JPWO2019017266A1 - リバスチグミン含有経皮吸収型製剤 - Google Patents
リバスチグミン含有経皮吸収型製剤 Download PDFInfo
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- JPWO2019017266A1 JPWO2019017266A1 JP2019530996A JP2019530996A JPWO2019017266A1 JP WO2019017266 A1 JPWO2019017266 A1 JP WO2019017266A1 JP 2019530996 A JP2019530996 A JP 2019530996A JP 2019530996 A JP2019530996 A JP 2019530996A JP WO2019017266 A1 JPWO2019017266 A1 JP WO2019017266A1
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- nitrogen
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- rivastigmine
- rubber
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- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- GVJHHUAWPYXKBD-IEOSBIPESA-N α-tocopherol Chemical class OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-IEOSBIPESA-N 0.000 description 1
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Abstract
Description
[1]リバスチグミン、ゴム系高分子、粘着付与樹脂、及び窒素含有基を有する高分子化合物を含有することを特徴とする経皮吸収型製剤。
[2]前記窒素含有基は、第1級、第2級、または第3級アミノ基、イミノ基、イミド基、アミド基、及び第4級アンモニウム基よりなる群から選択される1種以上である上記[1]に記載の経皮吸収型製剤。
[3]前記窒素含有基を有する高分子化合物は、
前記窒素含有基を有する(メタ)アクリル系モノマー若しくは前記窒素含有基を有するビニル系モノマーの重合体またはこれらの共重合体、または前記モノマーの少なくとも1種と前記窒素含有基を有しない(メタ)アクリル系モノマーとの共重合体、または
ポリビニルアルコールとモノまたはジアルキルアミノアセテートとの縮合体である上記[1]または[2]に記載の経皮吸収型製剤。
[4]前記窒素含有基を有する高分子化合物は、アミノアルキルメタクリレートコポリマーEである上記[1]に記載の経皮吸収型製剤。
[5]前記ゴム系高分子は、スチレン・イソプレン・スチレ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・ブチレン・スチレンブロック共重合体、スチレンイソプレンゴム、ポリイソプレンゴム、スチレンブタジエンゴム、クロロプレンゴム、液状ゴム、天然ゴムラテックス、合成ラテックス、ポリブテン、ポリイソプレン、ポリブチレン、及びポリイソブチレンよりなる群から選択される1種以上である上記[1]〜[4]のいずれかに記載の経皮吸収型製剤。
[6]更にセルロース誘導体を含有する上記[1]〜[5]のいずれかに記載の経皮吸収型製剤。
[7]前記セルロース誘導体は、カルボキシメチルセルロース、カルメロースナトリウム、メチルセルロース、エチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、及びヒドロキシプロピルメチルセルロースよりなる群から選択される1種以上である上記[6]に記載の経皮吸収型製剤。
[8]前記経皮吸収型製剤における前記リバスチグミンの含有量は、5質量%以上、30質量%以下である上記[1]〜[7]のいずれかに記載の経皮吸収型製剤。
