Do not stop taking tadalafil without talking to your doctor. Do not take more or less of it or take it more often than prescribed by your doctor. Plus, the whole process is hassle-free. Your doctor will help you decide the best time for you to take tadalafil before sexual activity. A small number of patients taking Cialis also reported abnormal vision.$. Total: $. Contact. After taking a single tablet, some of the active ingredient of Cialis remains in your body for more than 2 days. Cialis is a brand of tadalafil, one of the most popular medications to treat erectile dysfunction (ED).It was first approved in In the past Cialis site use to give a voucher and, with the prescription of your Dr. the pharmacy will give for free the Cialis as prescribed by your Dr. I had couple times used this voucher but now I verified again and . Cialis: mg, 5 mg, 10 mg, and 20 mg, taken as needed. The cost of the medication is from $ per month for Cialis and from $40 per month for tadalafil. Online consultations are free of charge.