Inclusion Criteria:  Patients aged 12-18. Patient scheduled for elective tonsillectomy +/- adenoidec-tomy, +/- BMTs. ASA physical status I and II.  Exclusion Criteria:  Severe upper respiratory tract infections. Patients who are actively on gabapentin or pregabalin, pre-existing with pain syndromes, chronic use of opioids, allergy to gabapentin, acetaminophen, and or NSAIDs Patient who lacks of fluency in English or inability to communicate pain. Patient who has severe asthma, bleeding disorders, and history of gastrointestinal bleeding, epilepsy, renal impairment or any other medical problem that in the opinion of the investigator would interfere with study population.