The present invention provides polymorphic forms of aliskiren hemifumarate, and processes for preparation thereof and for the preparation of the amorphous form of aliskiren hemifumarate. The present invention also provides pharmaceutical compositions comprising the aliskiren hemifumarate crystalline forms T1, T3 or T4, T5, T6, T7, T8 and at least one pharmaceutically acceptable excipient, and the use of these pharmaceutical compositions in the treatment of hypertension.
