NANOSTRUCTURED SILDENAFIL BASE, ITS PHARMACEUTICALLY ACCEPTABLE SALTS AND CO-CRYSTALS, COMPOSITIONS OF THEM, PROCESS FOR THE PREPARATION THEREOF AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM
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United States of America Patent
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Issued Date -
May 24, 2012
app pub date -
Jun 18, 2010
filing date -
Jun 19, 2009
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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).
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