Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate.Xanax, which is a benzodiazepine, contains the active drug alprazolam. Xanax Perro sometimes cause low blood pressure, dizziness, and fainting. Viagra may also lower your blood press… Read More