JP2008069159A - 持続放出ラノラジン製剤 - Google Patents
持続放出ラノラジン製剤 Download PDFInfo
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- JP2008069159A JP2008069159A JP2007243731A JP2007243731A JP2008069159A JP 2008069159 A JP2008069159 A JP 2008069159A JP 2007243731 A JP2007243731 A JP 2007243731A JP 2007243731 A JP2007243731 A JP 2007243731A JP 2008069159 A JP2008069159 A JP 2008069159A
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- ranolazine
- plasma
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- hours
- sustained release
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Abstract
【解決手段】持続放出ラノラジン製剤が、ラノラジンと、pH4.5以下の水性媒体ではほとんど不溶でpH4.5以上の水性媒体では溶性であるフィルムを形成するように、部分的に中和したpH依存的結合剤の密接な混合物を含む。本製剤は、1日2回のラノラジン投与に適し、ラノラジンの溶解速度を制御してヒト血漿中ラノラジンレベルを850〜4000ng/mLに維持するために有用である。
【選択図】なし
Description
本出願は、1999年5月27日に提出された、同時係属中の米国特許出願番号09/321,522号の一部継続出願であり、これは、1998年9月10日に提出された米国仮特許出願番号60/099804号の優先権を主張する。
本発明は、経口投与する持続放出ラノラジン投与製剤を使用して、ヒト血漿中ラノラジンレベルを治療レベルに維持する方法に関する。
米国特許第4,567,264号(この明細書は本願に参照として組み込む)は、ラノラジン、(±)−N−(2,6−ジメチルフェニル)−4−[2−ヒドロキシ−3−(2−メトキシフェノキシ)−プロピル]−1−ピペラジンアセトアミド、およびその医薬的に許容される塩、並びに、不整脈、異型および運動誘発狭心症、および心筋梗塞を含む心血管疾患の治療におけるその使用を開示する。
第一の態様において、本発明は、製剤の大半が活性ラノラジンからなる、持続放出ラノラジン製剤である。
「ラノラジン」は、化合物(±)−N−(2,6−ジメチルフェニル)−4−[2−ヒドロキシ−3−(2−メトキシフェノキシ)プロピル]−1−ピペラジン−アセトアミド、またはそのエナンチオマーである(R)−(+)−N−(2,6−ジメチルフェニル)−4−[2−ヒドロキシ−3−(2−メトキシフェノキシ)−プロピル]−1−ピペラジンアセトアミドおよび(S)−(−)−N−(2,6−ジメチルフェニル)−4−[2−ヒドロキシ−3−(2−メトキシフェノキシ)−プロピル]−1−ピペラジンアセトアミドおよびその医薬的に許容される塩、並びにそれらの混合物である。特記しない限り、明細書および実施例で使用した血漿中ラノラジン濃度は、ラノラジン遊離塩基を意味する。
(i)疾患の素因があり得るが、疾患に罹患しているとはまだ診断されていない、被検者に発生する疾患を予防する;
(ii)疾患を阻止、すなわちその発達を抑止する;または
(iii)疾患を寛解、すなわち疾患の退行を引き起こすこと、
を含む。
ANOVA=分散分析
ATP=アデノシン三リン酸
ECG=心電図
ETT=運動トレッドミル試験
PDH=ピルビン酸デヒドロゲナーゼ
Cmax=最大濃度
Ctrough=IR製剤の投与8時間後および実施例2のSR製剤A〜Cの投与12時間後における残留濃度
tid=1日3回
bid=1日2回
Cx=時間xにおける濃度
Tmax=最大濃度までの時間
AUCx=x時間後または時間間隔における曲線下面積
本実施例は、即時放出(IR)ラノラジン製剤の調製法を記載する。ラノラジン二塩酸塩(4000g)、微結晶セルロース(650g)、ポリビニルピロリドン(100g)、およびクロスカルメロースナトリウム(100g)粉末を、Fielder PMA65混合−造粒機中で共に密接に混合し、その後、十分な水を混合しながら加え、顆粒を形成した。顆粒を、Aeromatic Strea-5流動床乾燥機中で乾燥し、ステアリン酸マグネシウム(100g)と混合した。混合物を硬ゼラチンカプセルに、1カプセルあたり例えば500mgの充填重量となるまで充填し、1カプセルあたり400mgのラノラジン二塩酸塩(342mgのラノラジン遊離塩基に相当)の投与量を得たが、30から400mgのラノラジン二塩酸塩の充填重量となるように充填してもよい。
本実施例は、持続放出(SR)ラノラジン製剤の調製法を記載する。
本実施例は、ラノラジンは、実施例1のIR製剤として投与した場合、抗狭心症剤および抗虚血剤としては無効であることを実証した、Circulation 90: 726〜734(1994)に発表した研究を要約する。
本実施例では、狭心症患者の大きな群における高い血漿中ラノラジンレベルの安全性および抗虚血効果を評価し、1日2回および1日3回の処方計画による定常状態投与中の、任意の効果の持続時間を評価した。本実施例では、従来の抗狭心症薬に応答性の慢性な安定狭心症患者を、3つのラノラジン・2HCl投与処方:1日3回267mg、1日2回400mg、および1日3回400mgの実施例1のIR製剤で処置した。血漿中ピークおよびトラフレベルにおける、運動試験パラメータおよびラノラジン遊離塩基濃度を決定した。
試験は、4つの処置(プラセボ、ラノラジン・2HCl 400mg1日2回、ラノラジン・2HCl 267mg1日2回、およびラノラジン・2HCl 400mg1日3回)による二重盲検プラセボ対照無作為処置相、4つの処置順序、および、既知の抗狭心症療法に応答性であり、安定な運動時間を有する、予め認定された患者に対する期間の延長されたラテン方格デザインにおける5つの二重盲検処置期間を含んだ。
