Does Pre and Postoperative Dextromethorphan Reduce Post-tonsillectomy Pain in Children?

Dextromethorphan is a drug of the morphinan class with sedative, dissociative, and stimulant properties (at higher doses). Dextromethorphan has been explored for a number other uses in medicine, including pain relief (as either the primary analgesic, or an opioid potentiator).

Placebo syrup identical to active comparator in taste, appearance and volume but is inactive. Placebo comparator will be used in the placebo arm of the trial.