If you are antipathetic to Tadalafil or any other element present in the Efil 5 tablet. If you are taking vasodilators analogous as amyl nitrate or nitrates or medicine containing riociguat. Ask your croaker if you are not sure which these medicines are. If you have a given history of any heart problem analogous as heart failure. still, heart attack in the last 90 days or breathlessness or casket pain during sexual exertion, if you had a stroke in the formerly 6 months. Still, low blood pressure, stroke or heart blockage, if you have a given history of liver conditions. If you have a given history of eye problems like retinitis colours (a heritable complaint that may beget loss of vision).