A case report described rapid relief of extreme neck and back extension after midazolam. The observation involved one suspected adverse reaction.
The sequence
A young man with schizophrenia received intramuscular ketamine for severe prehospital agitation. Marked neck and back extension developed shortly afterward.
The abnormal posture resolved rapidly after midazolam, and the authors did not identify another explanation in the reported evaluation. They interpreted the event as ketamine-associated opisthotonos.
Two questions remain distinct
A temporal adverse-event attribution and a treatment response each have limits in one uncontrolled case. The report cannot establish incidence, mechanism, or the response probability under another exposure.
It also cannot show that every rigid or posturing patient has the same condition or that midazolam reverses all ketamine complications. Forensic interpretation should preserve the initial agitation, medication timing, exact movement, examination, and response. Symptom resolution is evidence of the clinical course, not a validated diagnostic or general antidote rule.
Source paper
Original analysis of the supplied journal article, identified as PMC8610457.
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