JP5800417B2 - 外用貼付剤 - Google Patents
外用貼付剤 Download PDFInfo
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- JP5800417B2 JP5800417B2 JP2011154102A JP2011154102A JP5800417B2 JP 5800417 B2 JP5800417 B2 JP 5800417B2 JP 2011154102 A JP2011154102 A JP 2011154102A JP 2011154102 A JP2011154102 A JP 2011154102A JP 5800417 B2 JP5800417 B2 JP 5800417B2
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- loxoprofen sodium
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Description
したがって、本発明により、高い主薬の安定性を備えた、ロキソプロフェンナトリウム含有外用貼付剤を提供することが可能となったものである。
製剤中のロキソプロフェンナトリウム含量が0.1重量%未満であると経皮吸収性が不十分であり、また、10重量%を超えると貼付剤の物性を損なうばかりか、経済的にも不利であり好ましいものではない。
SIS(クインタック3570C;日本ゼオン)、脂環族飽和炭化水素樹脂(アルコンP−100;荒川化学工業)、ポリブテン(HV−300F;JX日鉱日石エネルギー)、流動パラフィン(ハイコールM−352;カネダ)、BHT(ジブチルヒドロキシトルエン)の各成分を窒素雰囲気下、加熱攪拌して溶解した。次いで、主薬であるロキソプロフェンナトリウム、L−メントール、乳酸、アルミニウムグリシネートを前記粘着剤中に添加し、さらに撹拌混合し、粘着剤を調製した。
調製された粘着剤を、シリコン処理されたポリエチレンテレフタレートフィルム上に塗工し、厚さ約150μmの粘着剤層を形成した。得られた粘着剤層に支持体としてのポリエステル製織布にラミネートし、本発明の外用貼付剤を得た。各成分の配合量は下記表1に示した。
下記表1に示す組成により、実施例と同様の製法に従い、比較例1〜2の各外用貼付剤を得た。
上記で得た実施例と比較例1〜2の製剤について、60℃の保存温度条件下で保存し、0、1、および3ヶ月の各保存期間における保存試料(製剤)中の分解生成物量(生成量%)を測定した。
試料の調製法及びHPLC測定条件を下記に示す。
なお、有機酸由来の分解生成物として、下記に示すHPLC測定条件において、ロキソプロフェンナトリウムの保持時間を1としたときの、相対保持時間1.55〜1.60に検出される分解生成物(以下、分解生成物1と称す)、および相対保持時間1.65〜1.70に検出される分解生成物(以下、分解生成物2と称す)について、その生成量を測定した。
分解生成物1の定量結果を図1に、分解生成物2の定量結果を図2にそれぞれ示す。
各製剤を5×7cm2サイズに打ち抜き、テトラヒドロフラン(以下、THFと称す)を添加し、超音波抽出及び振とう機による抽出を行った。得られた抽出液をTHFで100mLとし、抽出液とした。この抽出液3mLをとり、40%アセトニトリルを用いて50mLにメスアップし、メンブランフィルター(0.45μm)を用い、ろ過を行ない、得られた液を供試試料とした。
カラム:Unison UK−C18(3×150mm)
移動相:アセトニトリル:水:リン酸=400:600:1
流速 :0.5mL/分
波長 :223nm
注入量:10μL
以下に、上記の実施例に示した本発明の外用貼付剤以外の具体的製剤例1〜9を、下記表2および表3に示した。なお単位は重量%である。
但し、本発明はこれに限定されるものではない。
本発明が提供する外用貼付剤は、例えば、変形性関節症、慢性関節リウマチ、腰痛症、肩関節周囲炎、腱鞘炎、腱周囲炎、上腕骨上顆炎(テニス肘等)、筋肉痛、外傷後の腫脹・疼痛などの予防、治療に有用である。
Claims (2)
- ロキソプロフェンナトリウムと、乳酸、およびアルミニウムグリシネートを含有することを特徴とする外用貼付剤。
- 前記アルミニウムグリシネートの配合量が、0.001〜5重量%である請求項1に記載の外用貼付剤。
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