Cialis Daily will come in doses of 2. Nitrates come as tablets, sublingual under the tongue tablets, sprays, patches, pastes, and ointments. After taking a single tablet, some of the active ingredient of Cialis remains in your body for more than 2 days. It’s also sometimes used to treat pulmonary hypertension high blood pressure in the blood vessels that supply the lungs. Cialis will be available by prescription only.CIALIS for Use as Needed. Creatinine clearance 30 to 50 mL/min: A starting dose of 5 mg not more than once per day is recommended, and the maximum dose is 10 mg not more than once in every 48 hours. Creatinine clearance less than 30 mL/min or on hemodialysis: The maximum dose is 5 mg not more than once in every 72 hours [see . 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 prescribe a 5-mg dose. If the headache. indigestion. back pain. muscle pain. flushing. stuffy nose. Patients who get back pain and muscle aches usually get them 12 to 24 hours after taking Cialis and these usually go away by.