Before using Tadalafil

Some medical conditions may interact with Tadalafil . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

• if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
• if you have allergies to medicines, foods, or other substances
• if you have heart failure, high blood pressure, an irregular heartbeat, kidney or liver problems (eg, dialysis), or stomach ulcers
• if you have bleeding problems, blood cell problems (eg, sickle cell anemia), multiple myeloma, or leukemia
• you have a deformed penis or Peyronie disease, or have had an erection that lasted more than 4 hours
• if you have retinitis pigmentosa, other eye disease, or if you have ever had severe vision loss

Some MEDICINES MAY INTERACT with Tadalafil . Tell your health care provider if you are taking any other medicines, especially any of the following:

• Azole antifungals (eg, ketoconazole), HIV protease inhibitors (eg, indinavir), ketolides (eg, telithromycin), or macrolides (eg, erythromycin) because actions and side effects, such as prolonged erection, dizziness upon standing, or vision problems, may be increased
• Nitrates (eg, nitroglycerin, isosorbide) because blood pressure could drop suddenly to unsafe levels, causing dizziness, fainting, heart attack, or stroke
• Alpha-blockers (eg, doxazosin) because dizziness, especially upon standing, or fainting may occur

This may not be a complete list of all interactions that may occur. Ask your health care provider if Tadalafil may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.