Cocrystals of Lorcaserin hydrochloride and an organic diacid, in particular with (+)-di-p-toluoyl-D-tartaric acid； (+)-camphoric acid； and oxalic acid, processes for their preparation, their therapeutical indications, as well as, pharmaceutical compositions containing them. It also relates to a resolution process of lorcaserin which goes through the formation of the cocrystal of (R)-Lorcaserin hydrochloride with (+)-di-p-toluoyl-D-tartaric.
