Other ED pills stay active in the body for hours. For further information contact your pharmacist or Eli Lilly and Company directly. If your prescription is for Cialis Daily, it can help to take it at the same time each day to maintain a steady level of tadalafil in your body. The result is difficulty getting hard or hard enough for sex. 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. If you take nitrates in any form, or are on treatment for pulmonary hypertension , you should not take tadalafil. Will Cialis be prescription or OTC over-the-counter?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. AdGet your ED medication shipped in an unmarked package within 4 hours at $0 delivery fee. Sorry no cure – not in our vocabulary! Find legit ED treatment affordably and conveniently. CIALIS for once daily use is a lower dose you take every day. • Do not take CIALIS more than one time each day. • Take one CIALIS tablet every day at about the same time of day. You may attempt sexual activity at any time between doses. • If you miss a dose, you may take it when you remember but do not take more than one dose per day.