Alfuzosin is in a group of drugs called alpha-adrenergic blockers. Alfuzosin helps relax the muscles in the prostate and bladder neck, making it easier to urinate.

Alfuzosin is used to treat benign prostatic hyperplasia (enlarged prostate).

Alfuzosin may also be used for other purposes not listed in this medication guide.

Do not use alfuzosin if you have severe liver disease, or if you are also using ketoconazole (Nizoral), itraconazole (Sporanox), or ritonavir (Norvir). Alfuzosin can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. Stop using alfuzosin and call your doctor at once if you have new or worsening chest pain, or if you feel light-headed.

Alfuzosin can affect the pupils of your eyes during cataract surgery. If you have cataract surgery during your treatment with alfuzosin, tell the surgeon ahead of time that you are taking this medication. Do not stop using alfuzosin before surgery unless your surgeon tells you to.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using alfuzosin and call your doctor at once if you have any of these serious side effects:

- nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);

- sore throat, cough, runny or stuffy nose.