[9]前記経皮吸収型製剤における前記窒素含有基を有する高分子化合物の含有量は、1質量%以上、20質量%以下である上記[1]〜[8]のいずれかに記載の経皮吸収型製剤。
[10]前記リバスチグミンの含有量に対する前記窒素含有基を有する高分子化合物の含有量の質量比は0.05以上、4以下である上記[1]〜[9]のいずれかに記載の経皮吸収型製剤。
(i)リバスチグミンは常温で液体であるため製剤中で可塑剤の働きをすること。
(ii)ヒトに対し1日1回の貼付で治療に必要な量のリバスチグミンを投与しようとすると、製剤1枚当たり、比較的高濃度のリバスチグミンを配合する必要性があること。
(iii)リバスチグミンは経皮吸収性が高い薬物であり、患者への貼付中に、比較的多量の薬物が経時的に体内に吸収されるために、貼付直後と剥離直前では製剤中の薬物含有量の差が非常に大きいこと。
スチレン・イソプレン・スチレンブロック共重合体19g、液状ポリイソプレンゴム14g、脂環族飽和炭化水素樹脂(アルコンP100)33g、水添ロジングリセリンエステル17gを適量のトルエンに混合溶解させ、粘着基剤溶液を得た。リバスチグミン12gにアミノアルキルメタクリレートコポリマーE5gを溶解させた後、粘着基剤溶液を添加し均一になるまで撹拌混合して、得られた粘着剤溶液を剥離層(PETフィルム)上に伸展して、溶媒を乾燥除去させ、厚さ150μmの粘着層を形成した。次いで、支持体(PETフィルム)を貼り合わせることにより貼付剤を得た。表1に各成分の含有量を示す。
粘着基剤溶液と共にヒドロキシプロピルメチルセルロースを添加したこと、及び各成分の含有量を表1に示す含有量とし、粘着層の厚さを表1に示す厚さとしたこと以外は、実施例1と同様の製法により実施例2〜7の貼付剤を得た。
アミノアルキルメタクリレートコポリマーEを添加しなかったこと、及び各成分の含有量を表1に示す含有量としたこと以外は、実施例1と同様の製法により比較例1の貼付剤を得た。
アミノアルキルメタクリレートコポリマーEの代わりに、アクリル系粘着剤であるアクリル酸2−エチルヘキシル・酢酸ビニル・アクリル酸2−ヒドロキシエチルコポリマー(Duro−tak 87−4287)を用いたこと以外は、実施例5と同様の製法により比較例2の貼付剤を得た。
アミノアルキルメタクリレートコポリマーEの代わりに、賦形剤であるメタクリル酸ブチル・メタクリル酸メチルコポリマー(Plastoid B)を用いたこと以外は、実施例5と同様の製法により比較例3の貼付剤を得た。Plastoid Bは、アミノアルキルメタクリレートコポリマーEと同様に常温固体であり、コーティング剤または結合剤として使用されている高分子の一つである。
スチレン・イソプレン・スチレンブロック共重合体15g、流動パラフィン28gを適量のトルエンに混合溶解させ、粘着基剤溶液を得た。粘着基剤溶液にリバスチグミン7gを添加し均一になるまで撹拌混合して、得られた粘着剤溶液を剥離層(PETフィルム)上に伸展して、溶媒を乾燥除去させ、乾燥後の粘着層中のリバスチグミン含量が1.8mg/cm2となるように厚さ128.6μmの粘着層を形成した。次いで、支持体(PETフィルム)を貼り合わせることにより比較例5の貼付剤を得た。なお、比較例5は、特許文献1(国際公開2013/187451号)の実施例3を参考にして作製した。
スチレン・イソプレン・スチレンブロック共重合体19.5g、脂環族飽和炭化水素樹脂(アルコンP100)18g、ポリブテン5.5gを適量のトルエンに混合溶解させ、粘着基剤溶液を得た。リバスチグミン7gに粘着基剤溶液を添加し均一になるまで撹拌混合して、得られた粘着剤溶液を剥離層(PETフィルム)上に伸展して、溶媒を乾燥除去させ、乾燥後の粘着層中のリバスチグミン含量が1.2mg/cm2となるように厚さ85μmの粘着層を形成した。次いで、支持体(PETフィルム)を貼り合わせることにより比較例6の貼付剤を得た。なお、比較例6は、特許文献2(特表2014−508728号公報)の実施例1を参考にして作製した。
