JP3850473B2 - Persistent tablets - Google Patents
Persistent tablets Download PDFInfo
- Publication number
- JP3850473B2 JP3850473B2 JP30152795A JP30152795A JP3850473B2 JP 3850473 B2 JP3850473 B2 JP 3850473B2 JP 30152795 A JP30152795 A JP 30152795A JP 30152795 A JP30152795 A JP 30152795A JP 3850473 B2 JP3850473 B2 JP 3850473B2
- Authority
- JP
- Japan
- Prior art keywords
- sustained
- acetaminophen
- sustained release
- tablets
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Medicinal Preparation (AREA)
Description
【0001】
【発明の属する技術分野】
本発明はアセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含有してなる持続性のかぜ薬の錠剤に関するものである。
【0002】
【従来の技術】
アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンは一般用医薬品製造(輸入)承認基準(1995)に於いて、かぜ薬への配合基準が示されており、カフェイン剤、ビタミン剤、抗ヒスタミン剤、生薬等と多種多様に組み合わせて、総合感冒薬の中に広く用いられている成分である。かぜ薬の用法・用量は通常1日3回であるが、薬剤の飲み忘れを防止し、確実な服用を期すためには、1日2回に服用回数を減らした製剤の開発が望ましい。1日2回服用のかぜ薬は既に市販されているが、これらの製剤の中には、不特定多数の人が服用する一般用医薬品としては服用に際して注意が必要なかぜ薬承認基準外の成分が配合されていたり、さらには「徐放性製剤(経口投与製剤)の設計及び評価に関するガイドライン」(昭和63年3月11日付け薬審1第5号)に照らして好ましくない成分が徐放化されていたりしている。
【0003】
徐放化により服用回数を減じたかぜ薬の形状としては錠剤、カプセル剤、顆粒剤が考えられるが、喉及び食道粘膜への付着や服用の容易さを考えると錠剤が適している。また服用時の噛み砕きによる徐放化皮膜の損傷、或いは消化管移動の影響を減じるという面からは顆粒剤、又は顆粒を充填したカプセル剤が錠剤よりも優れている。これらのことを考え合わせると、製剤の形態としては、錠剤の形状で、胃内で顆粒を放出するような製剤が理想的である。
一般に1日3回服用を1日2回服用とするためには、有効成分を含む芯顆粒や錠剤に放出制御被膜を施して徐放化して血漿中薬物濃度を維持し、服用回数の減少を図っている。
【0004】
しかしながら、複数成分を徐放化して放出制御する場合は、その製剤設計も難しさが倍加する。特にアセトアミノフェン、リン酸ジヒドロコデイン、dl−塩酸メチルエフェドリンのように溶解度が異なり、初回通過効果を受けやすい成分を含む場合は、これらの成分を徐放化して目的とする血中濃度が得られるように製剤設計することは極めて難しい。このため、これら3成分を、確実な効能効果が期待できる配合量であるかぜ薬の承認基準の最大量まで配合して徐放化により1日2回服用とした錠剤はこれまで知られていない。
【0005】
従って、「かぜ薬承認基準」に収載されており、かぜ薬として長く使用されてきた安全性の高いアセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンをかぜ薬承認基準の最大量を配合し、製剤学的工夫により服用を1日2回に減じ、しかも服用の容易な錠剤の形態を有しながら、服用後は速やかな崩壊により胃内で放出制御顆粒を放出する機能を備えたかぜ薬を開発し、市場に供することは有意義なことである。
【0006】
【発明が解決しようとする課題】
従って、本発明は安全性の確認されているかぜ薬承認基準成分であるアセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含有し、1日2回の服用で1日3回服用と同等の効果が得られる服用の容易な錠剤の形態を有する持続性かぜ薬を提供することを目的とする。
【0007】
【課題を解決するための手段】
かかる実情において、本発明者らは鋭意検討を行った結果、アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含有する顆粒に、腸溶性被膜を施して徐放部とし、これにアセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含む非徐放部を易溶性の顆粒又は粉末として一定の割合で添加し、成型に必要な添加剤を加えて製錠することにより、血中濃度のピーク値が1日3回服用の普通製剤の血中濃度以下に抑え、しかも血中濃度の持続化された1日2回服用の錠剤を得ることができることを見い出し、本発明を完成した。
【0008】
