It could be a sign of physical or psychological conditions such as fear of sexual failure, anxiety, depression, low self-esteem, or stress. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail. Continue to take tadalafil even if you feel well. A: If you experience dizziness and altered vision after taking Cialis 20 mg tablet, it is advised to avoid driving or be cautious while driving. Maintain a healthy weight, and exercise regularly. Symptoms include chest pain, dizziness, fatigue, and swelling in the legs and ankles.What is Tadalafil (Cialis)? Drug Facts Common Brands Cialis Drug Class PDE-5 inhibitor Controlled Substance Classification Not a controlled medication Generic Status No lower-cost generic available Availability Prescription only How Tadalafil (Cialis) works Tadalafil (Cialis) is a phosphodiesterase-5 enzyme (PDE-5) test1.rug: india. Generic Cialis is called tadalafil, which is the active ingredient in Cialis. Cialis is Food and Drug Administration (FDA) approved to treat erectile dysfunction (ED) and benign prostatic. Cialis is a prescription medication containing the active ingredient tadalafil. Cialis belongs to a group of medications known as phosphodiesterase-5 (PDE-5) inhibitors. Healthcare providers commonly prescribe tadalafil to treat erectile dysfunction (ED).