Apart from treating ED, Cialis is also prescribed for benign prostatic hyperplasia, a condition characterized by an enlarged prostate. Some common side effects include headaches, back pain, nasal congestion, or flushing. The FDA has also approved tadalafil for treatment of both benign prostatic hypertrophy and erectile dysfunction where the two conditions co-exist. The combination of these medications with Cialis Tadalafil may add to the blood-pressure-lowering effect of these medications. You can report an adverse event either online, by regular mail or by fax, using the contact information at the bottom of this page. Prolonged erections can be dangerous.Tadalafil, or generic Cialis, is most commonly used to treat erectile dysfunction (ED). However, it’s also used to treat benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension. Our Canadian Pharmacy carries the largest selection of prescription medications including brand name prescription drugs and their generic label counterparts. Come discover why we are the largest and most trusted online Canadian Pharmacy. Cialis: Brand/Generic: $ – $ – 5 – 10 – 20 mg: View Product: Advair Diskus: Brand/Generic. 28 rows · Cialis: Brand/Generic: $ – $ – 5 – 10 – 20 mg: View Product: .