Thiadiazole derivatives active on the central nervous system, process for their preparation and pharmaceutical compositions containing them.
Thiadiazole derivs. of formula (I) and their pharmaceutically acceptable salts are new. R = 1-5C alkyl 5-6C cycloalkyl or phenyl (opt. substd. by 1 or 2 halo, pref. Cl, or by a lower alkyl or alkoxy).