Take all of the tablets for your daily dose at one time each day; do not divide the tablets to take as separate doses. When the blood vessel muscle cells relax, this expands the vessel and increases blood flow; this effect is referred to as vasodilation. Obesity Additionally, certain risk factors increase the risk of ED, such as smoking , lack of exercise, and drug or alcohol use. Cialis is a brand-name prescription medication. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.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. Find Lowest Prices Cialis Coupons, Prices, and Savings Card Generic Names: Tadalafil Tadalafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). Learn. How much does tadalafil or cialis cost near you? Find the best tadalafil or cialis prices near you now with our cost comparison tool and start saving today. 5 MG; 10 MG; MG; Quantity 30 tablets. 30 tablets; 90 tablets; 10 .