Oral medicines for ED usually work well and cause few side effects. Tadalafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension to improve your ability to exercise. Cialis is a brand-name prescription medication. Some might experience headaches, back pain, or flushed skin. Which drug for erectile dysfunction?Cialis lasts up to 36 hours in the body, while Viagra lasts 4–6 hours in the body. Both are taken 30 minutes before sex. Cialis can cause limb pain, while Viagra can cause vision change, rash. Cialis, known by its scientific name ‘Tadalafil’, is a medication commonly known for treating erectile dysfunction (ED) and symptoms of benign prostatic hyperplasia (BPH). While it’s primary usage might be clear, the plethora of benefits it brings to one’s health is profound and worth exploring. Cialis Super Active is a generic drug. Tadalafil (generic Cialis) may cost less than brand-name Cialis. (Generics tend to cost less than brand-name drugs.) The price you pay for generic Cialis also depends on your treatment plan, if.