Mechanism of action[ edit ] Penile erection during sexual stimulation is caused by increased penile blood flow resulting from the relaxation of penile arteries and the smooth muscle of the corpus cavernosum. Take tadalafil exactly as directed. Take tadalafil at around the same time every day. Other uses for this medicine This medication may be prescribed for other uses; ask your doctor or pharmacist for more information. For this purpose, one dose works for up to 72 hours. Furthermore, the longer half-life is the basis for tadalafil’s daily therapeutic use in treating pulmonary arterial hypertension.AdThe Only End-To-End Payables Automation Solution. Cuts 80% Of Manual Payables Tasks. Integrates With Your ERP For Instant Payment Reconciliation, Saving Your Team test1.ru has been visited by 10K+ users in the past month. Tadalafil (Cialis) is used to treat erectile dysfunction (ED, impotence; inability to get or keep an erection), and the symptoms of benign prostatic hyperplasia (BPH; an enlarged prostate) which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency in adult men. 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.