JP5597829B2 - 経皮吸収製剤 - Google Patents
経皮吸収製剤 Download PDFInfo
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- JP5597829B2 JP5597829B2 JP2009156166A JP2009156166A JP5597829B2 JP 5597829 B2 JP5597829 B2 JP 5597829B2 JP 2009156166 A JP2009156166 A JP 2009156166A JP 2009156166 A JP2009156166 A JP 2009156166A JP 5597829 B2 JP5597829 B2 JP 5597829B2
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- tape
- weight
- transdermal absorption
- absorption preparation
- sensitive adhesive
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Description
上記テープ型経皮吸収製剤、バッチ型経皮吸収製剤、パップ型経皮吸収製剤等は、一般に、基剤に薬剤成分を溶解分散して得られる組成物を支持シートの一面に積層したものである。テープ製剤の粘着性組成物として、アクリル系共重合体に多価アルコールを加えた組成物が有効なことはすでに知られている(特許文献5)。
ビスフォスフォネートを経皮投与すると、薬剤の経皮吸収性の増大とともに皮膚の遅延性の皮膚炎症が認められた。本発明者らの実験によると、製剤貼付後24時間ではがした場合、皮膚の赤みの増大、水泡の発生といった皮膚炎症が認められたが、この副作用は剥した直後でなく剥してから2日目(48時間後)が最も激しかった。
該粘着剤組成物の組成が該アクリル系共重合体100重量部に対し該多価アルコール50〜800重量部であることを特徴とする。
さらに、大豆レシチン、BHT、BHA、ビタミンE及びその誘導体、ベンゾトリアゾール、没食子酸プロピル、メルカプトベンズイミダゾールが皮膚刺激低減に最も効果があった。
上記極性モノマーとしては、例えば、N−ビニル−2−ピロリドン、アクリル酸2−ヒドロキシエチル、アクリルアミド等が挙げられ、N−ビニル−2−ピロリドンが好ましい。これらは単独で用いられても併用してもよい。
上記水溶性樹脂としては、例えば、ヒドロキシエチルセルロース、ヒドロキシプロピルメチルセルロース、カルボキメチルシスターチ、などの半合成ポリマー、ポリビニルアルコール、ポリアクリルアミド、などの合成ポリマーが挙げられる。
粘着剤Aの合成
パラオキシ硫酸カリウムとピロ亜硫酸カリウムの2:1混合物0.3gを30mlの水に溶解して触媒水溶液を得た。攪拌機付きの3000mlの反応容器に、水−アセトン1:1(容積比)の混合溶媒2000ml、アクリル酸500g、アクリル酸2−エチルヘキシル60g及びN−ビニル−2−ピロリドン60gを仕込み、攪拌及び窒素置換をしつつ温度を上昇させた。温度が75℃になった時に前記触媒水溶液10mlを添加して重合を開始した。その後、2時間間隔で前記触媒水溶液4mlづつ添加した。温度を75℃に保ちつつ重合を進め計10時間で重合を終了して粘着剤A溶液を得た。
得られた粘着剤A100gにアルミニウムアセチルアセトネートのTHF溶液を粘着剤固形分100gに対しアルミニウムアセチルアセトネートが0.15gになるように添加して架橋された粘着剤B溶液を得た。
攪拌機付きの500ml反応容器に、酢酸エチル300g、アクリル酸2−エチルヘキシル90g、アクリル酸10g及びアゾビスイソブチロニトリル0.005gを仕込み、反応容器内を窒素置換した後、75℃で15時間重合を行って粘着剤C(固形分25重量%)溶液を得た。
表1に示した所定量(重量部)の粘着剤A〜C溶液、多価アルコール及び酸化防止剤各種とを混合した後、表1に示した所定量(重量部)のアレンドロネート、インガドロネート、を10重量部の水に溶解した溶液を添加し、次いで、厚さ40μmのポリエステルフィルムに塗布乾燥して厚さ100μmの粘着剤層が積層されたテープ型経皮吸収製剤を得た。
