How can I buy tadalafil? When administered in combination with aspirin, tadalafil 20 mg did not prolong bleeding time, relative to aspirin alone. The maximum recommended dosing frequency is once per day in most patients. Your healthcare provider can help you determine the right dosage for you. Four strengths of almond-shaped tablets are available in different sizes and different shades of yellow: 2.Patients should not use CIALIS if sex is inadvisable due to cardiovascular status ().Use of CIALIS with alpha-blockers, antihypertensives or substantial amounts of alcohol (≥5 units) may lead to hypotension (, ).CIALIS is not recommended in combination with alpha-blockers for the treatment of BPH because efficacy of the . 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. headache. indigestion. back pain. muscle pain. flushing. stuffy nose. Patients who get back pain and muscle aches usually get them 12 to 24 hours after taking Cialis and these usually go away by.