In trials of the drug, individuals taking Cialis saw a significant reduction in the frequency and urgency of urination and improved urine flow. Alternatively, Cialis may be prescribed as an as-needed treatment for ED, to be taken before sexual activity. What’s the difference between the conditions? The FDA has also approved tadalafil for treatment of both benign prostatic hypertrophy and erectile dysfunction where the two conditions co-exist. Your clinician needs to know your blood pressure to provide a medically appropriate treatment plan for erectile dysfunction.Transfer your prescription for Cialis (Brand for Tadalafil, Oral Tablet) on Amazon Pharmacy. FREE SHIPPING for Prime members. Tadalafil is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). It is sometimes known by its generic name tadalafil, and sometimes known by its trade name, Cialis. There are also other brands of this medicine available. Tadalafil (Generic for Cialis) Tablets · 20mg · 6-day supply With insurance est. $ Estimated insurance price. Final price varies with your insurance. Without insurance .