take medicines termed "nitrates" (like nitroglycerin) use street prescription drugs named "poppers" which include amyl nitrate or amyl nitrite, and butyl nitrate get any medicines termed guanylate cyclase stimulators including riociguat (Adempas) are allergic to sildenafil, as contained in Viagra® and Revatio, or any from the ingredients in Viagra®. https://annei196wdi1.idblogz.com/profile