Sildenafil and Tadalafil should not be taken with nitrates ex nitroglycerin, isosorbide, Imdur , Nitro-Bid , Nitro-Dur , Nitrol ointment, Nitrolingual spray, Nitrostat , and Transderm Nitro , and some illegal street drugs called poppers such as amyl nitrate, butyl nitrate, or nitrite cialis no prescription
