摘要:
Disclosed herein is a pharmaceutical composition for oral absorption of polar drugs. The composition consists essentially of (a) at least one polar active substance having a bioavailability of less than 30% which is poorly absorptive through lipid membranes because of its high hydrophilicity and charged ion; (b) at least one organic alkalizing agent having an amino acid or polyol structure which shows alkalinity in aqueous solution and is ionically bonded to the polar active substance; and (c) at least one surfactant having a C6-18 fatty acid structure which has an HLB of 4 to 18. Alternatively, the composition consists essentially of (d) at least one organic alkalizing agent having the characteristics of both the organic alkalizing agent and the surfactant instead of the organic alkalizing agent and the surfactant. The composition enables polar active drugs to penetrate the gastro-intestinal membrane and oral dosage forms to be substituted for injections.
摘要:
A pharmaceutical composition comprising a cyclosporin solid-state microemulsion is disclosed. In a preferred embodiment, the composition comprises a cyclosporin microemulsion dispersed in an enteric carrier. The composition does not dissolve in external phases such as artificial gastric fluid, but dissolves rapidly in artificial intestinal fluid, whereby it releases the cyclosporin microemulsion, providing rapid delivery of cyclosporin. The composition effectively maintains a therapeutic blood concentration of cyclosporin with once a day dosing, providing for convenience of administration and avoiding adverse effects induced by increasing peak blood cyclosporin concentrations associated with conventional cyclosporin formulations.
摘要:
The present invention relates to a microemulsion preconcentrate composition comprising (1) cyclosporin as an active component; (2) alkyl ester of polycarboxylic acid and/or carboxylic acid ester of polyols as a lipophilic solvent; (3) oil; and (4) surfactant. The composition according to the present invention is characterized in that it dissolves in an external phase such as water, artificial gastric fluid and artificial intestinal fluid by controlling the mixing ratio of the components thereby to get the microemulsion form of inner phase diameter of 100 nm or below. The composition according to the present invention can be formulated as the dosage form of a soft capsule, a hard capsule sealed with a gelatin banding at the conjugated portion, or an oral liquid preparation for oral administration. Especially, if the cyclosporin microemulsion preconcentrate comprising cyclosporin, oil, lipophilic solvent and surfactant is formulated in a soft capsule according to the present invention, the resultant capsule removes the disadvantages of the prior arts showing the reactivity of hydrophilic solvent with gelatin shell of soft capsule and the volatility of hydrophilic solvent wherein the hydrophilic solvent was essential component in the composition according to the existing patents.
摘要:
The present invention relates to an inclusion compound of fumagillol derivative or its salt with hydroxypropyl-β-cyclodextrin or sulfobutylether-7-β-cyclodextrin, and pharmaceutical compositions comprising the same. The inclusion compound according to the present invention has superior water solubility and stability while exhibiting low toxicity, rendering it valuable as an anticancer agent or inhibitor of tumor metastasis.
摘要:
The present invention relates to an inclusion compound of fumagillol derivative or its salt with hydroxypropyl-β-cyclodextrin or sulfobutylether-7-β-cyclodextrin, and pharmaceutical compositions comprising the same. The inclusion compound according to the present invention has superior water solubility and stability while exhibiting low toxicity, rendering it valuable as an anticancer agent or inhibitor of tumor metastasis.
摘要:
Disclosed herein is a process for preparing highly pure acarbose of formula (I) useful as medicine for the treatment of diabetes. The disclosed process comprises prepurifying an acarbose-containing solution using a synthetic adsorbent to produce a prepurified acarbose having an acarbose content of a predetermined level or more; and contacting the prepurified acarbose with a monodispersed, strongly acid cation exchanger, in one step, to absorb acarbose.
摘要:
The present invention relates to an inclusion compound of fumagillol derivative or its salt with hydroxypropyl-β-cyclodextrin or sulfobutylether-7-β-cyclodextrin, and pharmaceutical compositions comprising the same. The inclusion compound according to the present invention has superior water solubility and stability while exhibiting low toxicity, rendering it valuable as an anticancer agent or inhibitor of tumor metastasis.
摘要:
The present invention relates to an improved process for preparing simvastatin and more particularly, the improved process for preparing simvastatin expressed by formula 1 with high yield and high purity by performing the following sequential processes comprising: (i) hydrolysis of lovastatin as starting material with potassium t-butoxide in an organic solvent and small amount of water under a mild reaction condition, followed by lactonization of the obtained solid intermediate with preventing from formation of by-products; (ii) protection of an alcohol group with t-butyldimethylsilyl group which can be easily removed with concentrated hydrochloric acid without the formation of by-products; (iii) acylation of the obtained protected intermediate with acyloxytriphenyl phosphonium salt as an acylating agent under a mild reaction condition; and (iv) removal of the silyl protective group with a concentrated hydrochloric acid. The present invention is to provide the improved process of preparing simvastatin expressed by formula 1 environmentally sound, economically efficient, and industrially useful.
摘要:
The present invention relates to a thiazolidinedione derivative, represented in formula (1) below, pharmaceutically acceptable salts thereof, and/or pharmaceutically acceptable solvates thereof. Further, the present invention provides a pharmaceutical composition comprising the compound represented in formula (1) below, wherein: X represents a carbon or nitrogen atom, Y represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen, or an aryl group, Z represents an oxygen, nitrogen, or sulfur atom, and R1 and R2 each represent a hydrogen atom; or R1 and R2 together form a bond.
摘要:
Compounds useful as angiogenesis inhibiting agents and processes for their preparation are disclosed. In one embodiment, the compounds of the invention are represented by Formula 1: ##STR1## Also disclosed is a pharmaceutical composition for inhibiting angiogenesis in a mammal, said composition comprising a compound of Formula 1, or a pharmaceutically acceptable salt thereof, as an active ingredient.