Delayed action preparation

Details Delayed action preparation Delayed action preparation

1996-04-22

1997-08-05

Hulina, Amy

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

424492, 424496, 424497, A61K 950

Patent

active

056540094

ABSTRACT:
The invention relates to a delayed action preparation which comprises a core comprising a drug and a swelling agent and an outer membrane comprising a biodegradable high molecular weight substance characterized in that the swelling agent is contained in a sufficient amount to cause a explosion of the outer membrane of biodegradable high molecular weight substance at a definite time after administration. This preparation provides for free control over the timing of drug release and is suited for administration not only by the oral route but also by the intramuscular, subcutaneous and other routes.

REFERENCES:
patent: 4871549 (1989-10-01), Ueda et al.
patent: 5061492 (1991-10-01), Okada et al.

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