Contaminated Dextromethorphan active pharmaceutical ingredient. Information Exchange System. Drug Alert No. 129. October 17, 2013. See in PDF Format.Background:On 24 January 2013 WHO Drug Alert number 126 was published following the discovery in Pakistan of two types of locally produced cough syrups containing the contaminated active pharmaceutical ingredient (API) Dextromethorphan. This led to the death of […]