JP5489719B2 - トピラマートの徐放性配合物 - Google Patents
トピラマートの徐放性配合物 Download PDFInfo
- Publication number
- JP5489719B2 JP5489719B2 JP2009537388A JP2009537388A JP5489719B2 JP 5489719 B2 JP5489719 B2 JP 5489719B2 JP 2009537388 A JP2009537388 A JP 2009537388A JP 2009537388 A JP2009537388 A JP 2009537388A JP 5489719 B2 JP5489719 B2 JP 5489719B2
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- Prior art keywords
- formulation
- topiramate
- release
- component
- immediate release
- 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.)
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Description
本出願は、2006年11月17日に出願された米国仮出願第60/859,502号(この内容全体は、参照により本明細書に援用される)の利益を主張する。
1.所望の放出プロファイルを決定する工程、
2.既定の放出プロファイルを生じるのに必要な持続放出構成成分及び即時放出構成成分の特定量を決定する工程、並びに
3.特定量の構成成分を配合物へ組み込む工程、
を含む。
1.トピラマート含有ビーズの少なくとも1つの集団を形成する工程、
2.各ビーズ集団をそれ自身のコーティング溶液でコーティングする工程、
3.或る期間コーティングを硬化させ、各ビーズ集団に特異的な放出制御コーティングを生じさせる工程、及び
4.ビーズを配合物へ組み込む工程、
を含む。
[定義]
本発明の目的で、「トピラマート」という用語は、トピラマート又はその任意の薬学的に許容される塩を含む。
Log(T80%放出)=a(コーティング%)+b。
T(80%放出)=a(コーティング%)+b。
1.所望の放出プロファイルを決定する工程、
2.既定の放出プロファイルを生じるのに必要な持続放出構成成分及び即時放出構成成分の特定量を決定する工程、並びに
3.特定量の構成成分を配合物へ組み込む工程、
を含む。
1.トピラマート含有ビーズの少なくとも1つの集団を形成する工程、
2.各ビーズ集団をそれ自身のコーティング溶液でコーティングする工程、
3.或る期間コーティングを硬化させて、各ビーズ集団に特異的な放出制御コーティングを生じさせる工程、及び
4.ビーズを配合物へ組み込む工程、
を含む。
実施例
糖スフェア上でのトピラマート薬物レイヤリング−「コア」
10%〜20%(w/w)のトピラマート(粒径90体積% NMT 30マイクロメートル、50体積% NMT 15マイクロメートル及び10体積% NMT 5マイクロメートル)及び0.5%〜4%(w/w)HPMC又は他の水性結合剤の水性懸濁液を薬物レイヤリングコーティング溶液として使用することができる。Wursterスプレーに適した流動床を構築し、糖スフェアのような不活性担体で充填する。コーティング懸濁液を床上へ噴霧して、不活性担体を所望のトピラマート負荷レベルにまで均一にコーティングする。コーティング溶液中のより高い結合剤濃度は、より小さなサイズの不活性担体及びより高いトピラマート負荷に使用され得る。入口空気流量及び製品温度は、バッチがコーティング材料を噴霧乾燥させないように、又はスフェアを過剰に湿潤させないように調節される。
