Is Viagra a Vasodilator

Yes, Viagra (sildenafil) is a vasodilator. It works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which increases blood flow to the penis during sexual arousal by relaxing the blood vessels. This mechanism helps to achieve and maintain an erection, making it effective for treating erectile dysfunction. However, its vasodilatory effects can also lead to lower blood pressure in some individuals.