Verapamil is a member of the calcium-channel blocker drug class. It functions by letting your heart and blood vessel muscles relax, which lessens the force of your heart's pumping action. In order to regulate heart rate, verapamil also improves blood and oxygen flow to the heart and decreases cardiac electrical activity.
Tadalafil helps a man achieve and maintain an erection by boosting blood flow to the penis when combined with sexual stimulation. Male sexual function issues, such as impotence or erectile dysfunction (ED), are treated with tadalafil.
Vardenafil is used to treat men with erectile dysfunction, commonly referred to as impotence—the inability to get or keep an erection. Vardenafil is a medication that is categorized as a phosphodiesterase (PDE) inhibitor. Blood flow to the penis is increased during sexual stimulation. An erection is the outcome of the increased blood flow.