Positive pressure drug releasing device

摘要

A positive pressure long-term drug delivery device particularly useful for the intravaginal or intrauterine release of a drug capable of passing through a diffusion membrane and being absorbed by the vaginal or uterine epithelium. The device includes a tubular casing having a plunger urged by a compression spring to create a continuous positive pressure on a drug in liquid form within the chamber of the casing, a supported membrane at one end of the casing through which such drug diffuses at a predetermined rate, and resilient elements at the opposite end of the casing for facilitating retention of the device throughout the term of administration of the drug.