hydrochloride or diethylamine hydrochloride tertiary alkylamine for example triethylamine hydrochloride aromatic amine hydrochloride for example aniline hydrochloride or heteroaromatic hydrochlorides for example pyridine hydrochloride or 2 3 5 collidine hydrochloride in one embodiment the present invention provides for a method of preparing sertraline hydrochloride polymorphs in particular form 1 11 and v from sertraline base comprising the following steps a an amine hydrochloride is dissolved or suspended in a suitable solvent b a solution of sertraline base in said solvent is mixed therewith c the resulting mixture is kept at room temperature or heated to a maximum temperature corresponding to the reflux temperature of said solvent and maintained at said temperature for a period of time sufficient to cause precipitation of a crystalline form of sertraline hydrochloride d said mixture if previously heated is cooled to room temperature e sertraline hydrochloride thus formed is separated by filtration in another embodiment the present invention provides for a method of preparing sertraline hydrochloride polymorphs in particular form i ii and v from sertraline base comprising the following steps a a solution of sertraline base is prepared by dissolving it in a suitable solvent b an amine hydrochloride is added to said solution c the resulting mixture is kept at room temperature or heated to a maximum temperature corresponding to the reflux temperature of.