Cialis is a prescription medication specifically used for the treatment of erectile dysfunction (ED). It functions by increasing blood flow and improving oxygen to the penis, aiding in the attainment of an erection. Cialis is not a cure for ED nor does it augment sexual desire, and it cannot protect against sexually transmitted infections (STIs) or prevent pregnancy.
Available only through prescription from a licensed healthcare provider, Cialis is comprised of the drug tadalafil, which may also be found in generic formulations.