We will ask about your experience with generic Cialis as part of your visit. Some may find that Cialis works in two hours and takes the medicine two hours before sexual activity. A higher dose of tadalafil is needed if your body does not respond to the recommended dose. Privacy: Confirm that your personal data and payment details are confidential. An erection results from an increase in blood flow to the penis.Our medical team can prescribe it online and our pharmacy can mail it to you in 5mg, 10mg and 20mg dose. An even lower cost option for ED medicines is generic sildenafil 20mg . Sildenafil (Viagra) 25mg, 50mg, mg. Cialis. Cialis Daily. Typical cost per pill. $2/pill with our mail order partner. Prices at Walgreens/CVS can be $18/pill. $ $ Cialis is approved by the FDA to treat erectile dysfunction (ED). Our medical team can prescribe Cialis 5mg, 10mg, and 20mg. The starting dose we generally recommend is 10mg. Tadalafil is the name for the active chemical ingredient in Cialis. PDE-5 inhibitors is the name of the group of medicines.