Abstract: The present invention is directed to nanostructured (nanoparticulated) Olmesartan or its pharmaceutically acceptable ester, preferable Olmesartan Medoxomil, or co-crystal compositions, process for the preparation thereof and pharmaceutical compositions containing them. The nanoparticles of Olmesartan or its pharmaceutically acceptable ester, preferable Olmesartan Medoxomil, or co-crystal according to the invention have an average particle size of less than about 500 nm. Olmesartan Medoxomil is an angiotensin II receptor antagonist used to treat high blood pressure. The prodrug Olmesartan Medoxomil is marketed worldwide by Daiichi Sankyo, Ltd. and in the United States by Daiichi Sankyo, Inc.

Abstract: The present invention is directed to nanostructured (nanoparticulated) Candesartan or its pharmaceutically acceptable ester, preferable Candesartan Cilexetil, or co-crystal compositions, process for the preparation thereof and pharmaceutical compositions containing them. The nanoparticles of Candesartan or its pharmaceutically acceptable ester, preferable Candesartan Cilexetil, or co-crystal according to the invention have an average particle size of less than about 500 nm. Candesartan Cilexetil is a prodrug, is hydrolyzed to Candesartan during absorption from the gastrointestinal tract. Candesartan is a selective AT1 subtype angiotensin II receptor antagonist.

Abstract: The present invention is directed to nanostructured (nanoparticulated) Telmisartan compositions, process for the preparation thereof and pharmaceutical compositions containing them. The nanoparticles of Telmisartan according to the invention have an average particle size of less than about 600 nm. Telmisartan is an angiotensin II receptor antagonist (ARB) used in the management of hypertension.

Abstract: The present invention is directed to nanostructured (nanoparticulated) Sildenafil base, its pharmaceutically acceptable salts and co-crystals, compositions containing them, process for the preparation thereof and pharmaceutical compositions containing them. The nanoparticles of Sildenafil base, its pharmaceutically acceptable salts and co-crystals, compositions containing them according to the invention have an average particle size of less than about 500 nm. Sildenafil citrate is inhibiting cGMP specific phosphodiesterase type 5 (PDEV), an enzyme that regulates blood flow in the penis. The compositions of the invention are useful in the treatment of male or female sexual dysfunction and pulmonary arterial hypertension (PAH).