BPH is caused by an enlarged prostate. Brand-name versions of the drug approved for PAH include Adcirca. Nitrates come as tablets, sublingual under the tongue tablets, sprays, patches, pastes, and ointments. If you are taking tadalafil to treat erectile dysfunction, follow your doctor’s directions and the guidelines in this paragraph. Keep out of the reach of children. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately or get emergency medical treatment, and avoid sexual activity until your doctor tells you otherwise. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail.What is Cialis? Cialis relaxes muscles of the blood vessels and increases blood flow to particular areas of the body. Cialis is used to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate). Thway Lay Student at No.3 hight School Naaldwijk, South Holland, Netherlands. Join to view profile. In combination with sexual stimulation, tadalafil works by increasing blood flow to the penis to help a man get and keep an fil is also used to treat the symptoms of an enlarged.