Other uses for this medicine This medication may be prescribed for other uses; ask your doctor or pharmacist for more information. One of these is PAH. Brand-name versions of the drug approved for PAH include Adcirca. How Effective Is Cialis? The results showed the combination to be even more effective than either medication alone. Talk to your doctor about which dosing schedule is right for you. Ask your pharmacist for a list of the ingredients.Cialis doesn’t work right away. For the as-needed dose, plan to take Cialis at least 30 minutes before sexual activity, but bear in mind it may take as long as 2 hours to take effect. 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. 5 mg 10 mg 20 mg The cost for these different strengths depends on whether you have insurance, your individual plan coverage, and your treatment plan. .