take medicines identified as "nitrates" (like nitroglycerin) use street medicine termed "poppers" like amyl nitrate or amyl nitrite, and butyl nitrate just take any medicines named guanylate cyclase stimulators such as riociguat (Adempas) are allergic to sildenafil, as contained in Cialis® and Revatio, or any of your components in Cialis®.Talk to… Read More