Paroxetine methanesulfonate which specified X-ray diffractometry or infrared signals is new. Paroxetine methanesulfonate, which has (i) characteristic infrared signals at 1603, 1513, 1194, 1045, 946, 830, 776, 601, 554 and 539 cm-1 and/or (ii) characteristic X-ray diffractometry signals at 8.3, 10.5, 15.6, 16.3, 17.7, 18.2, 19.8, 20.4, 21.5, 22.0, 22.4, 23.8, 24.4, 25.0, 25.3, 25.8, 26.6, 30.0, 30.2 and 31.6 degrees2theta, is new. An Independent claim is included for a medicament comprising 1-200 mg of paroxetine methanesulfonate, based on the free base, and a carrier.
Paroxetine methanesulfonate, useful in treatment of depression, neuroses and anxiety