Cialis and Viagra (generic names: Tadalafil/Sildenafil) are used to treat erectile dysfunction, more commonly known as impotence. A man is impotent if he cannot achieve or sustain an erect penis for sexual activity. Cialis and Viagra are oral treatments for erectile dysfunction.

Unlike previously approved treatments for impotence, Viagra and Cialis do not directly cause penis erection, but affect the response to sexual stimulation. The drugs act by enhancing the smooth muscle relaxation using nitric oxide, a chemical that is normally released in response to sexual stimulation. This smooth muscle relaxation allows increased blood flow into certain areas of the penis leading to an erection.

A single Viagra or Cialis pill will give you up to 36 hours to choose the moment that's right for you and your partner.

Recommendations

Follow the directions for using this medicine provided by your doctor. Take Cialis and Viagra exactly as directed.

Take one tablet by mouth about 20 minutes to 40 minutes before you plan to have sex. If you take Cialis or Viagra after a high-fat meal (such as fish & chips, cheeseburger or French fries), the medicine may take a little longer to start working.

The dose may need adjustment in some cases.

Keep Cialis and Viagra at room temperature, away from light and moisture.

Precautions

Before taking Cialis or Viagra, tell your doctor if:

you are allergic to any medicines;
you are taking any nitrate-containing drugs; or amyl nitrite;
you have heart, liver, kidney or blood vessel problems; or any disease or deformity of your penis.

Ingredients

Active ingredients: sildenafil (Viagra) and tadalafil (Cialis).