Tadalafil is a medication used for treating male sexual function issues (impotence or erectile dysfunction ED).In conjunction with sexual stimulation, it functions to increase the blood flow to the penis to benefit men get and maintain an erection.
Viagra is a drug that contains sildenafil.It is part of a group of drugs known as phosphodiesterase type 5 (PDE5) inhibitors.(A group of drugs refers to a set of drugs that perform similarly.)Viagra is a drug that increases the flow of blood to the penis. This aids in making sure you maintain an erection.