Cialis is a prescription medication containing the active ingredient tadalafil. Cialis belongs to a group of medications known as phosphodiesterase-5 (PDE-5) inhibitors. Healthcare providers commonly prescribe tadalafil to treat erectile dysfunction (ED).Your doctor will probably tell you not to take tadalafil if you are taking street drugs containing nitrates. Children—Use is not recommended. It may be taken with or without food. One of these is PAH. Take both tablets at the same time each day.WebMar 24, · Cialis is taken as an oral tablet, either as a low dose daily medication or as a higher-dose “on-demand” medication. It is the brand name for tadalafil, a medication . WebFeb 22, · Cialis comes as oral tablets that are available in four strengths: milligrams (mg), 5 mg, 10 mg, and 20 mg. Recommended dosage for Cialis Typically, . WebJan 4, · Cialis (tadalafil) is prescribed to treat erectile dysfunction and symptoms of benign prostatic hyperplasia. It comes as a tablet that’s taken as needed or once per .Dosing The dose of this medicine will be different for different patients. What special dietary instructions should I follow? Tadalafil has been extensively studied for ED. Tell your doctor if any of these symptoms are severe or do not go away: headache. Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient.