Sildenafil citrate, an ingredient in Suhagra, is a member of the group of drugs called phosphodiesterase type 5 inhibitors. It functions by preventing phosphodiesterase type 5, an enzyme that typically breaks down cyclic guanosine monophosphate. The synthesis of cGMP, which is produced when the penis releases nitric oxide, relaxes the smooth muscles in the penile blood vessels, causing them to expand and enhance blood flow. Keep out of children's reach and store in a cold, dry location. Don't stop taking this medication or adjust the dosage. Consult the physician.
