Method of preparing controlled long-acting pharmaceutical...

Details Method of preparing controlled long-acting pharmaceutical... Method of preparing controlled long-acting pharmaceutical...

A - Human Necessities

61

K

167/169

A61K 9/22 (2006.01) A61K 9/14 (2006.01) A61K 9/20 (2006.01) A61K 9/26 (2006.01)

Patent

CA 1297409

Abstract of The Disclosure A method of preparing a multiplicity of controlled, long-acting release pharmaceutical tablets, each containing a therapeutic agent and a cellulosic ether carrier base material is shown. The method includes the steps of adding a quantity of cellulose ether base material such as hydroxypropyl methylcellulose and an active therapeutic agent to form a mixture, thoroughly and uniformly mixing that mixture, discontinuing the mixing, permitting the uniform mixture to stand for a period of time, typically two to twenty-four hours or longer, sufficient to cause the therapeutic agent to become bonded to the carrier base material and compressing portions of the mixture to form the solid unit dose tablets. The advantage of the method is that the time release of each tablet from a given batch of formulation and the time release characteristics of tablets prepared in different batches, will be substantially more uniform and comparable.

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