放出制御コーティングによるコアのコーティング
エチルセルロース及びメチルセルロースのようなセルロースポリマーの分散液を使用して、本発明におけるコアをコーティングすることができる。エチルセルロース分散液(Surelease(登録商標))は、最終濃度を約10%〜約20%へ、また孔形成剤のような他の成分の使用を伴って又は伴わずに希釈することができる。Wursterスプレーに適した流動床を構築し、実施例1で調製されるコアで充填する。放出制御コーティング分散液を床上へ噴霧して、表1に例示されるような所望のコーティングレベルにまでコアを均一にコーティングする。
意図する量のトピラマートのおよそ半分を、一定に混合しながら水に添加した後、ヒドロキシプロピル−ベータ−シクロデキストリンを分散液へ散在させた。分散液の粘性が著しく減少してきたら、より多くの薬物物質を添加して、続いてより多くのヒドロキシプロピル−ベータ−シクロデキストリンを散在させた。薬物及びヒドロキシプロピル−ベータ−シクロデキストリンの添加工程を繰り返して、分散液を12時間〜18時間混合させた。別個に、ヒドロキシプロピルメチルセルロースを水中に溶解させた。上記トピラマート−ヒドロキシプロピル−ベータ−シクロデキストリン分散液及びヒドロキシプロピルメチルセルロース溶液を15分〜30分間ともに混合させて、混合物を80メッシュのふるいに通して選別した。得られた分散液を、流動床プロセッサを使用して糖スフェア上へ噴霧して、増強即時放出ビーズを得た(表2)。
トピラマートは、適切な量の向上剤(単数又は複数)(例えば、d−アルファ−トコフェリルポリエチレングリコール1000スクシネート(ビタミンE TPGS)及びラウリル硫酸ナトリウムの組合せ、ポリオキシル硬化ヒマシ油(種々の等級のCremophor RH)、ポリグリコール化グリセリド(種々の等級のGelucire)、ラウリル硫酸ナトリウムと組み合わせたポリグリコール化グリセリド(種々の等級のGelucire)、或いはそれらの組合せ)を含有する結合剤溶液(例えば、ヒドロキシプロピルメチルセルロース溶液)中に分散させる。得られた分散液を、流動床プロセッサを使用して不活性担体(例えば、糖スフェア)上へ噴霧して、所望の薬物負荷を達成する(表3)。
微粉化トピラマート又は非微粉化トピラマートを、加熱を伴って又は伴わずに、任意に溶解増強剤(例えば、マンノース、マルトース、マンニトール、ラクトース、マルトデキストリン及びデンプングリコール酸(glucolate)ナトリウム)を含有し、また任意に1つ又は複数のさらなる向上剤(例えば、PEG3350、ラウリル硫酸ナトリウム、ソディウムドキュセート、ポリオキシエチレンソルビタンモノオレエート及びPoloxamer)を含有する溶液中に、非溶解状態のままであるトピラマート粒子が約2ミクロン〜約30ミクロンの粒径を有するようなプロセスパラメータ下で分散させる。また、ホモジナイザーのような粒径低減機器を使用して、非溶解トピラマートの粒径を低減させることができる。次に、得られたトピラマート分散液を、コーティングプロセッサ(例えば、流動床プロセッサ)中で不活性担体(例えば、糖スフェア)上へ噴霧する。得られた配合物は表4に表わされる。
オーバーコートを伴うか又は伴わない放出制御コーティングでコーティングされたトピラマートビーズは、上述の溶媒援助硬化プロセスを使用して、或いは熱のみでの硬化プロセスを使用して、所望の硬化レベルへ、好ましくは完全硬化へ硬化させることができる。
