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A fatal drug interaction between oxycodone and clonazepam.
David L Burrows1, Andrea N Hagardorn, Gretel C Harlan
1Section of Toxicology, Department of Pharmacology, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA. toxdoc2b@yahoo.com
Journal of Forensic Sciences
|May 24, 2003
Summary
A fatal drug interaction occurred between oxycodone (Oxycontin) and clonazepam (Klonapin), leading to central nervous system and respiratory depression. This case highlights the potential dangers of combining these commonly prescribed medications.
Area of Science:
- