Do not take more or less of it or take it more often than prescribed by your doctor. For treatment of pulmonary arterial hypertension: Adults—40 milligrams mg two 20 mg tablets taken once a day. Dosing Guidelines Typical Cialis dosages will differ depending on the conditions it’s prescribed to treat as well as other factors. Tadalafil is also sometimes taken once a day every day without regard to timing of sexual activity. With PAH, high blood pressure develops when a blockage in the arteries within the lung limits normal blood flow. Ask your pharmacist for a list of the ingredients.The recommended starting dose for Cialis intended for once daily use is mg, take at the same time each day, without regard to timing of sexual activity. This may be increased to 5mg/day based on need and tolerability. May be taken with or without food. Cialis is available as a generic, under the name tadalafil. 3. · Available strengths of Cialis ( mg, 5 mg, 10 mg, 20 mg) Cialis tablets come in four strengths: milligrams (mg), 5 mg, 10 mg, and 20 mg. What are the typical dosages of Cialis? Brand-name Cialis: $20 – $80 per dose (5mg, 10mg, 20mg) Generic Cialis (tadalafil): $11 – $44 per dose (5mg, 10mg, 20mg) Daily generic Cialis (tadalafil): $8 per dose (mg, 5mg).