Furthermore, the longer half-life is the basis for tadalafil’s daily therapeutic use in treating pulmonary arterial hypertension. Always discuss with your health care practitioner ALL of the medications you are taking prescription and over-the-counter that way, you can receive the best advice for your own situation. Persons surnamed “Cialis” objected to Eli Lilly and Company’s so naming the drug, but the company has maintained that the drug’s trade name is unrelated to the surname. Tadalafil is also sometimes taken once a day every day without regard to timing of sexual activity. Resources and support See the Healthy Male site for more information about erectile dysfunction and its treatment.Tadalafil (Cialis) 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). Tadalafil works by helping to relax the blood vessels in the penis, allowing blood to flow into the penis, and causing an erection. The Lemonaid Pharmacy can deliver it to you for $2/pill, including FREE delivery. Our medical team can prescribe it in a 20mg, 60mg or mg dose. To choose the best ED . 4. Bottom Line. Cialis is used to treat erectile dysfunction (ED) and to reduce symptoms of benign prostatic hyperplasia (BPH). One ‘as needed’ tablet lasts for 36 hours or Cialis is available as a lower dosage that can be taken on a daily basis, eliminating the need to ‘plan for sex’. 5.