get medicines known as "nitrates" (such as nitroglycerin) use Road medicine termed "poppers" such as amyl nitrate or amyl nitrite, and butyl nitrate consider any medicines named guanylate cyclase stimulators for instance riociguat (Adempas) are allergic to sildenafil, as contained in Cialis® and Revatio, or any of your substances in Cialis®.La do