実施例1〜7及び比較例1〜3、5、6の粘着力を比較するために、プローブタック試験を実施した。まず、各実施例及び各比較例の製剤を直径14mmの円形に裁断したものを試験製剤とした。次いで、レオメーターの試料台上に両面テープを貼り、PETフィルムを上に向けて試験製剤を試料台上に貼り付けた。その後、ステンレス製円板状プローブ(直径5mm)を感圧軸取付け部に取り付けた後、試験製剤からPETフィルムを剥がし、試料台を10mm/分の速度で上昇させた。最終的に粘着面をプローブに50gの力で接触させて10秒間静止した後、引き離すのに要した力を測定し、タック力(g)とした。その結果を表1に示す。
実施例1〜7及び比較例1〜3、5、6の粘着性を官能的に評価するために、指タック試験を実施した。詳細には、粘着層面に指を押し当て、指を引き離した時の粘着性(貼り付きの強さ)を評価した。貼り付きの強さが強いものを優(○)、貼り付きの強さが中程度のものを良(△)、貼り付きの強さが弱いものを不良である(×)と評価した。その結果を表1に示す。
実施例5及び比較例4(市販のリバスチグミン含有貼付剤(イクセロン(登録商標)パッチ))におけるリバスチグミンの経皮吸収性を検討するため、インビトロ皮膚透過性試験を行った。まず白人男性の背部摘出皮膚を厚みが750μmになるよう処理した後、フランツ型拡散セルにセットし、直径14mmの円形に裁断した各製剤を貼付した。レセプター側にはリン酸緩衝生理食塩水(pH7.5)を満たし、ウォータージャケットには、37℃の温水を還流した。経時的にレセプター液をサンプリングし、皮膚を透過したリバスチグミン量を液体クロマトグラフ法により測定した。その測定結果より、試験開始24時間後の累積薬物透過量(μg/cm2)、及び薬物吸収速度の最大値(flux:μg/cm2/時間)を算出した。その結果を表2に示す。
Claims (10)
- リバスチグミン、ゴム系高分子、粘着付与樹脂、及び窒素含有基を有する高分子化合物を含有することを特徴とする経皮吸収型製剤。
- 前記窒素含有基は、第1級、第2級、または第3級アミノ基、イミノ基、イミド基、アミド基、及び第4級アンモニウム基よりなる群から選択される1種以上である請求項1に記載の経皮吸収型製剤。
- 前記窒素含有基を有する高分子化合物は、
前記窒素含有基を有する(メタ)アクリル系モノマー若しくは前記窒素含有基を有するビニル系モノマーの重合体またはこれらの共重合体、または前記モノマーの少なくとも1種と前記窒素含有基を有しない(メタ)アクリル系モノマーとの共重合体、または
ポリビニルアルコールとモノまたはジアルキルアミノアセテートとの縮合体である請求項1または2に記載の経皮吸収型製剤。 - 前記窒素含有基を有する高分子化合物は、アミノアルキルメタクリレートコポリマーEである請求項1に記載の経皮吸収型製剤。
- 前記ゴム系高分子は、スチレン・イソプレン・スチレ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・ブチレン・スチレンブロック共重合体、スチレンイソプレンゴム、ポリイソプレンゴム、スチレンブタジエンゴム、クロロプレンゴム、液状ゴム、天然ゴムラテックス、合成ラテックス、ポリブテン、ポリイソプレン、ポリブチレン、及びポリイソブチレンよりなる群から選択される1種以上である請求項1〜4のいずれかに記載の経皮吸収型製剤。
- 更にセルロース誘導体を含有する請求項1〜5のいずれかに記載の経皮吸収型製剤。
- 前記セルロース誘導体は、カルボキシメチルセルロース、カルメロースナトリウム、メチルセルロース、エチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、及びヒドロキシプロピルメチルセルロースよりなる群から選択される1種以上である請求項6に記載の経皮吸収型製剤。
- 前記経皮吸収型製剤における前記リバスチグミンの含有量は、5質量%以上、30質量%以下である請求項1〜7のいずれかに記載の経皮吸収型製剤。
- 前記経皮吸収型製剤における前記窒素含有基を有する高分子化合物の含有量は、1質量%以上、20質量%以下である請求項1〜8のいずれかに記載の経皮吸収型製剤。
- 前記リバスチグミンの含有量に対する前記窒素含有基を有する高分子化合物の含有量の質量比は0.05以上、4以下である請求項1〜9のいずれかに記載の経皮吸収型製剤。
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