WebOct 12, · How Cialis Works. Tadalafil and other PDE5 inhibitors primarily work by inducing muscle relaxation. Tadalafil stops the breakdown of a chemical responsible for .What Is Cialis? You should only be treated with one of these products at a time. You should take tadalafil one time a day. How Effective Is Cialis? Other uses for this medicine This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.WebFeb 22, · The normal dosage of Cialis for occasional use in treating ED is 10 mg taken before sexual activity. If you have side effects with the mg dose, your doctor may . WebOct 12, · How Cialis Works. Tadalafil and other PDE5 inhibitors primarily work by inducing muscle relaxation. Tadalafil stops the breakdown of a chemical responsible for . WebJan 4, · The typical dose for once-daily Cialis for ED is milligrams (mg) to 5 mg. When used as needed for ED, the usual Cialis dose is 10 mg (with a maximum daily .If you are taking tadalafil to treat PAH or BPH, follow your doctor’s directions and the guidelines in this paragraph. Follow your doctor’s directions carefully, and ask your doctor or pharmacist to explain any part you do not understand. Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Tadalafil has been extensively studied for ED. Tadalafil is also sometimes taken once a day every day without regard to timing of sexual activity. If you ever need emergency medical treatment for a heart problem, the health care providers who treat you will need to know when you last took tadalafil. Tadalafil is sometimes taken as needed, usually at least 30 minutes before sexual activity and not more often than once every 24 hours.