Cialis belongs to a group of medications called phosphodiesterase type 5 inhibitors, which relax muscles and improve blood flow in certain parts of the body. Cialis is most often prescribed to men with erectile dysfunction (ED) and is taken prior to expec...

Cialis works in a similar way to other erectile dysfunction treatments. It relaxes muscles around your penis, improving blood flow and making it easier to get and keep erections when you’re aroused.

Cialis is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, tadalafil works by increasing blood flow to the penis to help a man get and keep an erection.