すなわち、本発明は、(A)アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含有し、メタアクリル酸コポリマー類及びヒドロキシプロピルメチルセルロースフタレートから選ばれる1種以上を含む腸溶性被膜が施されてなる徐放性顆粒部;並びに(B)アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含有する非徐放性部を有し、徐放性顆粒部(A)と非徐放性部(B)の配合比率が4:6〜6:4である持続性かぜ薬の錠剤を提供するものである。
【0009】
【発明の実施の形態】
本発明において、徐放性顆粒部(A)としては、アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含有し、腸溶性被膜が施された顆粒であることが必要である。
【0010】
上記腸溶性被膜成分としては、特に制限されず、pH5〜7で溶解する成分、例えば、メタアクリル酸メタアクリル酸メチルコポリマー〔メタアクリル酸コポリマーL(商品名;オイドラギットL)、メタアクリル酸コポリマーS(商品名;オイドラギットS)、メタアクリル酸アクリル酸エチルコポリマー〔メタアクリル酸コポリマーLD(商品名;オイドラギットL30D−55)〕等のメタアクリル酸コポリマー類、ヒドロキシプロピルメチルセルロースフタレートが挙げられる。また、pH非依存性のエチルセルロースも使用することができる。これらは単独若しくは二種以上を組み合わせて、又はさらに、他の高分子化合物と組み合わせて一層又は二層以上の腸溶性被膜とすることができる。
【0011】
また、本発明の徐放性顆粒部(A)には、上記三成分の他、賦形剤、崩壊剤又は結合剤等顆粒成型に必要な添加剤を配合することが望ましい。
【0012】
本発明において、徐放性顆粒(A)の製法としては、特に制限されないが、例えば、アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンの三成分を混ぜ、これに成型に必要な任意の成分である上記の賦形剤、崩壊剤又は結合剤等を加えて混合、練合した後、押し出し造粒により棒状の顆粒とし、さらに球状顆粒に整粒し、これに上記腸溶性被膜を施せばよい。
【0013】
本発明において、非徐放性部(B)としては、アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリンを含有し、腸溶性被膜等の徐放化処理のないものであれば特に制限されず、例えば、顆粒、粉末等の形態をとるものが挙げられる。かかる非徐放性部(B)は、上記三成分以外に賦形剤、崩壊剤、結合剤等を含有させることができる。
【0014】
本発明の持続性錠剤は、上記徐放性顆粒部(A)と非徐放性部(B)を所定の割合で混合され、さらに適宜カフェイン剤、ビタミン剤、抗ヒスタミン剤、生薬等のかぜ薬に配合が許容されている成分及び成型に必要な賦形剤、崩壊剤、結合剤、滑沢剤及びコーティング剤等の添加剤を加えて製錠することにより得られる。
【0015】
本発明の持続性錠剤中、徐放性顆粒部(A)と非徐放性部(B)の配合比率としては、特に制限されないが、(A):(B)が3:7〜7:3が好ましく、特に、4:6〜6:4が好ましい。
【0016】
本発明の持続性錠剤において、アセトアミノフェン、リン酸ジヒドロコデイン及びdl−塩酸メチルエフェドリン三成分の配合量は、特に制限されず、1回投与時の錠剤数によっても異なる。したがって、1回投与時の服用量が1日2回の服用で確実な効能効果が期待できる量とするのが好ましく、特に、1回投与量の配合量が1日3回服用の普通製剤の1.5倍とするのが好ましい。具体的には一般用医薬品製造(輸入)承認基準のかぜ薬承認基準で定められる1日最大分量の1/2量を配合するのが好ましく、1995年の基準に従えばアセトアミノフェン450mg、リン酸ジヒドロコデイン12mg、dl−塩酸メチルエフェドリン30mgを配合するのが好ましい。
【0017】
【発明の効果】
本発明によれば、アセトアミノフェン、リン酸ジヒドロコデイン、dl−塩酸メチルエフェドリンの投与量が1日3回服用の普通製剤の1.5倍であるにもかかわらず、その最高血中濃度は普通製剤の最高血中濃度以下に抑えられ、さらに血中濃度の持続時間も普通製剤よりも長く維持され、1日2回服用が可能となり、薬剤の飲み忘れを防ぎ、ひいてはかぜの諸症状の改善に寄与するものである。また、本製剤は服用後、胃の中で速やかに崩壊して非徐放性部が溶解すると共に、徐放性顆粒部の顆粒が胃中に放出されるが、顆粒は錠剤に比べて消化管移動の変動を受けにくいため、より安定した吸収が期待される。
【0018】
【実施例】
以下実施例を上げて本発明をさらに具体的に説明するが、本発明はこれに限定されるものではない。
【0019】
実施例1
下記の徐放性部の成分及び分量をとり、造粒機にて混合、練合した後、押し出し造粒機(不二パウダル社製ファインリュウザー)を用いて棒状の顆粒となし、さらに球形整粒機(不二パウダル社製マルメライザー)にて球形顆粒を製した。この顆粒にメタアクリル酸コポリマーSのエタノール溶液(2kg中140gのメタアクリル酸コポリマーS及びその他の成分として、グリセリン脂肪酸エステル、タルク、ステアリン酸マグネシウムを含む)を重量比で40%、流動層装置(フロイント産業社製グラット)を用いて噴霧コーティングし、さらにヒドロキシプロピルメチルセルロース及びポリエチレングリコール6000を重量比で20%、流動層装置にてコーティングした。最後にメタアクリル酸コポリマーSを同様にして重量比で7%、積層し、徐放性顆粒を製造した。
【0020】
次に徐放性顆粒の成分力価を測定し、アセトアミノフェン450g、リン酸ジヒドロコデイン12g、dl−塩酸メチルエフェドリン30gに対応する徐放性顆粒をとり、下記の非徐放性部の成分及び分量を加えて混合した後、打錠し、直径9.5mm、1錠400mgの素錠を製した後、通気型コーティング装置(フロイント産業社製ハイコーター)によりヒドロキシプロピルメチルセルロースのコーティングを施し、1錠420mgの持続性錠剤を製した。得られた錠剤は、3錠中にアセトアミノフェン450mg、リン酸ジヒドロコデイン12mg、dl−塩酸メチルエフェドリン30mg含有し、それぞれ50%が徐放性顆粒に、また50%が非徐放性部に配合されている。
【0021】
【表1】
【0022】
【表2】
【0023】
比較例1
実施例1と血漿中濃度を比較するため、服用量が同じになるようにした非徐放性製剤(普通製剤)を製した。すなわち、下記の成分及び分量を錠剤製造の常法に従い、湿式造粒したのち、打錠し、直径9.5mm、1錠400mgの素錠を製した。さらに、ヒドロキシプロピルメチルセルロースにてフィルムコーティングを施し、1錠420mgのフィルムコーティング錠を製した。得られた錠剤は3錠中アセトアミノフェン450mg、リン酸ジヒドロコデイン12mg、dl−塩酸メチルエフェドリン30mg含有されている。
【0024】
【表3】
【0025】
試験例
実施例1及び比較例1で得た錠剤3錠(アセトアミノフェン450mg、リン酸ジヒドロコデイン12mg、dl−塩酸メチルエフェドリン30mg対応量)を一夜絶食した健常人5名に投与し、アセトアミノフェンの血漿中濃度を測定し、比較した。その結果を図1に示した。
【0026】
図1より、実施例1で得られた持続性錠剤の最高血漿中濃度は、普通製剤の最高血漿中濃度(比較例1で得た非徐放性製剤の血漿中濃度を1日3回投与に換算するため2/3を乗じた)よりも低く抑えられ、さらに普通製剤の投与8時間後の血漿中濃度以上の濃度が実施例1では投与12時間後も維持された。
以上のことから、本発明による製剤は1日2回投与が可能であり、かつ安全性も高いことを示している。
【図面の簡単な説明】
【図1】本発明製剤の持続性を示す図である。
【符号の説明】
(1)普通製剤
(2)本発明の持続性錠剤[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a long-acting cold medicine tablet comprising acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride.
[0002]
[Prior art]
Acetaminophen, dihydrocodeine phosphate, and dl-methylephedrine hydrochloride are listed in the standard for the manufacture and import of over-the-counter drugs (1995). Caffeine, vitamin, antihistamine It is a component widely used in general cold medicines in combination with herbal medicines. The use and dosage of cold medicine is usually 3 times a day, but in order to prevent forgetting to take the drug and to take it with certainty, it is desirable to develop a preparation with a reduced number of times taken twice a day. Cold medicines that are taken twice a day are already on the market, but some of these preparations are ingredients that are outside the standards for approval of cold medicines that require caution when taking them as over-the-counter drugs taken by an unspecified number of people. In addition, in addition to the “Guidelines for the design and evaluation of sustained-release preparations (orally administered preparations)” (Pharmaceutical Examination No. 1 No. 5 dated March 11, 1988), undesired components are released slowly. It has become.
