Cialis can be taken every 24 hours, but remember that the Cialis half-life is 36 hours. Cialis is the branded medication, Tadalafil is an unbranded version made by pharmaceutical companies other than Lilly. Like the other details of your sex life, what works for you will be unique to your needs. Pulmonary arterial hypertension can develop on its own or with other cardiovascular diseases, such as left heart disease LHD , sickle cell disease SCD and its variants, chronic obstructive pulmonary disease COPD and conditions such as pulmonary embolism PE. Cialis and Tadalafil are also prescription-only medicines. Remember that this wikiHow quiz is informational, and your results should not be considered a medical diagnosis. Another clinical trial with more than 1, men using tadalafil for up to 24 months found no serious adverse effects to long term use.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). Learn more about Cialis oral. 1. This is a generic drug. The average cost for 30 Tablet(s), 5mg each of the generic (tadalafil) is $ You can buy tadalafil at the discounted price of $ by using the MDRx coupon, a savings of 93%. Even if this drug is covered by Medicare or your insurance, we recommend you compare prices. Most popular Low price Walmart $ retail Save 94% $ Get free savings Walgreens $ retail Save 89% $ Get free savings.