take medicines called "nitrates" (such as nitroglycerin) use Avenue medicine named "poppers" like amyl nitrate or amyl nitrite, and butyl nitrate take any medicines termed guanylate cyclase stimulators which include riociguat (Adempas) are allergic to sildenafil, as contained in Cialis® and Revatio, or any of your components in Cialis®.Tend not t