Continue to take tadalafil even if you feel well. Shipping: Discreet, fast shipping is a must. Erectile dysfunction can be caused by a variety of factors , including age, cardiovascular problems, diabetes, and other conditions that affect nerve function or blood flow. It may be taken with or without food. Some platforms have a digital pharmacy that ships the medication to your home, while others send an electronic prescription to your local pharmacy. In , Pfizer scientists discovered that sildenafil, which also inhibits the PDE5 enzyme, caused penile erection in males participating in a clinical study of a heart medicine. Psychological factors like stress, depression, or anxiety can also contribute.Tadalafil is the generic name for the brand-name drug Cialis. At the time of publishing, the average cash price of 30, milligram (mg) Cialis tablets is approximately $2,, whereas. 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. 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.