I.インビトロでのIR製剤とSR製剤の比較
実施例1に従って調製したIR製剤および実施例2A〜2Cに従って調製したSR製剤を、胃での溶解をシミュレートするために溶解液として0.1M塩酸900mLを使用し、USP装置2溶解テスター中で試験した。
II.インビボでのIR製剤とSR製剤A、B、およびCの比較
実施例1に従って調製したIR製剤の1回投与量および実施例2に従って調製したSR製剤AおよびBを、11人の健康なボランティアに投与し、ラノラジン遊離塩基のその血漿中濃度を、投与の0、20、40、60、90および120分後、1時間毎に6時間まで、1時間に2回18時間まで、および24時間後に測定した(SR製剤のみ)。結果を以下の表5に示す。
本実施例は、実施例2Dのラノラジン塩基SR製剤の単回経口投与量の安全性および薬物動態プロファイルを評価する、単一漸増投与量のクロスオーバーデザイン試験を詳述する。ヒト被検者を3つの群に分けた。1群は、500、750および1000mgのラノラジンSRを受けた。2群は、1250および1750mgのラノラジンSRを受けた。3群は、1500および2000mgのラノラジンSRを受けた。各群はまた、無作為プラセボ相も有した。ラノラジンSRの単回経口投与量後の、平均薬物動態パラメータを以下の表6に詳述する。
本実施例は、1日2回投与を評価するための、二重盲検でプラセボ対照の複数の漸増投与量のクロスオーバーデザインされたボランティア試験を詳述する。6人の被検者が、500、750、および1000mgで1日2回、実施例2Dに従って調製したラノラジンSR製剤の投与を4日間受け、続いて5日目に朝の投与量を受けた。薬物動態結果を以下の表7に報告する。
本実施例は、実施例2Dのようなラセミラノラジン遊離塩基製剤を投与することの安全性および耐容性を評価した。ラセミラノラジンおよびそのエナンチオマーである(R)−(+)−N−(2,6−ジメチルフェニル)−4−[2−ヒドロキシ−3−(2−メトキシフェノキシ)−プロピル]−1−ピペラジンアセトアミド、(S)−(−)−N−(2,6−ジメチルフェニル)−4−[2−ヒドロキシ−3−(2−メトキシフェノキシ)−プロピル]−1−ピペラジンアセトアミドの、ヒト血漿中での個々および平均の濃度も決定した。
安定狭心症におけるラノラジンの単独療法評価(MARISA)
MARISAは、安定狭心症における持続放出ラノラジン(SR)の最初の試験である。
Claims (10)
- 1回の投与あたり2個以下の錠剤で、少なくとも50重量%のラノラジンを含む持続放出医薬投与形をヒト患者に投与して、ここでの該投与量は、24時間におよび1回、2回および3回から選択した頻度で投与する、ヒト患者の血漿中ラノラジンレベルを少なくとも24時間最小850ng塩基/mLに維持することにより、不整脈、異型および運動誘発狭心症、および心筋梗塞から選択した心血管疾患に罹患しているヒト患者を治療するための方法。
- 血漿中ラノラジン最大レベルは約4000ng塩基/mLである、請求項1の方法。
- 医薬投与形は、ヒト患者に、24時間におよび1回および2回から選択した頻度で投与する、請求項1の方法。
- 医薬投与形は、ヒト患者に、24時間におよび2回投与量で投与し、各投与量は2個の錠剤からなる、請求項1の方法。
- 医薬投与形は、約50重量%から約95重量%のラノラジンを含む、請求項1の方法。
- 医薬投与形は、約70重量%から約80重量%のラノラジンを含む、請求項1の方法。
- ヒト患者血漿中ラノラジンレベルのピーク対トラフは、24時間におよび4:1未満である、請求項1の方法。
- ヒト患者血漿中ラノラジンレベルのピーク対トラフは、24時間におよび3:1未満である、請求項1の方法。
- ヒト患者血漿中ラノラジンレベルのピーク対トラフは、24時間におよび2:1未満である、請求項1の方法。
- 投与量は、約500から1500mgのラノラジンを含む、請求項1の方法。
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JP2003525896A (ja) | 2003-09-02 |
AU2001240092B2 (en) | 2004-10-14 |
PL357273A1 (en) | 2004-07-26 |
NZ521292A (en) | 2008-07-31 |
HUP0204409A2 (en) | 2003-05-28 |
MXPA02008654A (es) | 2004-09-06 |
HK1058003A1 (en) | 2004-04-30 |
US6479496B1 (en) | 2002-11-12 |
EP1263439A2 (en) | 2002-12-11 |
NO20024270L (no) | 2002-11-06 |
AU4009201A (en) | 2001-09-17 |
AU2001240092B8 (en) | 2004-12-02 |
HUP0204409A3 (en) | 2005-04-28 |
AU2008212005A1 (en) | 2008-09-25 |
WO2001066093A2 (en) | 2001-09-13 |
IL151575A0 (en) | 2003-04-10 |
WO2001066093A3 (en) | 2002-03-14 |
JP4108980B2 (ja) | 2008-06-25 |
CN1323664C (zh) | 2007-07-04 |
CA2402222A1 (en) | 2001-09-13 |
CZ20022996A3 (cs) | 2003-09-17 |
RU2002126615A (ru) | 2004-03-20 |
CN1443069A (zh) | 2003-09-17 |
CA2402222C (en) | 2009-11-03 |
NO20024270D0 (no) | 2002-09-06 |
BR0109091A (pt) | 2005-02-15 |
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