Tell your doctor about all your current medicines. Many drugs can increase your risk of very low blood pressure while taking Uroxatral, especially:
heart or blood pressure medication;
nitrate medication (such as nitroglycerin); or
sildenafil (Viagra) and other erectile dysfunction medicines.
This list is not complete. Many other drugs can interact with alfuzosin, and some drugs should not be used at the same time. Tell your doctor about all your current medicines and any medicine you start or stop using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.
 Uroxatral drug interactions (more detail)
