Lidocaine is widely available and is a very commonly used local anesthetic. When administered intravenously, lidocaine infusions have anti-inflammatory effects and have significantly decreased the reliance on opioid use for adequate pain management in adult abdominal and spine surgeries. A major advantage of lidocaine infusion is that it is not associated with a significant side effect profile.The role of lidocaine in pediatric acute perioperative pain remains limited.

The aim of the study is to determine if using lidocaine continuously during anesthesia care will decrease post-operative pain for children having their tonsils and adenoids removed.

Inclusion Criteria:

- scheduled tonsillectomy and adenoidectomy with or without myringotomy/PE tubes at Hasbro Children's Hospital

Exclusion Criteria:

• history of allergies to local anesthetics
• physical or developmental delays
• psychiatric illness
• current use of sedative or anticonvulsive medications
• use of premedication (oral/nasal)
• pre-existing cardiovascular, renal, or hepatic disease
• pre-existing cerebral or neuromuscular disease
• patient with personal or family history of malignant hyperthermia
• recent history of upper respiratory infection within last 7 days
• regular use of analgesic medications

Anesthesia care providers will be acquiring the study solution from the institution's pharmacy (lidocaine or saline) to administer perioperatively. The pharmacy will prepare the study solutions per randomization and label the solution as the study solution without reference to lidocaine or saline. Per protocol, the care providers will then administer the study solution as a weight based infusion.