[0003]
The form of a cold medicine that reduces the number of doses by sustained release may be tablets, capsules, granules, but tablets are suitable in view of adhesion to the throat and esophageal mucosa and ease of administration. From the viewpoint of reducing the damage of the sustained-release film caused by chewing during administration or reducing the influence of gastrointestinal tract movement, granules or capsules filled with granules are superior to tablets. Considering these factors, the formulation is ideally in the form of a tablet that releases granules in the stomach.
In general, in order to take 3 times a day twice a day, the core granule or tablet containing the active ingredient is coated with a controlled release coating to maintain the drug concentration in the plasma and reduce the number of doses. I am trying.
[0004]
However, when controlling the release by controlling the release of a plurality of components, the difficulty in designing the formulation doubles. In particular, when components with different solubility such as acetaminophen, dihydrocodeine phosphate, and dl-methylephedrine hydrochloride are included that are susceptible to the first-pass effect, these components are gradually released to obtain the desired blood concentration. Thus, it is extremely difficult to design a formulation. For this reason, there are no known tablets that have been formulated twice a day by sustained release by blending these three ingredients up to the maximum amount of the approval criteria for cold medicine, which is a blending amount that can be expected to have a certain efficacy effect. .
[0005]
Therefore, it is listed in the “Cold Drug Approval Criteria”, and has been used for a long time as a cold drug, and contains the highest amount of cold drug approval standard with highly safe acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride. A cold medicine with the function of releasing controlled-release granules in the stomach by rapid disintegration after taking, while taking a tablet form that is easy to take while reducing the dose to twice a day by pharmacological ingenuity It is meaningful to develop and market it.
[0006]
[Problems to be solved by the invention]
Accordingly, the present invention contains acetaminophen, dihydrocodeine phosphate, and dl-methylephedrine hydrochloride, which have been confirmed as safety-approved reference ingredients for cold medicine, and is equivalent to taking 3 times a day by taking 2 times a day. It is an object of the present invention to provide a long-lasting cold medicine in the form of a tablet that can be easily taken so that the above-described effects are obtained.
[0007]
[Means for Solving the Problems]
In such a situation, the present inventors conducted extensive studies, and as a result, enteric coating was applied to granules containing acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride to form a sustained release portion, By adding a non-sustained-release part containing phen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride as a readily soluble granule or powder at a certain ratio, and adding tablets necessary for molding, the blood concentration It was found that a tablet for taking twice a day can be obtained with a peak value of no more than the blood concentration of a regular preparation taken three times a day and having a sustained blood concentration.
[0008]
That is, the present invention comprises (A) an enteric coating containing acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride, and containing at least one selected from methacrylic acid copolymers and hydroxypropylmethylcellulose phthalate. comprising Te sustained release granules unit; and (B) acetaminophen, non-sustained release portion have a sustained release granules unit containing phosphate dihydrocodeine and dl- methylephedrine hydrochloride ephedrine (a) and non-sustained release A sustained-action cold medicine tablet in which the blending ratio of the part (B) is 4: 6 to 6: 4 is provided.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the sustained-release granule part (A) needs to be a granule containing acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride and having an enteric coating.
[0010]
The enteric coating component is not particularly limited, and is a component that dissolves at a pH of 5 to 7, for example, methacrylic acid methyl methacrylate copolymer [methacrylic acid copolymer L (trade name; Eudragit L), methacrylic acid copolymer S (Trade name: Eudragit S), methacrylic acid ethyl acrylate copolymer [methacrylic acid copolymer LD (trade name; Eudragit L30D-55)], and the like, and hydroxypropyl methylcellulose phthalate. Further, pH-independent ethyl cellulose can also be used. These can be used alone or in combination of two or more, or further combined with other polymer compounds to form one or more enteric coatings.
[0011]
Moreover, it is desirable that the sustained release granule part (A) of the present invention is blended with additives necessary for granulation such as an excipient, a disintegrant or a binder in addition to the above three components.
[0012]
In the present invention, the production method of the sustained-release granules (A) is not particularly limited, but, for example, three components of acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride are mixed, and any of the necessary components for molding is mixed. Add the above-mentioned excipients, disintegrants, binders, etc., which are the ingredients, mix and knead, then extrude granulate into rod-like granules, further spheronize into granules, and apply the enteric coating to this That's fine.
