In Response: The Cause of Fatal Respiratory Depression Is Combination of Clindamycin and Fentanyl, Rather than Tramadol.

1. Tramadol analgesic causes respiratory depression that is mainly mediated by opioid receptors. However, Tramadol is a weak opioid receptor agonist, and its metabolites O-desmethyltramadol is only about 1/10 of morphine, and fentanyl is a strong opioid receptor agonist, its potency is about 100 times morphine. When the two together, to be a major contributor to opioid receptors is fentanyl. Pradeep Bhatia was also held this view (1). 2. Tramadol poisoning is overdose. Under normal usage the key is patient’s renal impairment and CYP2D6 gene duplication (2). We present a case of renal function in patients with normal. Further, in terms of Genotyping of CYP2D6, East Asian and Africans do not exist uitrarapid metabolizers (3).The CYP2D6*10 allele is the most common allele in the Chinese population, and correlated with a significantly In Response: The Cause of Fatal Respiratory Depression Is Combination of Clindamycin and Fentanyl, Rather than Tramadol