Your doctor will help you decide the best time for you to take tadalafil before sexual activity. Can Cialis be used with other treatments for impotence? The FDA has also approved tadalafil for treatment of both benign prostatic hypertrophy and erectile dysfunction where the two conditions co-exist. Cialis Daily will come in doses of 2. What should I do if I forget a dose? If you take nitrates in any form, or are on treatment for pulmonary hypertension , you should not take tadalafil.Cialis and generic Cialis, known as tadalafil, are available from online services, along with other ED treatment options for people looking to buy ED medication online. Cialis comes in several different strengths, including: milligrams (mg) 5 mg. 10 mg. 20 mg. The cost for these different strengths depends on whether you have insurance, your individual plan. Below are answers to some frequently asked questions about tadalafil and cost. Does tadalafil’s price depend on the strength I use ( mg, 5 mg, 10 mg, or 20 mg)?