[0013]
In the present invention, the non-sustained-release part (B) is not particularly limited as long as it contains acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride and does not have a sustained release treatment such as an enteric coating. For example, what takes the form of a granule, powder, etc. is mentioned. This non-sustained-release part (B) can contain an excipient | filler, a disintegrating agent, a binder other than the said three component.
[0014]
In the sustained-release tablet of the present invention, the sustained-release granule part (A) and the non-sustained-release part (B) are mixed at a predetermined ratio, and further cold medicines such as caffeine agent, vitamin agent, antihistamine agent, herbal medicine, etc. In addition, ingredients that are allowed to be blended and additives necessary for molding, additives such as disintegrants, binders, lubricants, and coating agents are added to produce tablets.
[0015]
In the continuous tablet of the present invention, the mixing ratio of the sustained release granule part (A) and the non-sustained release part (B) is not particularly limited, but (A) :( B) is from 3: 7 to 7: 3 is preferable, and 4: 6 to 6: 4 is particularly preferable.
[0016]
In the continuous tablet of the present invention, the blending amounts of acetaminophen, dihydrocodeine phosphate and dl-methylephedrine hydrochloride are not particularly limited, and differ depending on the number of tablets at the time of single administration. Therefore, it is preferable that the dose at the time of single administration is an amount that can be expected to have a certain effect by taking twice a day. It is preferably 1.5 times. Specifically, it is preferable to formulate ½ amount of the daily maximum amount stipulated in the cold drug approval standard of the over-the-counter drug manufacturing (import) approval standard. According to the 1995 standard, acetaminophen 450 mg, phosphorus It is preferable to add 12 mg of dihydrocodeine acid and 30 mg of dl-methylephedrine hydrochloride.
[0017]
【The invention's effect】
According to the present invention, although the dose of acetaminophen, dihydrocodeine phosphate, dl-methylephedrine hydrochloride is 1.5 times that of the usual preparation taken three times a day, its maximum blood concentration is normal. It is kept below the maximum blood concentration of the preparation, and the duration of the blood concentration is maintained longer than that of the normal preparation. It can be taken twice a day, preventing the user from forgetting to take the medicine, and improving various symptoms of colds. It contributes to. In addition, after taking this preparation, it disintegrates quickly in the stomach and dissolves the non-sustained release part, and the granules in the sustained release part are released into the stomach. Since it is less susceptible to fluctuations in tube movement, more stable absorption is expected.
[0018]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.
[0019]
Example 1
Take the components and amount of the following sustained-release part, mix and knead in a granulator, then use a push granulator (Fuji Rousdar made by Fuji Powder Co., Ltd.) to form rod-shaped granules, and further spherical Spherical granules were produced with a granulator (Malmerizer manufactured by Fuji Paudal). A 40% by weight fluidized bed apparatus (containing 200 g of methacrylic acid copolymer S in 2 kg and glycerin fatty acid ester, talc, and magnesium stearate as other components) in an ethanol solution of methacrylic acid copolymer S in these granules. Spray coating using Freund Sangyo Co., Ltd.), and further, 20% by weight of hydroxypropylmethylcellulose and polyethylene glycol 6000 were coated in a fluidized bed apparatus. Finally, 7% by weight of methacrylic acid copolymer S was laminated in the same manner to produce sustained release granules.
[0020]
Next, the component titer of the sustained-release granules was measured, and the sustained-release granules corresponding to 450 g of acetaminophen, 12 g of dihydrocodeine phosphate, and 30 g of dl-methylephedrine hydrochloride were taken. After adding the amount and mixing, tableting was carried out to prepare uncoated tablets with a diameter of 9.5 mm and one tablet of 400 mg, followed by coating with hydroxypropylmethylcellulose by a breathable coating apparatus (High coater manufactured by Freund Corporation). Sustained tablets of 420 mg were made. The obtained tablets contain 450 mg of acetaminophen, 12 mg of dihydrocodeine phosphate, and 30 mg of dl-methylephedrine hydrochloride in 3 tablets, each containing 50% in sustained release granules and 50% in the non-sustained release part. Has been.
