 WBI is specifically contraindicated in the presence of ileus, significant gastrointestinal hemorrhage, hemodynamic instability, uncontrollable intractable vomiting, bowel obstruction, bowel perforation, and in patients with a decreased level of consciousness with a compromised unprotected airway.Minor complications include nausea, vomiting, abdominal cramps, and bloating.Patients with altered mental status or a compromised and unprotected airway are at risk for pulmonary aspiration.