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just take medicines referred to as "nitrates" (like nitroglycerin) use Road medicines known as "poppers" such as amyl nitrate or amyl nitrite, and butyl nitrate choose any medicines termed guanylate cyclase stimulators for instance riociguat (Adempas) are allergic to sildenafil, as contained in Viagra® and Revatio, or any on the components in Viag