a.持続放出ビーズ集団及び即時放出ビーズ集団を含有するトピラマート配合物に関する時間に対する血漿濃度の曲線は、健常な成体ボランティアにおける比較無作為化単回投与6ウェイ交差研究で作成された別個のビーズ集団に関する薬物動態データに基づいてWinNonlinバージョン5.0.1を使用してシミュレートされる。研究は、50mg経口用量の本明細書ではXR1、XR2及びXR3と称される3つの持続放出組成物、2つの即時放出組成物((Topamax(登録商標)、Ortho-McNeil Neurologics, Inc.)(25mg BID)及び即時放出ビーズ配合物)及び増強即時放出(IR)ビーズ組成物の投与を含んだ。XR1、XR2及びXR3に関する単回用量トピラマート血漿濃度プロファイルを図3に示す。IRに関する単回用量トピラマート血漿濃度プロファイルを図4に示す。データは、線形重ね合わせ原理(WinNonlin)を使用して、徐放性組成物に関しては24時間の投薬間隔、及びTopamaxに関しては12時間の投薬間隔を用いて定常状態(SS)へと投影させる。持続放出集団XR1、XR2及びXR3、並びに即時放出(IR)集団は、以下の3つの条件の組の少なくとも1つにより規定されるような方法で選択される:
1.定常状態に関して、
XR1に関しては、1.70CmaxIR≧CmaxXR1≧1.30CmaxIR
XR2に関しては、0.40CmaxIR≧CmaxXR2≧0.20CmaxIR
XR3に関しては、0.25CmaxIR≧CmaxXR3≧0.05CmaxIR
2.in vitroでの溶解に関して、
XR1に関しては、1.5h≦T80%≦4h
XR2に関しては、5h≦T80%≦8h
XR3に関しては、8h<T80%≦10h
3.in vivoでの単回初期用量に関して、
XR1に関しては、4h≦Tmax≦8.5h
XR2に関しては、Tmax≧16h
XR3に関しては、Tmax≧16h。
Claims (69)
- 有効成分としてトピラマートを含む哺乳類被験体への経口投与用のトピラマートの徐放性配合物であって、該有効成分は、既定の放出プロファイルに沿って該配合物から放出され、該配合物は、持続放出(XR)構成成分及び即時放出(IR)構成成分を含み、有効成分としてトピラマートを含む哺乳類被験体への経口投与用のトピラマートの徐放性配合物であって、
前記持続放出(XR)構成成分は、連続様式でin vivoでトピラマートを放出し、
前記有効成分の80%が、24時間以内に放出され、
放出制御コーティングでコーティングされ、且つ
それ自身の放出速度によって特徴付けられるビーズの少なくとも1つの集団中に提供される、
前記徐放性配合物。 - 前記即時放出(IR)構成成分は、錯化剤、増強剤又はその両方を含む増強即時放出(EIR)組成物である、請求項1に記載の配合物。
- 前記EIR組成物は、前記有効成分の80%が30分以内に溶解されるような放出プロファイルを示す、請求項2に記載の配合物。
- 前記EIR配合物は、a)10分以内での前記有効成分の少なくとも50%の溶解、b)10分以内での該有効成分の少なくとも70%の溶解、c)5分以内での該有効成分の少なくとも25%の溶解、d)5分以内での該有効成分の少なくとも40%の溶解、及びe)5分以内での該有効成分の少なくとも55%の溶解から成る群から選択される放出プロファイルを示す、請求項3に記載の配合物。
- 前記錯化剤が、ヒドロキシプロピル−ベータ−シクロデキストリン、ベータ−シクロデキストリン、ガンマ−シクロデキストリン、アルファ−シクロデキストリン、及びそれらの誘導体から成る群から選択されるシクロデキストリンである、請求項2に記載の配合物。
- 前記錯化剤がヒドロキシプロピル−ベータ−シクロデキストリンである、請求項5に記載の配合物。
- 前記増強剤が、溶解度増強剤、溶解増強剤、吸収増強剤、浸透増強剤、界面活性剤、安定剤、酵素阻害剤、p−糖タンパク質阻害剤、多剤耐性タンパク質阻害剤又はそれらの組合せである、請求項2に記載の配合物。
