Hydrochloride monohydrate crystalline tiagabine, its preparation and use.

A DESCRIBED R-isomer of a HYDROCHLORIDE ACID N- (4,4-DI (3METILTIENO-2-yl) but-3-ENIL-nipecotic) WITH GENERIC NAME tiagabine hydrochloride, A PROCESS FOR THEIR PREPARATION, COMPOSITIONS that they contain it and its therapeutic use as an agent antiepileptic