Tell all of your healthcare providers that you take Cialis. Follow the directions on your prescription label carefully. Ask your healthcare provider if it is safe for you to have sexual activity. Generic Cialis helps you get and maintain your erections through a simple, daily dosage. Cialis and other medications for ED can cause indigestion, or heartburn. If taking Cialis for treating ED, stop sexual activity and get medical help right away if you get symptoms such as chest pain, dizziness, or nausea. This medication is not used by women.Cialis is a medication approved by the Food and Drug Administration (FDA) often used to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BPH) in those assigned male at birth. stockcam / Getty Images. What is generic Cialis? Generic Cialis is called tadalafil, which is the active ingredient in Cialis. Cialis is Food and Drug Administration (FDA) approved to treat. Healthline’s picks for the best places to buy Cialis online. Most user-friendly. Hims Cialis. (3+) from Hims. Delivery time: 2–5 business days. Prescription needed: yes. Accepts.