Patent ID: 7473804

Claim:
A process for the preparation of a crystalline form of atomoxetine hydrochloride characterized by a powder x-ray diffraction pattern having peaks at about 13.7, 17.3, 18.7, 21.1, 22.6, 24.0, 27.3, 28.4 and 29.3±0.2 degrees two-theta comprising the steps of: a) combining atomoxetine hydrochloride Form B with acetone to obtain a mixture; and b) maintaining the mixture for a sufficient time to obtain the crystalline form of atomoxetine hydrochloride characterized by a powder x-ray diffraction pattern having peaks at about 13.7, 17.3, 18.7, 21.1, 22.6, 24.0, 27.3, 28.4 and 29.3±0.2 degrees two-theta.