Do you have Erectile Dysfunction? canadian viagra for sale Precautions Common side effects of selective enzyme inhibitors include headache, reddening of the face and neck (flushing), indigestion, and nasal congestion. Cialis® may cause muscle aches and back pain, which usually resolve on their own within 48 hours. Vascular surgery for erectile dysfunction is rarely performed and is generally considered experimental. Risks include nerve damage and the creation of scar tissue, both of which are causes of impotence. Surgeons experienced with these procedures may be difficult to find. On the part of the consumer, such advertisements "can engender useful conversations between doctors and patients," Metzl said. "And they can encourage doctors to look at cultural issues."