- 前記増強剤が、ビタミンE TPGS、グルタミン酸、グリシン、ソルビトール、マンノース、アミロース、マルトース、マンニトール、ラクトース、スクロース、グルコース、キシリトース、デキストリン、グリセロール−ポリエチレングリコールオキシステアレート、PEG−32グリセリルパルミトステアレート、ラウリル硫酸ナトリウム、ポリオキシエチレンソルビタンモノオレエート、ベンジルアルコール、ソルビタンモノラウレート、Poloxamer 407、PEG3350、PVP K25、オレイン酸、グリセリルモノオレエート、安息香酸ナトリウム、セチルアルコール、スクロースステアレート、クロスポビドン、デンプングリコール酸ナトリウム、クロスカルメロースナトリウム、カルボキシメチルセルロース、デンプン、アルファ化デンプン、HPMC、置換ヒドロキシプロピルセルロース、微結晶性セルロース、重炭酸ナトリウム、クエン酸カルシウム、ソディウムドキュセート、メントール、又はそれらの組合せである、請求項7に記載の配合物。
- 前記有効成分の少なくとも一部が、微粉化粒子の形態である、請求項1又は2に記載の配合物。
- 前記粒子は、2μm〜100μmの平均サイズを有する、請求項9に記載の配合物。
- 前記配合物は、錠剤、丸剤、カプセル剤、カプレット、トローチ剤、サシェ、カシェ、ポーチ又はスプリンクルの投薬形態である、請求項1に記載の配合物。
- 前記錠剤は、前記持続放出構成成分を含む少なくとも1つの層、及び前記即時放出構成成分を含む少なくとも1つの層を含む多層錠剤であり、前記即時放出構成成分は任意に、増強即時放出組成物である、請求項11に記載の配合物。
- 各構成成分の特定量は、投与の目的及び前記既定の放出プロファイルに従って決定され、前記配合物中のトピラマートの総量は、0.5mg〜3000mgである、請求項1に記載の配合物。
- 前記ビーズは、不活性担体、トピラマート、任意の向上剤並びにコーティング材料及び任意に孔形成剤及び他の賦形剤を含む放出制御コーティングを含む、請求項1に記載の配合物。
- 前記不活性担体は、セルローススフェア、二酸化ケイ素、デンプン及び糖スフェアから成る群から選択される、請求項14に記載の配合物。
- 前記向上剤は、溶解度向上剤、溶解向上剤、透過性向上剤、安定剤、錯化剤、酵素阻害剤、p−糖タンパク質阻害剤、多剤耐性タンパク質阻害剤及びそれらの組合せから成る群から選択される、請求項14に記載の配合物。
- 前記コーティング材料が、エチルセルロース、メチルセルロース、ヒドロキシプロピルセルロース、ヒドロキシプロピルメチルセルロース、酢酸セルロース、酢酸フタル酸セルロース、ポリビニルアルコール、ポリアクリレート、ポリメタクリレート又はそれらのコポリマーを含み、前記孔形成剤が、グルコース、フルクトース、マンニトール、マンノース、ガラクトース、ソルビトール、プルラン、デキストラン、水溶性親水性ポリマー、ヒドロキシアルキルセルロース、カルボキシアルキルセルロース、ヒドロキシプロピルメチルセルロース、セルロースエーテル、アクリル樹脂、ポリビニルピロリドン、架橋ポリビニルピロリドン、ポリエチレンオキシド、カーボワックス、カルボポール、ジオール、ポリオール、多価アルコール、ポリアルキレングリコール、ポリエチレングリコール、ポリプロピレングリコール若しくはそれらのブロックポリマー、ポリグリコール、ポリ(α−ω)アルキレンジオール;無機化合物;アルカリ金属塩;アルカリ土類金属塩又はそれらの組み合わせを含む、請求項14に記載の配合物。
- あらゆるビーズ集団の特定量は、前記既定の放出プロファイルに従って決定される、請求項1に記載の配合物。
- 前記既定の放出プロファイルは、初期即時放出後の持続的放出速度を含む、請求項1に記載の配合物。
- BIDの即時放出配合物として投与される同量のトピラマートと比較した場合の少なくとも1つの望ましくないCNS副作用のレベルの低減を特徴とする、請求項1に記載の配合物。
