Abstract: Provided are stable pharmaceutical compositions comprising from about 2.5% to about 20% of a 2-aza-bicyclo[3.3.0]-octane-3-carboxylic acid derivative by weight of the composition and at least one pharmaceutically acceptable excipient, wherein the composition preferably has a total weight of less than 100 mg. Also provided are stable pharmaceutical compositions comprising a 2-aza-bicyclo[3.3.0]-octane-3-carboxylic acid derivative in a stabilizing-effective concentration and at least one pharmaceutically acceptable excipient. Further provided are methods for improving the stability of a pharmaceutical composition and methods for treating hypertension by administering a therapeutically effective amount of the stable pharmaceutical compositions of the invention.

Abstract: The invention is directed to easily dissolved, stable dose proportional pharmaceutical compositions, comprising granulated memantine and methods of preparing the same. In particular, the invention is directed to granulated memantine pharmaceutical compositions in the form of film coated tablets.