Microsealed pharmaceutical delivery device

A microsealed pharmaceutical delivery device comprising a sectioned length of flexible medical grade silicone polymer hollow tubing as a biologically acceptable polymer container with as many perforations in the wall of the tubing when unsealed at each end as to expose up to 40% of an inner biologically acceptable silicone polymer matrix contained with the biologically acceptable polymer container, said biologically acceptable silicone polymer matrix having the formula ##EQU11## wherein R is alkoxy having 1-7 carbon atoms, alkyl having 1-10 carbon atoms, phenyl, vinyl, or allyl, wherein n is about 100-5000 and having 10-200 micron microsealed compartments throughout, said microsealed compartments containing pharmaceutical saturated 30-60% polyethylene glycol molecular weight 380-420 in water as a hydrophilic solvent system wherein the ratio of the partition coefficient of the pharmaceutical between the hydrophilic solvent system and inner biologically acceptable silicone polymer matrix to the solubility of the pharmaceutical in the hydrophilic solvent system is between 1 and 10.sup..sup.-4 (ml/mcg), said pharmaceutical being diffusible through the inner biologically acceptable silicone polymer matrix and biologically acceptable polymer container at a constant rate when the microsealed pharmaceutical delivery device is in an aqueous environment, said hydrophilic solvent being non-diffusible through the inner biologically acceptable silicone polymer matrix and biologically acceptable polymer container.