ポリアクリル酸(8g)(分子量25万、和光純薬製)、グリセリン(30g)、水酸化アルミニウム(0.1g)、酒石酸(0.15g)、水(62g)、アレンドロネート(1g)、BHT(0.3g)を均一に攪拌した。得られた攪拌物を、ポリエステル製の不織布(日本バイリーン株式会社製貼付薬用基布)に塗布展延した後、塗布面にポリプロピレンフィルムを貼りあわせ、所定の大きさに裁断して試験片とした。
得られた製剤より直径2cmの円形部分を打ち抜き、粘着性の有無、表面ブリード性などを観察し、粘着性製剤としての適否を判断した。この試験で不適となった製剤に関しては以下の試験を実施しなかった。
ひと皮膚を37℃の水を循環させたフランツ型拡散セルに挟み、レシーバー(真皮)側にPBS緩衝溶液(pH7.4)を供給し、マグネティックスターラーにより攪拌した。ドナー(角質)側には得られた経皮吸収製剤を適用し、透過試験を行った。4時間後、8時間後及び24時間後にレシーバー中の混合液を採取して、その中の薬物濃度を高速液体クロマトグラフ(HPLC)により測定し、皮膚を透過した累積薬物量を求めた。
ウイスター系雄性ラット(体重240−280g)の腹部をシェイバーで除毛し、テープ型経皮吸収製剤を直径2cmの円形に打抜き腹部に貼付し、その上をガムテープで固定した。24時間後にテープを剥離した。剥離後48時間後の皮膚刺激性をドレイツの判定基準に従って評価した。表2中の数値は3個体の平均値である。
ドレイツの判定基準の評点は次の通りである。0:紅斑なし、1:非常に軽度な紅斑、2:はっきりした紅斑、3:中程度ないし高度紅斑、4:高度紅斑からわずかな痂皮。
実施例11のパップ剤についても同様である。
Claims (8)
- 医薬的に有効量のビスフォスフォネートと、
酸化防止剤と、
アクリル酸を50重量%以上含むアクリル系共重合体と多価アルコールからなる粘着剤組成物と、
を混和してなる粘着性組成物を用いた粘着剤層が支持シートの一面に積層されており、
該粘着剤組成物の組成が該アクリル系共重合体100重量部に対し該多価アルコール50〜800重量部であることを特徴とするテープ型経皮吸収製剤。 - 上記酸化防止剤が、亜硝酸ナトリウム、亜硝酸水素ナトリウム、大豆レシチン、メチオニン、グリチルレチン酸、ジブチルヒドロキシトルエン(BHT)、ブチルヒドロキシアニソール(BHA)、ビタミンE、ビタミンC、ベンゾトリアゾール、没食子酸プロピル、メルカプトベンズイミダゾールからなる群より選ばれた1種以上の酸化防止剤であることを特徴とする請求項1に記載のテープ型経皮吸収製剤。
- 上記酸化防止剤が、大豆レシチン、BHT、BHA、ビタミンE、ベンゾトリアゾール、没食子酸プロピル、メルカプトベンズイミダゾールのいずれかであることを特徴とする請求項1に記載のテープ型経皮吸収製剤。
- 上記アクリル系共重合体の組成が、アクリル酸50〜100重量%、アクリル酸2−エチルヘキシル0〜40重量%及び極性モノマー(アクリル酸を除く)0〜40重量%である請求項1〜3のいずれか1項に記載のテ−プ型経皮吸収製剤。
- 上記粘着性組成物中のビスフォスフォネートの濃度が0.1〜10重量%である請求項1〜4のいずれか1項に記載のテ−プ型経皮吸収製剤。
- 上記極性モノマーが、N−ビニル−2−ピロリドン、酢酸ビニル、アクリル酸メトキシエチル及びアクリル酸2−ヒドロキシエチルからなる群より選ばれた1種以上の極性モノマーであることを特徴とする請求項4又は請求項5に記載のテープ型経皮吸収製剤。
- 上記多価アルコールが、グリセリン、ジグリセリン、プロピレングリコール、ブチレングリコール、ポリエチレングリコール及びポリプロピレングリコールからなる群より選ばれた1種以上の多価アルコールであることを特徴とする請求項4又は請求項5に記載のテープ型経皮吸収製剤。
- 上記アクリル系共重合体が、アルミニウムアセチルアセトネート、水酸化アルミニウムゲル及びアルミニウムグリシネートからなる群より選ばれた1種以上の金属キレート架橋剤により架橋されていることを特徴とする請求項1〜7のいずれか1項に記載のテープ型経皮吸収製剤。
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