Sildenafil belongs to a group of medicines that delay the action of enzymes called phosphodiesterases that can interfere with erectile function. Sildenafil is used to treat men with erectile dysfunction (also called sexual impotence) because it helps to maintain an erection that is produced when a man is sexually excited. Without physical stimulation of the penis, sildenafil will not work to cause an erection. Sildenafil is not indicated for use in women.
Click here to read the Viagra Prescribing Information for healthcare professionals.
Click here to read the Viagra Patient Information.