take medicines referred to as "nitrates" (for example nitroglycerin) use Road medicine termed "poppers" for instance amyl nitrate or amyl nitrite, and butyl nitrate consider any medicines termed guanylate cyclase stimulators like riociguat (Adempas) are allergic to sildenafil, as contained in Viagra® and Revatio, or any of the elements in Viagra®… Read More