- 1日1回の経口投与に適した、請求項1に記載の配合物。
- 前記配合物は、錠剤、丸剤、カプセル剤、カプレット、トローチ剤、サシェ、カシェ、ポーチ又はスプリンクルの投薬形態である、請求項1に記載の配合物。
- 前記配合物は、BIDの即時放出配合物として投与される同量のトピラマートにより生じる最大血漿濃度の50%〜125%の範囲内であるトピラマートの最大定常状態血漿濃度(Cmax)を提供する、請求項1に記載の配合物。
- 前記Cmaxは、最小の治療上有効な濃度よりも高いが、BIDの即時放出配合物として投与される同量のトピラマートにより生じる最大血漿濃度よりも低い、請求項23に記載の配合物。
- 前記Cmaxは、BIDの即時放出配合物として投与される同量のトピラマートにより生じる最大血漿濃度の80%〜125%の範囲内である、請求項23に記載の配合物。
- 前記Cmaxは、BIDの即時放出配合物として投与される同量のトピラマートにより生じる最大血漿濃度の50%〜100%の範囲内である、請求項23に記載の配合物。
- 前記配合物は、BIDの即時放出配合物として投与される同量のトピラマートの定常状態の相対AUCの80%〜125%の範囲内の定常状態の相対AUCを提供する、請求項1に記載の配合物。
- 前記配合物は、BIDの即時放出配合物として投与される同量のトピラマートのAUCの25%〜90%の範囲内の変動度を提供する、請求項1に記載の配合物。
- 持続放出トピラマートビーズの少なくとも1つの集団は、前記放出制御コーティングの最上部にコーティングされる即時放出構成成分をさらに含む、請求項1に記載の配合物。
- 前記向上剤は、前記放出制御コーティングとは別個の層中に含有される、請求項14に記載の配合物。
- 少なくとも1つの増強剤をさらに含み、前記増強剤は、粉末の形態で又は任意に放出速度が制御されたビーズの集団中で前記配合物へ組み込まれ、該増強剤は、前記有効成分から分離される、請求項1に記載の配合物。
- 請求項1に記載の哺乳類被験体への経口投与用のトピラマートの徐放性配合物であって、トピラマートは、既定の放出プロファイルに沿って該配合物から放出され、該配合物は、XR1、XR2及びXR3と称される持続放出トピラマート含有ビーズの3つの集団、並びに即時放出(IR)ビーズ集団を含み、該配合物中の各集団の比例量は、下記表:
(表中、XR1、XR2及びXR3は、下記群:
1.定常状態に関して、
XR1に関しては、1.70CmaxIR≧CmaxXR1≧1.30CmaxIR
XR2に関しては、0.40CmaxIR≧CmaxXR2≧0.20CmaxIR
XR3に関しては、0.25CmaxIR≧CmaxXR3≧0.05CmaxIR
2.in vitroでの溶解に関して、
XR1に関しては、1.5h≦T80%≦4h
XR2に関しては、5h≦T80%≦8h
XR3に関しては、8h<T80%≦10h
3.in vivoでの単回初期用量に関して、
XR1に関しては、4h≦Tmax≦8.5h
XR2に関しては、Tmax≧16h
XR3に関しては、Tmax≧16h
から選択される条件の少なくとも1つが真でなくてはならないようなものであり、CmaxIRは、BIDの即時放出配合物として投与される同量のトピラマートから得られるものを指す)に従って選択される、哺乳類被験体への経口投与用のトピラマートの徐放性配合物。 - 前記IRビーズ集団は、a.定常状態に関して、2.40CmaxIR≧CmaxEIR≧1.20CmaxIR、b.in vitroでの溶解に関して、T80%≦30分又はc.in vivoでの単回初期用量に関して、Tmax≦2hの少なくとも1つの条件が真であるようなEIRで構成される、請求項32に記載の配合物。
