# US 4,397,835 A · Enterosoluble hard-capsulated medicaments

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- Number: US 4,397,835 A
- Document ID: US4397835A
- Status: Granted
- Kind: A
- Application number: 06/372,791
- Filed: 1982-04-28
- Granted: 1983-08-09
- Earliest claimed: 1979-08-24
- Assignees: Shionogi & Co., Ltd.; Shin-Etsu Chemical Co., Ltd.
- Inventors: Yasushi Takagishi; Yoshio Doi; Noboru Hoshi
- Web page: https://patentgrep.com/patent/US4397835A

## CPC

- A61K 9/4858: {Organic compounds}
- A61K 9/4816: {Wall or shell material}
- A61K 9/485: {Inorganic compounds}
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)

## Abstract

The invention provides a novel means for overcoming the problem of undue and irregular delay in the exhibition of the effect of medicine when a patient is administrated with an enterosoluble hard-capsulated medicament. The unexpected discovery that the key parameter ruling the smooth transfer of an enterosoluble capsule from the stomach to the intestinal canals is the overall specific gravity of the capsule has led to the establishment of the invention which proposes an enterosoluble hard-capsulated medicament having an overall specific gravity of at least 1.05 or, preferably, at least 1.10.

## Claims

### Claim 1

An enterosoluble encapsulated medicament which is weighted with a weighting agent so that the entire encapsulated medicament possesses an overall specific gravity of at least 1.05, and the medicament is a suspension of the effective ingredient in an oily base, and the enterosoluble encapsulating material consists essentially of an enterosoluble cellulose derivative selected from the group consisting of cellulose acetate phthalate, hydroxypropylmethylcellulose phthalate, methylcellulose phthalate and cellulose acetate succinate.