By: Raymond Wu, Pharm.D. Candidate c/o 2013   The 5-hydroxytryptamine type 3 (5HT3) antagonists (e.g. ondansetron [Zofran®]) are commonly used in the prevention and treatment of nausea and vomiting in the inpatient setting.1  Overall, ondansetron is a well-tolerated medication with few side effects.1  Constipation, dizziness, and headache are the most commonly reported side effects associated…