- 請求項1に記載の持続放出(XR)構成成分及び即時放出(IR)構成成分を含むトピラマートの徐放性配合物を調製する方法であって、少なくとも前記XR構成成分は、それ自身の放出速度によって特徴付けられる少なくとも1つのビーズ集団中に含有され、該方法は、
トピラマート含有ビーズの少なくとも1つの集団を形成すること、
それ自身の放出制御コーティングで各ビーズ集団をコーティングすること、
或る期間硬化装置中で前記コーティングを硬化させて各ビーズ集団に特異的な前記放出制御コーティングを生じさせること、及び
既定の放出プロファイルに従って決定される量であらゆる集団の前記ビーズを前記配合物へ組み込むこと、
を含む、持続放出(XR)構成成分及び即時放出(IR)構成成分を含むトピラマートの徐放性配合物を調製する方法。 - 前記放出制御コーティングでコーティングされた前記トピラマート含有ビーズ中に含有されない少なくとも1つのさらなる成分を前記配合物へ組み込むことをさらに含む、請求項34に記載の方法。
- 放出の前記速度は、前記放出制御コーティングの組成、コーティングレベル、コーティング及び硬化のプロセスパラメータ、並びにそれらの組合せにより決定される、請求項34に記載の方法。
- 前記硬化工程は、溶媒の存在下で実施される、請求項34に記載の方法。
- 前記溶媒は、アルコール、ケトン、エーテル、エステル、アミド、アミン、炭化水素、有機酸及びフェノールから成る群から選択される有機溶媒、超臨界流体、アンモニア、水、水溶液並びにそれらの組合せからなる群から選択される有機溶媒である、請求項37に記載の方法。
- 前記硬化時間は、2週間から数時間へ低減される、請求項37に記載の方法。
- 前記放出の速度は、前記コーティング中の重量増加の関数である、請求項36に記載の方法。
- 前記さらなる成分は、前記即時放出構成成分、増強剤、錯化剤又はそれらの組合せであり、該さらなる成分は、粉末の形態で又は任意に制御された放出速度を特徴とするビーズ集団の形態で前記配合物へ組み込まれる、請求項35に記載の方法。
- 請求項1に記載の持続放出(XR)構成成分及び即時放出(IR)構成成分を含むトピラマートの徐放性配合物を調製する方法であって、トピラマートは、既定の放出プロファイルに沿った持続的速度で該配合物から放出され、該方法は、
前記所望の放出プロファイルを決定すること、
前記既定の放出プロファイルを生じるのに必要な前記持続放出構成成分及び前記即時放出構成成分の特定量を決定すること、並びに
前記特定量の前記構成成分を前記配合物へ組み込むこと、
を含む、持続放出(XR)構成成分及び即時放出(IR)構成成分を含むトピラマートの徐放性配合物を調製する方法。 - 前記即時放出構成成分が、錯化剤及び増強剤から選択される作用物質を少なくとも1つさらに含む増強即時放出(EIR)組成物であり、該増強剤が、溶解度増強剤、溶解増強剤、吸収増強剤、浸透増強剤、界面活性剤、安定剤、酵素阻害剤、p−糖タンパク質阻害剤、多剤耐性タンパク質阻害剤及びそれらの組合せから成る群から選択される、請求項42に記載の方法。
- 前記EIR組成物が、ヒドロキシプロピル−ベータ−シクロデキストリン、ベータ−シクロデキストリン、ガンマ−シクロデキストリン及びアルファ−シクロデキストリン、又はシクロデキストリン誘導体から成る群から選択されるシクロデキストリンを含む錯化剤で、トピラマートの高溶解性錯体を形成することによって調製される、請求項43に記載の方法。
- 前記錯化剤が、錯化剤とトピラマートとの重量比が3:2のヒドロキシプロピル−ベータ−シクロデキストリンである、請求項44に記載の方法。
- 前記EIR組成物が、ラウリル硫酸ナトリウム、D−アルファ−トコフェリルポリエチレングリコール1000スクシネート、ポリオキシル硬化ヒマシ油、ポリグリコール化グリセリド、ポリオキシエチレンソルビタンモノオレエート、Poloxamer 407、PVP−K25、スクロースステアレート、ソディウムドキュセート及びメントールから成る群から選択される溶解度向上剤の添加によって調製される高溶解形態のトピラマートを含む、請求項43に記載の方法。
