Drug of the Week
Each week, Dr. Mike features a commonly used medication or class of drugs. Learn what they are used for, how they work, and any news updates or controversies.
Viagra (Sildenafil), along with Cialis (tadalafil) and Levitra (vardenafil), is used to treat erectile dysfunction. These medications, which belong to class of drugs known as phosphodiesterase-5 inhibitors (PDE-5 inhibitors), can be taken at least an hour before you plan to be sexually active. PDE-5 inhibitors have a high success rate, are easy to use, and often result in an erection if you are sexually stimulated. Also read useful questions about Viagra and another ED Pills.
How PDE-5 Inhibitors Work
For the duration of an erection, blood fills tissue in your penis, causing it to enlarge and become stiff. The PDE-5 inhibitors relax smooth muscle, allowing your penis to fill with blood.
