The starting dose we generally recommend is the 10mg pill. Seek medical advice from a healthcare professional if you are taking any other medications prior to starting tadalafil. What are the side effects of tadalafil? Tadalafil dosing also depends on whether or not it is taken daily or as-needed. Typically, the 5 and 10 mg doses may be prescribed daily but not the 20 mg dose.Hims Cialis (3+) from Hims Type: tablet Delivery time: 2–5 business days Prescription needed: yes Dosage: 5 mg Usage: take as needed or daily at a low dosage GET STARTED WITH HIMS MNT ‘s. 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 erectile dysfunction (ED). Take tadalafil (Cialis) as prescribed by your provider. If you’re taking tadalafil (Cialis) as-needed for ED, you should take no more than one dose per day. The effects of tadalafil (Cialis) should last for up to 36 hours after a dose. Taking this medication more often can raise your risk for serious side effects, such as priapism or vision.