Steven Dain MD, FRCPC
of adverse effect or sometimes a limited idiosyncratic reaction or basically an unexpected reaction. Some children for example when given a sedative instead of getting tired, speed up. These reactions are typically rare and time limited, and should disappear as the anesthesia or medication is metabolized and eliminated from the body.
If the symptoms continue, it would be wise to have your son examined by his pediatrician and or internist and consult with the anesthesiologist to determine what, if any, of the medications used may have contributed to this.