Nizagara is a medication primarily used to treat erectile dysfunction (ED) in adult men. The active ingredient in Nizagara is sildenafil citrate, which is also found in Viagra. Nizagara works as a phosphodiesterase type 5 (PDE5) inhibitor, a type of medication that enhances the effects of nitric oxide, a natural chemical produced by your body that relaxes muscles in the penis. This relaxation allows for increased blood flow, which is essential for achieving and maintaining an erection suitable for sexual activity. Erectile dysfunction, the condition Nizagara is designed to treat, is characterized by the persistent inability to attain or sustain an erection firm enough for satisfying sexual intercourse. ED can occur at any age and can have a significant impact on a person?s quality of life and psychological well-being.