The Dr. prescribed a 2 day supply of codeine/tylenol (12 pills) 3 times over 3 weeks and they helped with the nerve pain. I took it sparingly and my last 1/2 pill last Sunday. Monday, I felt terrible, no energy at all, I could barely drag myself around the house. Tuesday I felt a little better and Wednesday I felt more normal. I think I may have been going through withdrawal from the opiate. If so, that is really addictive stuff.