This is the protocol for a review and there is no abstract.The objectives are as follows:To assess the effectiveness of analgesics for management of post-operative pain in children who have undergone a tonsillectomy or adenoidectomy, or both.The questions to be addressed are:1. What analgesics (or combination of analgesics) are effective for the treatment of post-operative pain in children who have undergone a tonsillectomy or adenoidectomy, or both? 2. What adverse effects, if any, are associated with the use of individual or combined analgesics for treatment of post-operative pain in children who have undergone a tonsillectomy or adenoidectomy, or both?