- 前記EIR組成物は、前記有効成分の80%が30分以内に溶解されるような放出プロファイルを示す、請求項43に記載の方法。
- 前記即時放出構成成分は、a)10分以内での前記有効成分の少なくとも50%の溶解、b)10分以内での該有効成分の少なくとも70%の溶解、c)5分以内での該有効成分の少なくとも25%の溶解、d)5分以内での該有効成分の少なくとも40%の溶解、及びe)5分以内での該有効成分の少なくとも55%の溶解から成る群から選択される放出プロファイルを示す、請求項47に記載の方法。
- 前記放出プロファイルは、初期即時放出後の徐放を含む、請求項42に記載の方法。
- 請求項1に記載の持続放出構成成分及び増強即時放出構成成分を含むトピラマートの徐放性配合物を調製する方法であって、トピラマートは、既定の放出プロファイルに沿って該配合物から放出され、該方法は、
前記所望の放出プロファイルを決定すること、
前記既定の放出プロファイルを生じるのに必要な前記持続放出構成成分及び前記即時放出構成成分の特定量を決定すること、
トピラマートを錯化剤又は増強剤の少なくとも1つと組み合わせることにより前記増強即時放出構成成分を調製すること、
放出制御コーティングでコーティングされたトピラマート含有ビーズの少なくとも1つの集団を形成することにより前記持続放出構成成分を調製すること、並びに
前記特定量の前記構成成分を前記配合物へ組み込むこと、
を含む。 - 前記トピラマートの徐放性配合物は、錠剤、丸剤、カプセル剤、カプレット、トローチ剤、サシェ、カシェ、ポーチ又はスプリンクルの投薬形態で組み込まれる、請求項50に記載の方法。
- 前記徐放性配合物は、XR1、XR2及びXR3と称される持続放出トピラマート含有ビーズの3つの集団、並びに即時放出(IR)集団を含み、配合物中の各集団の比例量は
、下記表:
(表中、XR1、XR2及びXR3は、下記群:
1.定常状態に関して、
XR1に関しては、1.70CmaxIR≧CmaxXR1≧1.30CmaxIR
XR2に関しては、0.40CmaxIR≧CmaxXR2≧0.20CmaxIR
XR3に関しては、0.25CmaxIR≧CmaxXR3≧0.05CmaxIR
2.in vitroでの溶解に関して、
XR1に関しては、1.5h≦T80%≦4h
XR2に関しては、5h≦T80%≦8h
XR3に関しては、8h<T80%≦10h
3.in vivoでの単回初期用量に関して、
XR1に関しては、4h≦Tmax≦8.5h
XR2に関しては、Tmax≧16h
XR3に関しては、Tmax≧16h
から選択される条件の少なくとも1つが真でなくてはならないようなものであり、CmaxIRは、BIDの即時放出配合物として投与される同量のトピラマートから得られるものを指す)に従って選択される、請求項50に記載の方法。 - 前記即時放出ビーズ集団は、a.定常状態に関して、2.40CmaxIR≧CmaxEIR≧1.20CmaxIR、b.in vitroでの溶解に関して、T80%≦30分、c.in vivoでの単回初期用量に関して、Tmax≦2hの少なくとも1つの条件が真であるようなEIRで構成される、請求項52に記載の方法。
- 請求項1に記載のトピラマートの徐放性配合物を含む経口投薬形態であって、有効成分は、既定の放出プロファイルに沿って該配合物から放出され、該配合物は、持続放出(XR)構成成分及び即時放出(IR)構成成分を含む、トピラマートの徐放性配合物を含む経口投薬形態。
- 前記XR構成成分及び前記IR構成成分中のトピラマートの特定量は、前記既定の放出プロファイルにより決定され、前記配合物中のトピラマートの総量は、0.5mg〜3000mgである、請求項54に記載の経口投薬形態。
