The main active ingredient in Viagra is sildenafil citrate. Sildenafil citrate belongs to a class of medications known as phosphodiesterase type 5 (PDE5) inhibitors. It works by inhibiting the enzyme PDE5, which regulates blood flow in the penis. This inhibition allows for increased blood flow into the penis when a man is sexually aroused, helping to facilitate the achievement and maintenance of an erection.
Sildenafil citrate is the key component responsible for the therapeutic effects of Viagra in treating erectile dysfunction (ED). It is available in various strengths, typically ranging from 25 mg to 100 mg per tablet, and is prescribed based on individual response, tolerance, and the severity of ED.
It's important to note that sildenafil citrate is not a hormone or aphrodisiac and does not directly cause an erection without sexual stimulation. Viagra enhances the body's natural response to sexual stimulation by improving blood flow to the penis, thereby aiding in achieving and sustaining an erection suitable for sexual activity.
As with any medication, it's essential to use Viagra (sildenafil) as prescribed by a healthcare provider to ensure safety and effectiveness.