AMORPHOUS AND CRYSTALLINE FORMS OF RIVASTIGMINE HYDROGENTARTRATE

摘要

Rivastigmine hydrogentartrate in amorphous form or in a crystalline form characterized by an X-ray powder diffraction pattern exhibiting peaks at 2T values of 5.1, 14.7, 16.5, 17.6, 18.6, 20.4, 21.1° ± 0.2° (Form I), or 2T values of 9.5, 11.3, 13.2, 14.1, 15.5, 19.1 20.0° ± 0.2° (Form II), methods for its preparation and pharmaceutical compositions comprising the same.