If this condition is not treated quickly, tissue damage and permanent loss of the ability to have an erection could result. That’s why we send your medication inside a plain delivery box so no one will know what’s inside. It should not be used more frequently than 3 times per week. Once-a-day use with 5 mg dosing or less may be considered for some people with mild-to-moderate kidney problems. Do I need a prescription for Tadalafil? If this occurs, you should seek medical attention immediately. Alcohol: Consumption of alcohol may decrease the ability to achieve an erection and may also temporarily decrease blood pressure, causing dizziness and fainting.28 rows · Buying prescription drugs online is easy with Canada Pharmacy. All you . Ordering Cialis from an online Canadian pharmacy is a simple process. Add your desired strength and quantity to your cart and visit our sign-up page or log in to an existing account to fill your prescription. For more information, visit our Order Process .