化剤として作用する。炭素数が6〜20である脂肪酸のエステルは、ミリスチン酸イソプロピル、パルミチン酸イソプロピル、またはオレイン酸オレイル等を挙げることができる。本実施形態においては、ミリスチン酸イソプロピルを用いることが好ましい。
炭素数が6〜20である脂肪酸のエステルの割合は、粘着剤層に配合される全成分に対して2〜20質量%、好ましくは5〜15質量%とすることができる。
ゴム系高分子とともに粘着付与樹脂が粘着剤層に配合される場合、粘着付与樹脂としては、ロジン、ロジンのグリセリンエステル、水素添加ロジン、水素添加ロジングリセリンエステル、ロジンのペンタエリストールエステル等のロジン誘導体、脂環族飽和炭化水素樹脂、脂肪族1系炭化水素樹脂、テルペン樹脂等が挙げられる。
具体的には、例えば、ゴム系粘着剤としてスチレン・イソプレン・スチレンブロック共重合体を用いる場合に、粘着付与樹脂として水素添加ロジングリセリンエステルを用いることができる。
例えば、本実施形態の経皮吸収型製剤は、一般にホットメルト法と称される方法や溶媒法と称される方法により製造することができる。
ホットメルト法に基づく場合は、例えば、イミダフェナシンと、添加剤と、ゴム系粘着剤との混合物(基剤成分)を熱融解させ、剥離フィルムまたは支持体に塗工して粘着剤層を形成する。続いて、形成された粘着剤層に、支持体または剥離フィルムと貼り合わせることにより、経皮吸収型製剤を得る。
また、溶媒法に基づく場合は、例えば、イミダフェナシンと、添加剤と、ゴム系粘着剤との混合物を、メタノール、エタノール、酢酸エチル、クロロホルム、またはヘキサンなどの有機溶媒に溶解させ、剥離フィルムまたは支持体上に伸展および塗工する。次に、溶媒を乾燥除去して粘着剤層を形成する。続いて、形成された粘着剤層に、支持体または剥離フィルムを貼り合わせることにより、経皮吸収型製剤を得る。
なお、粘着剤層の大きさや厚みは特に限定されず、当業者が適宜設定することができる。
本実施形態の経皮吸収型製剤を用いたイミダフェナシンの投与方法は、予防または治療対象となる疾患や、投与対象となる患者の状態に応じて適宜設定される。例えば、1日2回または1日1回の貼付を行う投与態様とすることができる。また、就寝前や必要な状況が生じる前に貼付を行う投与態様とすることもできる。
貼付部位は、特に限定されないが、例えば耳の後、腕部、下腹部等の腹部、胸部、背部、腰部、臀部または大腿部内側もしくはふくらはぎ等の脚部などである。
このように、イミダフェナシンの経皮吸収性を高めることができる結果、本実施形態の経皮吸収型製剤によれば、例えば、イミダフェナシンを、皮膚を介して循環血中に効率よく吸収させることができる。また、経口投与の場合に見られる急激な血中濃度の上昇に伴って起こり得る副作用も回避することができる。したがって、本実施形態の経皮吸収型製剤は、過活動膀胱(OAB)に伴う頻尿・尿失禁、喘息、COPDまたはIBS等の予防および/または治療薬として大変有用である。
予め量り取った4−(2−メチル−1−イミダゾリル)−2,2−ジフェニルブチルアミド0.5gにクロロホルム37.5gを加え攪拌溶解し、イミダフェナシン溶液を得た。得られたイミダフェナシン溶液にスチレン・イソプレン・スチレンブロック共重合体3.71g、水素添加ロジングリセリンエステル4.0g、ミリスチン酸イソプロピル1.0g、オレイン酸0.5g、カプリン酸0.09g、クロタミトン0.1g、乳酸0.1gを加え、攪拌溶解して粘着層液を調製した。当該粘着層液を、支持体であるScotchpak#9742のポリエステル面に、調厚目盛を10に設定し、ベーカー式アプリケーターを用いて展延した。粘着層液を展延したScotchpak#9742を室温で15分間乾燥後、乾燥温度を60℃に設定したISUZU BEST DRYING内で約15分間乾燥し、粘着剤層を形成させた。形成された粘着剤層の、使用時において皮膚に当接する面(粘着面)をScotchpak#9742のフッ素ポリマー面で覆い、経皮吸収型製剤とした。
含有される成分の割合を変更したほかは、実施例1と同様の方法により、実施例2、および比較例1〜14の経皮吸収型製剤を調製した。実施例および比較例において粘着剤層に含まれる成分の量を図1に示す。
ヘアレスラットをエーテル麻酔下で腹部皮膚を摘出し、真皮側の脂肪を除去した後、横型拡散セル(有効拡散面積:0.95 cm2,セル容積:3 mL)に装着した。次に、セルに装着された皮膚の角質層側に、実施例および比較例の各経皮吸収型製剤を貼付した。また、皮膚の真皮層側に位置するセルには、0.01Mリン酸緩衝液(pH.7.4,0.85%塩化ナトリウムを含む。以下、レセプター液とも称す)を注入した。経時的にレセプター液の一部(500 μL)をサンプリングした。その際、0.01Mリン酸緩衝液(pH.7.4,0.85%塩化ナトリウムを含む)500 μLをセルに補充した。サンプリングしたレセプター液中の イミダフェナシン濃度を、以下の測定条件で、HPLC(High Performance Liquid Chromatography)法により測定した。
