just take medicines named "nitrates" (which include nitroglycerin) use Avenue drugs known as "poppers" such as amyl nitrate or amyl nitrite, and butyl nitrate take any medicines called guanylate cyclase stimulators such as riociguat (Adempas) are allergic to sildenafil, as contained in Cialis® and Revatio, or any on the components in Cialis®.Some