If your prescription is for Cialis Daily, it can help to take it at the same time each day to maintain a steady level of tadalafil in your body. Who should not take Cialis? The Cialis effective time — how long it will aid you in getting an erection — is 24 to 36 hours. How will Cialis be supplied? Some people buy tadalafil online without a prescription.Ya puede comprar Cialis contrareembolso y con envío en 24 horas rápido, discreto y urgente a cualquier sitio de España sin receta. Somos una farmacia fiable de venta de . Tadalafil (Cialis) is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). Tadalafil works by helping to relax the blood vessels in the penis, allowing blood to flow into the penis, and causing an erection. CIALIS for once daily use is a lower dose you take every day. • Do not take CIALIS more than one time each day. • Take one CIALIS tablet every day at about the same time of day. You may attempt sexual activity at any time between doses. • If you miss a dose, you may take it when you remember but do not take more than one dose per day.