take medicines known as "nitrates" (such as nitroglycerin) use street medicines named "poppers" like amyl nitrate or amyl nitrite, and butyl nitrate get any medicines identified as guanylate cyclase stimulators such as riociguat (Adempas) are allergic to sildenafil, as contained in Cialis® and Revatio, or any in the elements in Cialis®.Non è not