consider medicines known as "nitrates" (including nitroglycerin) use Road medications named "poppers" like amyl nitrate or amyl nitrite, and butyl nitrate choose any medicines termed guanylate cyclase stimulators such as riociguat (Adempas) are allergic to sildenafil, as contained in Viagra® and Revatio, or any with the elements in Viagra®.DailyM