Conclusion
Ondansetron, an anti-emetic with a relatively high safety profile, is prescribed globally for the symptom of vomiting. This was one of the first cases of KS characterized by non-ischaemic myocardial injury and elevated troponin due to an anaphylactoid reaction to ondansetron. KS have potential effects on biochemical parameters such as cardiac troponin along with an anaphylactoid phenomenon after an intravenous administration of the recommended dose. Thus, this case warrants more research for establishing the pathophysiology of KS, the association of cardiac troponin with anaphylactoid reactions, and ensure the judicial use of ondansetron.