Glad I found this information. I was just informed by my surgeon that he wants me to do pastime but he stated four weeks. After reading the posts I am really worried. I am an adult with ADHD that has had 19 left knee surgeries along with two hip surgeries to repair tears in muscles along with both feet having had yep, extra ankle bone. What a mess. I have been on pain meds most of my life. I don't have the effects that most have because of the ADHD. No drowsiness I function just fine. They treat ADHD with narcotics. My problem is I am now scared that if this lets say zapping is going to effect me in ways others weren't. I am going to continue to read the posts before I go on, but if any one has ADHD and is or has had the pstim please let me know your effects. Ty