[0021]
[Table 1]
[0022]
[Table 2]
[0023]
Comparative Example 1
In order to compare the plasma concentration with that of Example 1, a non-sustained release preparation (ordinary preparation) having the same dose was prepared. That is, the following ingredients and amounts were wet-granulated according to conventional methods for tablet production, and then tableted to produce uncoated tablets with a diameter of 9.5 mm and one tablet of 400 mg. Furthermore, film coating was performed with hydroxypropylmethylcellulose to produce 420 mg film-coated tablets. The obtained tablet contains 450 mg of acetaminophen, 12 mg of dihydrocodeine phosphate, and 30 mg of dl-methylephedrine hydrochloride in 3 tablets.
[0024]
[Table 3]
[0025]
Test Example 3 tablets (acetaminophen 450 mg,
[0026]
From FIG. 1, the maximum plasma concentration of the sustained-release tablet obtained in Example 1 is the maximum plasma concentration of the normal preparation (the plasma concentration of the non-sustained release preparation obtained in Comparative Example 1 was administered three times a day. In addition, in Example 1, a concentration higher than the plasma concentration at 8 hours after administration of the normal preparation was maintained at 12 hours after administration.
From the above, it is shown that the preparation according to the present invention can be administered twice a day and has high safety.
[Brief description of the drawings]
FIG. 1 is a graph showing the persistence of the preparation of the present invention.
[Explanation of symbols]
(1) Ordinary formulation (2) Sustainable tablet of the present invention
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30152795A JP3850473B2 (en) | 1995-11-20 | 1995-11-20 | Persistent tablets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30152795A JP3850473B2 (en) | 1995-11-20 | 1995-11-20 | Persistent tablets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09143074A JPH09143074A (en) | 1997-06-03 |
| JP3850473B2 true JP3850473B2 (en) | 2006-11-29 |
Family
ID=17898012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30152795A Expired - Fee Related JP3850473B2 (en) | 1995-11-20 | 1995-11-20 | Persistent tablets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3850473B2 (en) |
-
1995
- 1995-11-20 JP JP30152795A patent/JP3850473B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09143074A (en) | 1997-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5656295A (en) | Controlled release oxycodone compositions | |
| ES2606463T3 (en) | Combination of levodopa / carbidopa immediate release and controlled release dosage forms | |
| US5508042A (en) | Controlled release oxycodone compositions | |
| US7374781B2 (en) | Sustained release formulations containing acetaminophen and tramadol | |
| JP3825991B2 (en) | Long-acting orally administered opioid formulation | |
| TWI241911B (en) | Sustained release ranolazine formulations | |
| US20080031948A1 (en) | Sustained-release bupropion and bupropion/mecamylamine tablets | |
| HU226670B1 (en) | Method for producing orally administered, solid pharmaceutical products with controlled release of the active substance | |
| US20210386677A1 (en) | Delayed release deferiprone tablets and methods of using the same | |
| EP3013327B1 (en) | Pharmaceutical capsule composite formulation comprising tadalafil and tamsulosin | |
| CN101193638A (en) | Combinations for Benign Prostatic Hypertrophy Therapy | |
| JPH07258085A (en) | Sustained release formulation containing alfuzosin hydrochloride | |
| US20120003307A1 (en) | Levetiracetam controlled release composition | |
| JP2019532960A (en) | Esomeprazole-containing composite capsule and method for producing the same | |
| WO2015011161A1 (en) | Anti-tuberculosis stable pharmaceutical composition in a form of a coated tablet comprising granules of isoniazid and granules of rifapentine and its process of preparation | |
| EP2010158B1 (en) | Controlled release formulations comprising uncoated discrete unit(s) and an extended release matrix | |
| JP2001163774A (en) | Solid preparation including bromhexine hydrochloride | |
| US20090202633A1 (en) | Extended release formulations of guaifenesin | |
| WO2006088864A1 (en) | Controlled release compositions comprising levetiracetam | |
| JP3850473B2 (en) | Persistent tablets | |
| JP2016539171A (en) | Sustained release pharmaceutical composition comprising acebrofilin and hydrophobic sustained release base | |
| US20090155358A1 (en) | Pharmaceutical compositions of short-acting hypnotic agents in modified-release forms and the procedures to prepare the mentioned formulation | |
| JP6618595B1 (en) | Caffeine and hyoscyamine-containing pharmaceutical composition and method for producing the same | |
| JPH04273816A (en) | Pulse-releasing nucleated tablet | |
| JP7761480B2 (en) | solid dosage forms |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060613 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060803 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060829 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060830 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090908 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120908 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130908 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |