Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. 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. Shipping: Discreet, fast shipping is a must. Cialis was also investigated in combination with finasteride, another BPH medication, in another trial. Tadalafil is approved by the FDA to treat erectile dysfunction.The lowest GoodRx price for the most common version of Tadalafil (Cialis) is around $, 96% off the average retail price of $ Read more about Tadalafil (Cialis) See more about Benign Prostatic Hyperplasia. Side Effects. Headache, stomach upset, back pain, muscle pain, stuffy nose, flushing, or dizziness may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To.  · But on average, its effects start to lessen 2 to 3 hours after you take a dose. The typical dose for once-daily Cialis for ED is milligrams (mg) to 5 mg. When used as needed for ED, the usual.