Avoid eating a large meal or a lot of food, as this can slow down the effects of the drug. Continue to take tadalafil even if you feel well. Also tell your doctor if you or any of your family members have or have ever had an eye disease such as retinitis pigmentosa an inherited eye condition that causes loss of vision or if you have ever had sudden severe vision loss, especially if you were told that the vision loss was caused by a blockage of blood flow to the nerves that help you see. Patients should seek prompt medical attention if their erection lasts longer than four hours. Soon, in , ICOS received a patent for compound IC structurally unlike sildenafil and vardenafil , and Phase 1 clinical trials began in Check the healthdirect’s medicines section for more information about tadalafil. Tadalafil has been extensively studied for ED.Cialis, known by its scientific name ‘Tadalafil’, is a medication commonly known for treating erectile dysfunction (ED) and symptoms of benign prostatic hyperplasia (BPH). While it’s primary usage might be clear, the plethora of benefits it brings to one’s health is profound and worth exploring. AdWith RexMD you’re saving time and money with our ED delivery. Get started now. Reliable E.D. meds prescribed by real doctors. Get your free & private online visit today. the medicine, and on your health condition. How Should I Take CIALIS for Both ED and the Symptoms of BPH? For both ED and the symptoms of BPH, CIALIS is taken once daily. • 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.