A randomized double-blinded placebo controlled study of four interventions for the prevention of postoperative nausea and vomiting in maxillofacial trauma surgery.

Purpose: This study aimed to determine if preoperative oral administration of metoclopramide, chlorpromazine, gabapentin, or dexamethasone would effectively reduce postoperative nausea and vomiting (PONV) in the first 24 hours after surgery in patients undergoing maxillofacial trauma surgery.

Methods: One hundred fifty patients with maxillofacial skeletal trauma that need open reduction and internal fixation were randomly assigned to receive one of the following drugs orally, 1 hour preoperative: 10 mg metoclopramide (group A), 300 mg gabapentin (group B), 100 mg chlorpromazine (group C), 5 mg dexamethasone (group D), and placebo (group E). All patients were observed in the first 24 hours for PONV.