take medicines named "nitrates" (including nitroglycerin) use Avenue medicines named "poppers" like amyl nitrate or amyl nitrite, and butyl nitrate acquire any medicines identified as guanylate cyclase stimulators for example riociguat (Adempas) are allergic to sildenafil, as contained in Viagra® and Revatio, or any with the ingredients in Viagra®. https://helenr529gnu5.thebindingwiki.com/user