Cialis relaxes muscles of the blood vessels and increases blood flow to
particular areas of the body.

Cialis is used to treat erectile dysfunction (impotence) and symptoms of
benign prostatic hypertrophy (enlarged prostate).

Another brand of tadalafil is Adcirca, which is used to treat pulmonary
arterial hypertension and improve exercise capacity in men and women. **Do not
take Cialis while also taking Adcirca, unless your doctor tells you to.**





Get emergency medical help if you have **signs of an allergic reaction to
Cialis:** hives; difficulty breathing; swelling of your face, lips, tongue, or
throat.

**Stop and get medical help at once if you have nausea, chest pain, or
dizziness during sex.** You could be having a life-threatening side effect.

Stop using this medicine and call your doctor at once if you have:

  * a light-headed feeling, like you might pass out;

  * an erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis);

  * vision changes or sudden vision loss;

  * ringing in your ears or sudden hearing loss; or

  * **heart attack symptoms** \- chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating.

Common Cialis side effects may include:

  * headache;

  * flushing (warmth, redness, or tingly feeling);

  * nausea, upset stomach;

  * stuffy nose; or

  * muscle pain, back pain, pain in your arms, legs, or back.

This is not a complete list of side effects and others may occur. Call your
doctor for medical advice about side effects. You may report side effects to
FDA at 1-800-FDA-1088.

Cialis side effects (more detail)