How to take Cialis Daily: Take 1 tablet whole with a glass of water at the same time each day. Tadalafil and Cialis are medically equivalent but Tadalafil is available at a much lower cost. Usually men begin with the 5 mg dose and adjust as needed. Always discuss with your health care practitioner ALL of the medications you are taking prescription and over-the-counter that way, you can receive the best advice for your own situation. Cialis has a benefit over other erectile dysfunction medications because it is so quick to work, often effective enough to allow sexual intercourse just 20 minutes after taking the pill. The decision of availability is completely up to the company marketing the product.The recommended starting dose for Cialis intended for once daily use is mg, take at the same time each day, without regard to timing of sexual activity. This may be increased to 5mg/day based on need and tolerability. May be taken with or without food. Cialis is available as a generic, under the name tadalafil. 3. Tadalafil is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). It is sometimes known by its generic name tadalafil, and sometimes known by its trade name, Cialis. There are also other brands of this medicine available. Cialis Hour comes in two doses, either 10 mg or 20 mg. It is recommended to begin with the 10 mg tablet and continue if this is effective, as lower doses have less chance of side .