注入量 : 20μL
検出器 : 紫外吸光光度計(測定波長:220nm)
カラム : Inertsil ODS-2,4.6mm×15cm,5μm ,ジーエルサイエンス製
カラム温度 :30℃
移動相 : 薄めたリン酸(1→100)0.005M 1‐オクタンスルホン酸ナトリウム溶液:アセトニトリル(7:3)
流量 : 約1.0mL/min (イミダフェナシンの保持時間約7min)
(FLUX : 貼付後、製剤1cm2の面積から経皮吸収する1時間あたりの経皮薬物吸収量)
実施例のFLUX値は、実施例1が6.3μg/cm2/hour及び実施例2が5.3μg/cm2/hourである一方、比較例は最も高いFLUX値でも4.3μg/cm2/hourであった(比較例9)。
実施例1〜2の経皮吸収型製剤は、比較例の経皮吸収型製剤と比較して、いずれも高いイミダフェナシンの経皮吸収性を示した。特に、オレイン酸、カプリン酸及びクロタミトンに加えて乳酸を含有する実施例1の経皮吸収型製剤において、他の実施例よりもさらに高い経皮吸収性が確認された。
Claims (5)
- 支持体と、
前記支持体の表面に形成され、4−(2−メチル−1−イミダゾリル)−2,2−ジフェニルブチルアミドまたは薬学的に許容可能なその塩を含有するゴム系粘着剤層と、を有し、
前記ゴム系粘着剤層は、オレイン酸、カプリン酸およびクロタミトンをさらに含有する経皮吸収型製剤。 - 前記ゴム系粘着剤層が、炭素数が2〜10であるカルボン酸をさらに含有する請求項1に記載の経皮吸収型製剤。
- 前記炭素数が2〜10であるカルボン酸が乳酸である請求項2に記載の経皮吸収型製剤。
- 前記ゴム系粘着剤層が、炭素数が6〜20である脂肪酸のエステルをさらに含有する請求項1〜3のいずれか1つに記載の経皮吸収型製剤。
- 前記炭素数が6〜20である脂肪酸のエステルがミリスチン酸イソプロピルである請求項4に記載の経皮吸収製剤。
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JP4524502B2 (ja) * | 2008-01-31 | 2010-08-18 | 杏林製薬株式会社 | イミダフェナシン含有口腔内速崩壊性錠剤 |
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JPH0543457A (ja) * | 1991-08-08 | 1993-02-23 | Sekisui Chem Co Ltd | 経皮吸収製剤 |
WO1996015793A1 (fr) * | 1994-11-17 | 1996-05-30 | Toray Industries, Inc. | Preparation absorbable par voie percutanee |
WO2000061120A1 (fr) * | 1999-04-13 | 2000-10-19 | Hisamitsu Pharmaceutical Co., Inc. | Préparations destinées à être absorbées par voie percutanée |
WO2006082888A1 (ja) * | 2005-02-03 | 2006-08-10 | Kyorin Pharmaceutical Co., Ltd. | 経皮吸収型製剤 |
WO2006118173A1 (ja) * | 2005-04-28 | 2006-11-09 | Ono Pharmaceutical Co., Ltd. | 経皮吸収製剤 |
Also Published As
Publication number | Publication date |
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EP2829272B1 (en) | 2017-05-03 |
EP2829272A1 (en) | 2015-01-28 |
EP2829272A4 (en) | 2015-11-11 |
KR101998451B1 (ko) | 2019-07-09 |
US20150064232A1 (en) | 2015-03-05 |
TW201400149A (zh) | 2014-01-01 |
US9457012B2 (en) | 2016-10-04 |
WO2013140799A1 (ja) | 2013-09-26 |
JP6104230B2 (ja) | 2017-03-29 |
TWI569815B (zh) | 2017-02-11 |
KR20140138925A (ko) | 2014-12-04 |
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