Meperidine-induced reversible retrograde amnesia

Area of Science:

• Pharmacology
• Neuroscience
• Clinical Medicine

Background:

• Meperidine is a synthetic opioid analgesic commonly used for acute pain.
• Its active metabolite, normeperidine, is neurotoxic and can cause central nervous system (CNS) adverse events.
• Understanding the full spectrum of meperidine's side effects is crucial for patient safety.

Purpose of the Study:

• To report a case of reversible amnesia associated with a single therapeutic dose of meperidine.
• To investigate potential adverse neurological effects of meperidine administration.
• To contribute to the understanding of opioid-induced neurotoxicity.

Main Methods:

• A case report of a 29-year-old female patient presenting with low back pain.
• Administration of intravenous meperidine 80 mg for analgesia.
• Detailed clinical observation, physical examination, laboratory tests, and noncontrast computed tomography (CT).
• Monitoring of patient's neurological status before and after medication administration.

Main Results:

• The patient achieved analgesia but subsequently developed retrograde amnesia, disorientation, slowed speech, and perceptual changes.
• Neurological examination, laboratory results, and CT scan were unremarkable.
• Symptoms resolved spontaneously within three hours after discontinuing meperidine.

Conclusions:

• Meperidine administration was likely associated with reversible amnesia in this patient.
• This case suggests that even a single therapeutic dose of meperidine can potentially cause significant, albeit temporary, CNS adverse effects.
• Further research may be warranted to elucidate the mechanisms of opioid-induced neurotoxicity.