What is the mechanism of action behind Cialis?
Cialis is a PDE-5 inhibitor which makes it a relative to other ED drugs like Viagra and Levitra. This class of drugs works by stimulating the blood flow into penis upon sexual arousal which results in strong, firm and durable erections suitable for penetrative sex. PDE-5 is a chemical that relaxes penile muscles making the blood flow out from the penis shaft after sexual intercourse and returning it to flaccid state. When there’s not enough blood flowing into the penis, this chemical restricts from achieving a firm erection. By inhibiting the activity of PDE-5, Cialis makes fore blood to flow into the penis, which leads to a strong and durable erection.
