摘要:
The present invention is to provide a sustained release preparation comprising a drug-containing core substance and a multilayered coating layer covering the core substance, wherein all adjacent layers in the multilayered coating layer contain mutually different hydrophobic organic compound-water-soluble polymer mixtures; and, a method of producing a sustained release preparation, having a multilayered coating layer in which adjacent layers contain different hydrophobic organic compound-water-soluble polymer mixtures, which comprises spray-coating a solution containing a hydrophobic organic compound-water-soluble polymer mixture onto a drug-containing core substance, continuing to spray-coat a solution containing a different hydrophobic organic compound-water-soluble polymer mixture onto the resulting coating layer, and repeating this step.
摘要:
The present invention discloses sustained release particles having a mean particle size of 300 &mgr;m, or less, comprising a drug-containing core substance coated with a mixed coating of a hydrophobic organic compound-water-insoluble polymer, which prevents sticking during compression molding when producing oral sustained release tablets, a preparation method of those sustained release particles, and a preparation method of tablets using those sustained release particles.
摘要:
The present invention discloses an efficient preparation method of spherical fine particles containing a drug for an easily-swallowed, controlled-release preparation comprising the production of drug-containing spherical fine particles (mean particle size: 60-200 &mgr;m) by adding a binder solution to a mixture containing an excipient powder having the property of retaining solvent (and preferably having a mean length of the long axis of 40 &mgr;m or less) and a drug powder (preferably having a mean length of the long axis of 50 &mgr;m or less), followed by high-speed mixing granulation.
摘要:
A pharmaceutical preparation in the form of a coated capsule which can release contents of a capsule at a lower part of the digestive tract comprising (a) a hard capsule containing at least an acidic substance, (b) a polymer film soluble at low pH which is formed on a surface of said hard capsule, and (c) an enteric coating film which is formed on a surface of said polymer film soluble at low pH. According to the pharmaceutical preparation of the present invention, any kind of a medicament can be delivered to any desired site between the upper part of the small intestine and the lower part of the large intestine in the digestive tract by controlling the amount of polymer(s) used for the polymer film soluble at low pH and/or by selecting the kind of the polymer film soluble at low pH and/or the acidic substance without any complicated requirements for each medicament.
摘要:
A preparation capable of releasing a medicinal substance at a targeted site in the intestine, wherein the preparation dose not releases medicinal substance in endogastri at all, but can quickly release a medicinal substance when it reaches the desired site in the intestine after a certain period of time from discharge of the preparation from the stomach, and wherein a core material containing a medicinal substance is coated with a mixed film of a hydrophobic organic compound—an enteric polymer. The preparation is useful for a local therapy of inflammatory disease in the intestine such as ulcerative colitis or Crohn's disease, or an oral administrative therapy with a medicinal substance of a peptide which is apt to be decomposed chemically or enzymatically in any site except for a specific site in the intestine such as the large intestine, or with a medicinal substance whose absorption site in the intestine is limited, or the like, because a medicinal substance can be delivered selectively to a specific site in the intestine.
摘要:
A developer comprising at least one polyvalent metal salt of a nuclear substituted salicylic acid of the following general formula is provided. ##STR1## In the formula, R.sub.1 represents an alkyl group having from 1 to 12 carbon atoms, R.sub.2 represents a hydrogen atom or an alkyl group having from 1 to 12 carbon atoms, R.sub.3 represents a hydrogen atom or a methyl group provided that at least one of R.sub.1 and R.sub.2 is a secondary butyl group, a secondary hexyl group, an isohexyl group, a secondary octyl group, an isononyl group, a secondary decyl group, a secondary dodecyl group or an isododecyl group and the total number of the carbon atoms in R.sub.1, R.sub.2 and R.sub.3 is from 9 to 18, M is a polyvalent metal atom, and m is a valence of M. An aqueous dispersion containing the developer and a method for preparing the developer are also described.
摘要:
A process for producing a high quality di(aryloxy)alkane with a high yield by the use of readily commercially available materials, without using any particular solvent or agent and by means of a simple operation and a general apparatus is provided, which process comprises subjecting a halogenated alkane of the formula (II)X--A--Y (II)wherein X and Y each represent a halogen atom and A represents a lower alkylene group, and a phenol of the formula (III) ##STR1## wherein R.sub.1 to R.sub.5 each are same or different, represent hydrogen, halogen, lower alkyl, lower alkoxy, carboxylic acid salt, acyl or nitro group, and may form a ring in conjunction of two adjacent groups,to condensation reaction in the presence of an alkali in an aqueous medium to form a di(aryloxy)alkane of the formula (I) ##STR2## and is characterized (i) by carrying out the condensation reaction in a molar ratio of the compound of the formula (II): the phenol of the formula (III): the alkali in terms of monovalent base of 1:1.5 to 3.0:1.5 to 3.0; or(ii) by carrying out the condensation reaction of the above (i) and adjusting the quantity of the aqueous medium phase after completion of the reaction can be 35% or less based on the oily phase; or(iii) by carrying out the condensation reaction of the above (i), feeding at least the alkali among the reaction components with progress of the reaction and adjusting the quantity of the aqueous medium phase as described in the above (ii).
摘要:
This invention provides an external skin preparation with high safety aimed at wrinkle improvement and wrinkle prevention. Specifically, the invention relates to an external skin preparation comprising, as an active ingredient, a carotenoid.
摘要:
A heat sensitive recording material comprising a substrate and a recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor reactive with the dye to form a color when contacted therewith, the recording material being characterized in that, as the color acceptor is used at least one compound selected from the group consisting of 4-hydroxy-4'-isopropyloxydiphenylsulfone, 4,4'-(1,3-dimethylbutylidene) bisphenol, 4,4'-(1-phenylethylidene)bisphenol, 4,4'-(p-phenylenediisopropylidene)bisphenol and 4,4'-(m-phenylenediisopropylidene) bisphenol, and to the recording layer is added at least one of a heat-fusible substance represented by the formula [I] ##STR1## wherein X is hydrogen atom, halogen atom, C.sub.1.about.4 alkyl or C.sub.1.about.4 alkoxy.