JP2004131393A - Readily eluting pharmaceutical preparation - Google Patents

Readily eluting pharmaceutical preparation Download PDF

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Publication number
JP2004131393A
JP2004131393A JP2002294662A JP2002294662A JP2004131393A JP 2004131393 A JP2004131393 A JP 2004131393A JP 2002294662 A JP2002294662 A JP 2002294662A JP 2002294662 A JP2002294662 A JP 2002294662A JP 2004131393 A JP2004131393 A JP 2004131393A
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JP
Japan
Prior art keywords
sodium
compound
readily
pharmaceutical preparation
eluting
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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.)
Pending
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JP2002294662A
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Japanese (ja)
Inventor
Jinichiro Takano
高野 仁一郎
Hiroyuki Kawashima
川島 弘行
Yasuo Shinoda
篠田 泰雄
Toshio Inagi
稲木 敏男
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Kowa Co Ltd
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Kowa Co Ltd
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Filing date
Publication date
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Publication of JP2004131393A publication Critical patent/JP2004131393A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a readily eluting pharmaceutical preparation having excellent eluting properties into water, stably maintaining eluted 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one and without deposition thereof and improving its absorptivity into blood. <P>SOLUTION: This readily eluting pharmaceutical preparation comprises the 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one, hydroxypropyl methyl cellulose and an anionic surfactant selected from the group consisting of sodium lauryl sulfate, sodium dioctyl sulfosuccinate, sodium N-cocoyl-N-methylaminoethylsulfonate and a sodium alkylnaphthalenesulfonate. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、溶出性及び溶出安定性の優れた2−ベンジル−5−(4−クロロフェニル)−6−[4−(メチルチオ)フェニル]−2H−ピリダジン−3−オン(以下、化合物1という)含有製剤に関する。
【0002】
【従来の技術】
化合物1は、優れたインターロイキン−1β産生抑制作用を有し、免疫系疾患、炎症性疾患、虚血性疾患の予防治療薬、特に関節リウマチの治療薬として有用であることが知られている(例えば、特許文献1参照)。
本発明者は、当該化合物1を経口投与用医薬製剤として利用すべく検討してきた。しかし、この化合物1は、極めて水に溶け難く、製剤からの溶出性が悪く、さらに溶出してもすぐに結晶として析出してしまい、充分な薬効が得られないことが判明した。
難水溶性薬物含有製剤から当該薬物の水への溶出性を改善する手段としては、一般に当該薬物を微細化する方法、誘導体に変換する方法が知られている。しかし、化合物1の場合、微細化しても溶出性が改善されず、誘導体に変換すると薬効が変化し好ましくないことが判明した。
【0003】
【特許文献1】
特開2000−198776号公報
【0004】
【発明が解決しようとする課題】
従って、本発明の目的は、製剤からの溶出性及び溶出安定性の優れた化合物1含有製剤を提供することにある。
【0005】
【課題を解決するための手段】
本発明者は、化合物1と種々の成分とを組み合せて製剤を調製し、その製剤からの化合物1の溶出性を検討したところ、化合物1にヒドロキシプロピルメチルセルロースと特定の陰イオン性界面活性剤を組み合せて固体分散体とすれば、化合物1の溶出性が顕著に向上し、さらに溶出後に結晶析出がなく溶出安定性も優れ、経口投与用製剤として有用な製剤が得られることを見出し、本発明を完成した。
【0006】
すなわち、本発明は、化合物1、ヒドロキシプロピルメチルセルロース、並びにラウリル硫酸ナトリウム、スルホコハク酸ジオクチルナトリウム、N−ココイル−N−メチルアミノエチルスルホン酸ナトリウム及びアルキルナフタレンスルホン酸ナトリウムの群から選ばれる陰イオン性界面活性剤を含有することを特徴とする易溶出性製剤を提供するものである。
また、本発明は、化合物1、ヒドロキシプロピルメチルセルロース、並びにラウリル硫酸ナトリウム、スルホコハク酸ジオクチルナトリウム、N−ココイル−N−メチルアミノエチルスルホン酸ナトリウム及びアルキルナフタレンスルホン酸ナトリウムの群から選ばれる陰イオン性界面活性剤を含有することを特徴とする固体分散体を提供するものである。
【0007】
【発明の実施の形態】
本発明において使用する化合物1、すなわち2−ベンジル−5−(4−クロロフェニル)−6−[4−(メチルチオ)フェニル]−2H−ピリダジン−3−オンは、例えば、特開2000−198776に記載の方法で製造される。
本発明の易溶出性製剤中に化合物1は、製剤全量に対して0.1〜25重量%、さらに0.1〜20重量%、特に0.5〜15重量%含有するのが薬効の点で好ましい。
【0008】
本発明において使用するヒドロキシプロピルメチルセルロースとしては、メトキシ基含有率が19〜30重量%、好ましくは28〜30重量%であり、ヒドロキシプロポキシ基含有率が4〜12重量%、好ましくは7〜12重量%であり、かつ粘度が2.5〜7mm/s(20℃)のものが最も好ましい。ここで、粘度は、試料2gを水98mLに溶解した水溶液を、日本薬局方の粘度測定法第一法(毛細管粘度計法)により、20℃で測定した値をいう。例えば、ヒドロキシプロピルメチルセルロース2208、ヒドロキシプロピルメチルセルロース2906、ヒドロキシプロピルメチルセルロース2910、具体的には、メトローズ90SH、メトローズ65SH、メトローズ60SH、TC−5(信越化学工業製)、メトセルK、メトセルF、メトセルE(ダウ・ケミカル製)、マーポローズ(松本油脂製薬製)が市販されている。
【0009】
ヒドロキシプロピルメチルセルロースは、化合物1、1重量部に対して、2〜15重量部、特に3〜10重量部含有するのが好ましい。
【0010】
本発明で使用するラウリル硫酸ナトリウムとしては、例えば、エマール(花王製)、ニッコールSLS(日光ケミカルズ製)、パーソフト(日本油脂製)、モノゲンY−500(第一工業製薬製)などが市販されている。スルホコハク酸ジオクチルナトリウムとしては、例えば、ニッコールOTP−100(日光ケミカルズ製)などが市販されている。N−ココイル−N−メチルアミノエチルスルホン酸ナトリウムとしては、Geropon TC−42(ローヌ・プランジャパン製)などが市販されている。またアルキルナフタレンスルホン酸ナトリウムのアルキル基炭素数は10〜18が好ましい。
【0011】
陰イオン性界面活性剤としては、ラウリル硫酸ナトリウム、スルホコハク酸ジオクチルナトリウムが好ましく、特にラウリル硫酸ナトリウムが好ましい。
【0012】
陰イオン性界面活性剤は、1種又は2種以上を併用してもよい。
陰イオン性界面活性剤は、化合物1、1重量部に対して0.01〜30重量部、更に0.05〜20重量部、特に0.1〜20重量部含有するのが好ましい。2種以上を併用する場合は、合計量がこの範囲にあればよい。
【0013】
本発明の易溶出性製剤は、化合物1、ヒドロキシプロピルメチルセルロース及び陰イオン性界面活性剤を予め製剤化し、固体分散体とし、次いで適宜使用される成分と混合して易溶出性製剤とするのが、溶出性の点で好ましい。
【0014】
これら成分の固体分散体を製造するには、例えば、これら成分を溶剤中に溶解した後、常法により溶剤を除去する方法が好ましい。
溶剤としては、これら成分の溶解能力の点でメチルアルコール、エチルアルコール、イソプロピルアルコール、アセトン、ジクロロメタンなどの有機溶媒、水又はそれらの混合物又はそれと水の混合物などが挙げられる。
溶剤の除去は、該溶剤を除去できれば方法に制限はなく、例えば、減圧留去、スプレードライヤー又は流動層造粒機若しくは転動造粒機などの機械で核粒子に噴霧するなどの方法が挙げられる。
固体分散体の製造に際し、易溶出性製剤の製造に使用される成分を溶解しておいてもよい。
【0015】
固体分散体は、溶出性の点で、平均粒径が1〜1000μm、さらに2〜800μm、特に10〜600μmであるのが好ましい。この平均粒径は、レーザー光散乱回折法で測定した値をいう。
【0016】
本発明の易溶出性製剤は、このようにして製造された固体分散体を、そのまま易溶出性製剤として用いてもよいが、さらに適宜使用される成分を添加して製剤化してもよい。
適宜使用される成分としては、乳糖、結晶セルロース、白糖、マンニトール、軽質無水ケイ酸、リン酸水素カルシウムなどの賦形剤;メチルセルロース、ヒドロキシプロピルセルロース、ゼラチン、ポリビニルピロリドン、プルランなどの結合剤;クロスカルメロースカルシウム、低置換度ヒドロキシプロピルセルロースなどの崩壊剤;ステアリン酸マグネシウム、タルクなどの滑沢剤;タール色素、三二酸化鉄などの着色剤;ステビア、アスパルテーム、香料などの矯味剤などが挙げられる。
【0017】
本発明の易溶出性製剤は、固形の形態であれば限定されるものではない。例えば、服用しやすい形態としては、錠剤、カプセル剤、顆粒剤、細粒剤などが挙げられる。
【0018】
【実施例】
本発明を、実施例及び比較例により、さらに具体的に説明するが、本発明はこれらの実施例に限定されるものではない。
【0019】
実施例1〜6
化合物1、15g、ヒドロキシプロピルメチルセルロース(メトキシ基29重量%、ヒドロキシプロポキシ基10重量%)(信越化学工業製:TC−5R)45g、ラウリル硫酸ナトリウム(日光ケミカルズ製:ニッコールSLS)又はスルホコハク酸ジオクチルナトリウム(日光ケミカルズ製:ニッコールOTP−100)X(表1記載量)をエタノール/アセトン/水混合液(混合体積比率:9/10/1)2400mLに添加し、攪拌しながら50℃に加温して溶解した。この溶液をスプレードライヤー(ヤマト科学製GS−31)にて噴霧乾燥し、固体分散体粉末を得た。
【0020】
比較例1
化合物1、15g、ヒドロキシプロピルメチルセルロース(実施例1と同じもの)45gをエタノール/アセトン/水混合液(混合体積比率:9/10/1)2400mLに添加し、攪拌しながら50℃に加温して溶解した。この溶液をスプレードライヤーにて噴霧乾燥し、固体分散体粉末を得た。
【0021】
比較例2
化合物1、15g、ヒドロキシプロピルメチルセルロース(実施例1と同じもの)45g、モノステアリン酸グリセリン(日光ケミカルズ製:ニッコールMGS−B)1.5g、及びステアリン酸ポリオキシル40(日光ケミカルズ製:ニッコールMYS−40)3gをエタノール/アセトン/水混合液(混合体積比率:9/10/1)2400mLに添加し、攪拌しながら50℃に加温して溶解した。この溶液をスプレードライヤーにて噴霧乾燥し、固体分散体粉末を得た。
【0022】
比較例3
化合物1、15g、ヒドロキシプロピルメチルセルロース(実施例1と同じもの)45g、ポリソルベート80(日光ケミカルズ製:ニッコールTO−10M)7.5gをエタノール/アセトン/水混合液(混合体積比率:9/10/1)2400mLに添加し、攪拌しながら50℃に加温して溶解した。この溶液をスプレードライヤーにて噴霧乾燥し、固体分散体粉末を得た。
【0023】
試験例1 溶出試験
製造した実施例1〜6、比較例1〜3の固体分散体の溶出性及び溶出安定性を次法に従って行った。
溶出試験(日局一般試験法 溶出試験法第2法(パドル法))
化合物1、10mg含有する固体分散体を水900mL中に投入し、温度37±1℃、パドル回転数50r/minの条件で溶出量を測定した。
化合物1の溶出量は、逆相系カラム(ジーエルサイエンス製:Inertsil ODS−2)を用いた高性能液体クロマトグラフ法により測定した。
溶出安定性は、120分撹拌した試験液を顕微鏡で肉眼観察し、結晶の析出の有無を判定した。
【0024】
【表1】

Figure 2004131393
【0025】
実施例1〜6の固体分散体は、化合物1の溶出性に優れ、特に経時的な結晶析出が抑制されたのに対し、比較例1では化合物1が殆んど溶出せず、また比較例2、3は初期溶出性は示すが、経時的に化合物1が結晶として析出した。
【0026】
試験例2 吸収性試験
実施例5及び比較例1の固体分散体を、HRA系ビーグル犬(体重約10kg)に、化合物1として10mg/kg経口投与し、投与後24時間迄、経時的に採血し、遠心分離した後、試験例1と同様にして高性能液体クロマトグラフ法により血中の本化合物濃度を測定した。最高血中濃度は、実施例1は0.315μg/mL、比較例1は0.008μg/mLであった。本発明の固体分散体は優れた血中への吸収性を示した。
【0027】
実施例7
実施例1で製造した固体分散体粉末42g、乳糖190g、カルメロースカルシウム26g及び軽質無水ケイ酸2gを混合し、打錠機で打錠し、0.26g/個の直径8.5mmの易溶出性製剤を得た。
【0028】
【発明の効果】
本発明の易溶出性製剤は、水への溶出性が優れ、溶出した2−ベンジル−5−(4−クロロフェニル)−6−[4−(メチルチオ)フェニル]−2H−ピリダジン−3−オンが析出せず、安定に維持され血中への吸収性も改善される。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides 2-benzyl-5- (4-chlorophenyl) -6- [4- (methylthio) phenyl] -2H-pyridazin-3-one (hereinafter, referred to as compound 1) having excellent elution properties and elution stability. Related formulation.
[0002]
[Prior art]
Compound 1 has an excellent inhibitory effect on interleukin-1β production, and is known to be useful as a prophylactic / therapeutic agent for immune system diseases, inflammatory diseases, and ischemic diseases, particularly as a therapeutic agent for rheumatoid arthritis ( For example, see Patent Document 1).
The present inventors have studied to use the compound 1 as a pharmaceutical preparation for oral administration. However, it was found that this compound 1 was extremely poorly soluble in water, poorly dissolvable from the preparation, and immediately precipitated as crystals even after dissolution, so that sufficient drug efficacy was not obtained.
As a means for improving the dissolution property of the drug from the poorly water-soluble drug-containing preparation into water, there are generally known a method of pulverizing the drug and a method of converting the drug into a derivative. However, in the case of Compound 1, it was found that the dissolution property was not improved even when the composition was miniaturized, and that when converted to a derivative, the drug effect was changed, which was not preferable.
[0003]
[Patent Document 1]
JP 2000-198776 A
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a compound 1-containing preparation excellent in dissolution property and dissolution stability from the preparation.
[0005]
[Means for Solving the Problems]
The present inventor prepared a formulation by combining compound 1 and various components, and examined the dissolution property of compound 1 from the formulation, and found that hydroxypropylmethylcellulose and a specific anionic surfactant were added to compound 1. The present invention has been found that, when combined with a solid dispersion, the dissolution of Compound 1 is remarkably improved, and furthermore, there is no crystal precipitation after dissolution and the dissolution stability is excellent, and a preparation useful as a preparation for oral administration can be obtained. Was completed.
[0006]
That is, the present invention relates to a compound 1, hydroxypropylmethylcellulose, and an anionic interface selected from the group of sodium lauryl sulfate, sodium dioctyl sulfosuccinate, sodium N-cocoyl-N-methylaminoethylsulfonate and sodium alkylnaphthalenesulfonate. It is intended to provide an easily dissolvable preparation characterized by containing an active agent.
The present invention also relates to a compound 1, hydroxypropylmethylcellulose, and an anionic interface selected from the group consisting of sodium lauryl sulfate, sodium dioctyl sulfosuccinate, sodium N-cocoyl-N-methylaminoethylsulfonate and sodium alkylnaphthalenesulfonate. It is intended to provide a solid dispersion characterized by containing an activator.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Compound 1, that is, 2-benzyl-5- (4-chlorophenyl) -6- [4- (methylthio) phenyl] -2H-pyridazin-3-one used in the present invention is described in, for example, JP-A-2000-198776. It is manufactured by the method described above.
The compound 1 is contained in the easily dissolvable preparation of the present invention in an amount of 0.1 to 25% by weight, more preferably 0.1 to 20% by weight, particularly 0.5 to 15% by weight based on the total amount of the preparation. Is preferred.
[0008]
The hydroxypropylmethylcellulose used in the present invention has a methoxy group content of 19 to 30% by weight, preferably 28 to 30% by weight, and a hydroxypropoxy group content of 4 to 12% by weight, preferably 7 to 12% by weight. % And a viscosity of 2.5 to 7 mm 2 / s (20 ° C.) is most preferable. Here, the viscosity refers to a value obtained by measuring an aqueous solution obtained by dissolving 2 g of a sample in 98 mL of water at 20 ° C. by the first method of viscosity measurement (capillary viscometer method) of the Japanese Pharmacopoeia. For example, hydroxypropylmethylcellulose 2208, hydroxypropylmethylcellulose 2906, hydroxypropylmethylcellulose 2910, specifically Metrolose 90SH, Metrolse 65SH, Metrolose 60SH, TC-5 (manufactured by Shin-Etsu Chemical Co., Ltd.), Methocel K, Methocel F, Methocel E ( Dow Chemical) and Marpo Rose (Matsumoto Yushi Seiyaku) are commercially available.
[0009]
Hydroxypropyl methylcellulose is preferably contained in an amount of 2 to 15 parts by weight, particularly 3 to 10 parts by weight, based on 1 part by weight of compound 1.
[0010]
As the sodium lauryl sulfate used in the present invention, for example, Emal (manufactured by Kao), Nikkor SLS (manufactured by Nikko Chemicals), Parsoft (manufactured by NOF Corporation), Monogen Y-500 (manufactured by Daiichi Kogyo Seiyaku) and the like are commercially available. ing. As dioctyl sodium sulfosuccinate, for example, Nikkor OTP-100 (manufactured by Nikko Chemicals) is commercially available. Geropon TC-42 (manufactured by Rhone Plan Japan) and the like are commercially available as sodium N-cocoyl-N-methylaminoethylsulfonate. Further, the alkyl group carbon number of the sodium alkylnaphthalene sulfonate is preferably from 10 to 18.
[0011]
As the anionic surfactant, sodium lauryl sulfate and dioctyl sodium sulfosuccinate are preferable, and sodium lauryl sulfate is particularly preferable.
[0012]
One or two or more anionic surfactants may be used in combination.
The anionic surfactant is preferably contained in an amount of 0.01 to 30 parts by weight, more preferably 0.05 to 20 parts by weight, particularly preferably 0.1 to 20 parts by weight, based on 1 part by weight of Compound 1. When two or more kinds are used in combination, the total amount may be within this range.
[0013]
In the easily dissolvable preparation of the present invention, the compound 1, hydroxypropylmethylcellulose and an anionic surfactant are pre-formulated, and a solid dispersion is prepared. It is preferable in terms of elution.
[0014]
In order to produce a solid dispersion of these components, for example, a method of dissolving these components in a solvent and then removing the solvent by a conventional method is preferable.
Examples of the solvent include organic solvents such as methyl alcohol, ethyl alcohol, isopropyl alcohol, acetone, and dichloromethane, water, a mixture thereof, and a mixture thereof with water, in terms of the dissolving ability of these components.
The method of removing the solvent is not particularly limited as long as the solvent can be removed, and examples thereof include a method of vacuum distillation, a method of spraying the core particles with a machine such as a spray dryer or a fluidized bed granulator or a tumbling granulator, and the like. Can be
In producing the solid dispersion, the components used for producing the easily dissolvable preparation may be dissolved.
[0015]
The solid dispersion preferably has an average particle size of 1 to 1000 μm, more preferably 2 to 800 μm, particularly preferably 10 to 600 μm, from the viewpoint of dissolution. The average particle size is a value measured by a laser light scattering diffraction method.
[0016]
Although the solid dispersion thus produced may be used as the easily dissolvable preparation as it is for the easily dissolvable preparation of the present invention, the solid dispersion may be further formulated by adding appropriately used components.
Suitable ingredients include excipients such as lactose, crystalline cellulose, sucrose, mannitol, light anhydrous silicic acid, calcium hydrogen phosphate; binders such as methylcellulose, hydroxypropylcellulose, gelatin, polyvinylpyrrolidone, pullulan; Disintegrators such as carmellose calcium and low-substituted hydroxypropylcellulose; lubricants such as magnesium stearate and talc; coloring agents such as tar pigments and iron sesquioxide; and flavoring agents such as stevia, aspartame, and flavors. .
[0017]
The easily dissolvable preparation of the present invention is not limited as long as it is in a solid form. For example, forms that are easy to take include tablets, capsules, granules, and fine granules.
[0018]
【Example】
The present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.
[0019]
Examples 1 to 6
Compound 1, 15 g, hydroxypropyl methylcellulose (methoxy group 29% by weight, hydroxypropoxy group 10% by weight) (manufactured by Shin-Etsu Chemical: TC-5R) 45 g, sodium lauryl sulfate (Nikko Chemicals: Nikkor SLS) or dioctyl sodium sulfosuccinate (Nikkol OTP-100 manufactured by Nikko Chemicals) X g (the amount described in Table 1) was added to 2400 mL of an ethanol / acetone / water mixture (mixing volume ratio: 9/10/1), and the mixture was heated to 50 ° C. while stirring. And dissolved. This solution was spray-dried with a spray dryer (GS-31 manufactured by Yamato Scientific Co., Ltd.) to obtain a solid dispersion powder.
[0020]
Comparative Example 1
Compound 1, 15 g, and hydroxypropylmethylcellulose (the same as in Example 1) 45 g were added to 2400 mL of an ethanol / acetone / water mixture (mixing volume ratio: 9/10/1), and the mixture was heated to 50 ° C. while stirring. Dissolved. This solution was spray-dried with a spray drier to obtain a solid dispersion powder.
[0021]
Comparative Example 2
Compound 1, 15 g, hydroxypropylmethylcellulose (same as in Example 1) 45 g, glycerin monostearate (Nikko Chemicals: Nikkor MGS-B) 1.5 g, and polyoxyl stearate 40 (Nikko Chemicals: Nikkor MYS-40) 3) was added to 2400 mL of a mixed solution of ethanol / acetone / water (mixing volume ratio: 9/10/1), and the mixture was heated to 50 ° C. with stirring to dissolve. This solution was spray-dried with a spray drier to obtain a solid dispersion powder.
[0022]
Comparative Example 3
Compound 1, 15 g, hydroxypropyl methylcellulose (same as in Example 1) 45 g, and Polysorbate 80 (Nikko Chemicals: Nikkor TO-10M) 7.5 g were mixed with ethanol / acetone / water (mixing volume ratio: 9/10 / 1) It was added to 2400 mL and heated to 50 ° C. with stirring to dissolve. This solution was spray-dried with a spray drier to obtain a solid dispersion powder.
[0023]
Test Example 1 Dissolution Test The dissolution properties and dissolution stability of the manufactured solid dispersions of Examples 1 to 6 and Comparative Examples 1 to 3 were determined according to the following methods.
Dissolution test (JP method, dissolution test method 2 (paddle method))
The solid dispersion containing Compound 1 and 10 mg was put into 900 mL of water, and the elution amount was measured at a temperature of 37 ± 1 ° C. and a paddle rotation speed of 50 r / min.
The amount of Compound 1 eluted was measured by a high-performance liquid chromatography using a reversed-phase column (manufactured by GL Sciences: Inertsil ODS-2).
The dissolution stability was determined by visually observing the test solution stirred for 120 minutes with a microscope to determine whether crystals had precipitated.
[0024]
[Table 1]
Figure 2004131393
[0025]
The solid dispersions of Examples 1 to 6 were excellent in the dissolution property of Compound 1 and, in particular, the precipitation of crystals with time was suppressed, whereas Comparative Example 1 hardly eluted Compound 1, and Comparative Example 1 Compounds 2 and 3 showed initial dissolution, but Compound 1 was precipitated as a crystal over time.
[0026]
Test Example 2 Absorbency Test The solid dispersions of Example 5 and Comparative Example 1 were orally administered as a compound 1 to HRA-based beagle dogs (body weight: about 10 kg) at 10 mg / kg, and blood was collected over time up to 24 hours after administration. After centrifugation, the concentration of the present compound in blood was measured by high performance liquid chromatography in the same manner as in Test Example 1. The highest blood concentration was 0.315 μg / mL in Example 1 and 0.008 μg / mL in Comparative Example 1. The solid dispersion of the present invention showed excellent blood absorbability.
[0027]
Example 7
42 g of the solid dispersion powder produced in Example 1, 190 g of lactose, 26 g of carmellose calcium, and 2 g of light anhydrous silicic acid were mixed, and the mixture was tableted with a tableting machine to easily dissolve 0.26 g / piece with a diameter of 8.5 mm. The formulation was obtained.
[0028]
【The invention's effect】
The easily dissolving preparation of the present invention has excellent dissolution property in water, and eluted 2-benzyl-5- (4-chlorophenyl) -6- [4- (methylthio) phenyl] -2H-pyridazin-3-one. It does not precipitate, is maintained stably, and has improved absorption into the blood.

Claims (2)

2−ベンジル−5−(4−クロロフェニル)−6−[4−(メチルチオ)フェニル]−2H−ピリダジン−3−オン、ヒドロキシプロピルメチルセルロース、並びにラウリル硫酸ナトリウム、スルホコハク酸ジオクチルナトリウム、N−ココイル−N−メチルアミノエチルスルホン酸ナトリウム及びアルキルナフタレンスルホン酸ナトリウムの群から選ばれる陰イオン性界面活性剤を含有することを特徴とする易溶出性製剤。2-benzyl-5- (4-chlorophenyl) -6- [4- (methylthio) phenyl] -2H-pyridazin-3-one, hydroxypropyl methylcellulose, sodium lauryl sulfate, dioctyl sodium sulfosuccinate, N-cocoyl-N -An easily dissolving preparation containing an anionic surfactant selected from the group consisting of sodium methylaminoethylsulfonate and sodium alkylnaphthalenesulfonate. 2−ベンジル−5−(4−クロロフェニル)−6−[4−(メチルチオ)フェニル]−2H−ピリダジン−3−オン、ヒドロキシプロピルメチルセルロース、並びにラウリル硫酸ナトリウム、スルホコハク酸ジオクチルナトリウム、N−ココイル−N−メチルアミノエチルスルホン酸ナトリウム及びアルキルナフタレンスルホン酸ナトリウムの群から選ばれる陰イオン性界面活性剤を含有することを特徴とする固体分散体。2-benzyl-5- (4-chlorophenyl) -6- [4- (methylthio) phenyl] -2H-pyridazin-3-one, hydroxypropyl methylcellulose, sodium lauryl sulfate, dioctyl sodium sulfosuccinate, N-cocoyl-N -A solid dispersion containing an anionic surfactant selected from the group consisting of sodium methylaminoethylsulfonate and sodium alkylnaphthalenesulfonate.
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