Do not drink grapefruit juice if you’re taking tadalafil for pulmonary hypertension. Check the healthdirect’s medicines section for more information about tadalafil. Cialis is also highly effective in reducing the symptoms of BPH. A small number of patients taking Cialis also reported abnormal vision. For erectile dysfunction, some basic questions to ask your doctor include: What’s the most likely cause of my erection problems?MNT ‘s review. Lemonaid sells Cialis in these forms: Cialis: available in doses of 5, 10, and 20 mg, starting at $65 per tablet. Daily Cialis: 5 mg tablet with pricing starting from $50 per tablet. CIALIS for Use as Needed. Creatinine clearance 30 to 50 mL/min: A starting dose of 5 mg not more than once per day is recommended, and the maximum dose is 10 mg not more than once in every 48 hours. Creatinine clearance less than 30 mL/min or on hemodialysis: The maximum dose is 5 mg not more than once in every 72 hours [see . Tadalafil (Adcirca, Cialis) Vardenafil (Levitra, Staxyn) Avanafil (Stendra) .