- 錠剤、丸剤、カプセル剤、カプレット、トローチ剤(trochee)、サシェ、カシェ、ポーチ及びスプリンクルから成る群から選択される、請求項55に記載の投薬形態。
- 少なくとも前記XR構成成分は、放出制御コーティングでコーティングされ、且つそれ自身の放出速度を特徴とする少なくとも1つのビーズ集団中に含有され、あらゆる集団のビーズの量は、既定の放出プロファイルに従って決定される、請求項54に記載の投薬形態。
- トピラマート含有ビーズの少なくとも1つの集団を形成する工程、
それ自身の放出制御コーティングで各ビーズ集団をコーティングする工程、
或る期間硬化装置中で前記コーティングを硬化させて、各ビーズ集団に特異的な放出制御コーティングを生じる工程、及び
既定の放出プロファイルに従って決定される量で前記ビーズを前記投薬形態へ組み込む工程、
を含むプロセスにより調製される、請求項57に記載の投薬形態。 - 前記硬化工程は、アルコール、ケトン、エーテル、エステル、アミド、アミン、炭化水素、有機酸及びフェノールから成る群から選択される有機溶媒、超臨界流体、アンモニア、水、水溶液並びにそれらの組合せから成る群から選択される溶媒の存在下で実施される、請求項58に記載の投薬形態。
- 増強即時放出組成物である即時放出構成成分を含む、請求項57に記載の経口投薬形態。
- 前記徐放性配合物は、XR1、XR2及びXR3と称される持続放出トピラマート含有ビーズの3つの集団、並びに即時放出(IR)集団を含み、配合物中の各集団の比例量は、下記表:
(表中、XR1、XR2及びXR3は、下記群:
1.定常状態に関して、
XR1に関しては、1.70CmaxIR≧CmaxXR1≧1.30CmaxIR
XR2に関しては、0.40CmaxIR≧CmaxXR2≧0.20CmaxIR
XR3に関しては、0.25CmaxIR≧CmklaxXR3≧0.05Cmax
IR
2.in vitroでの溶解に関して、
XR1に関しては、1.5h≦T80%≦4h
XR2に関しては、5h≦T80%≦8h
XR3に関しては、8h<T80%≦10h
3.in vivoでの単回初期用量に関して、
XR1に関しては、4h≦Tmax≦8.5h
XR2に関しては、Tmax≧16h
XR3に関しては、Tmax≧16h
から選択される条件の少なくとも1つが真でなくてはならないようなものであり、CmaxIRは、BIDの即時放出配合物として投与される同量のトピラマートから得られるものを指す)に従って選択される、請求項60に記載の経口投薬形態。 - 前記即時放出ビーズ集団は、a.定常状態に関して、2.40CmaxIR≧CmaxEIR≧1.20CmaxIR、b.in vitroでの溶解に関して、T80%≦30分、c.in vivoでの単回初期用量に関して、Tmax≦2hの少なくとも1つの条件が真であるようなEIRで構成される、請求項61に記載の投薬形態。
- カプセル剤である、請求項61に記載の投薬形態。
- 1日1回の投与に適した、請求項54に記載の経口投薬形態。
- 前記錠剤は、前記持続放出構成成分を含む少なくとも1つの層、及び前記即時放出構成成分を含む少なくとも1つの層を含む多層錠剤である、請求項56に記載の経口投薬形態。
- トピラマートと組み合わせてさらなる薬学的有効成分をさらに含む、請求項1に記載の配合物。
- トピラマートと組み合わせてさらなる薬学的有効成分をさらに含む、請求項54に記載の経口投薬形態。
- 前記有効成分の少なくとも一部が、微粉化粒子の形態である、請求項1に記載の配合物。
- 前記粒子は、2μm〜100μmの平均サイズを有する、請求項68に記載の配合物。
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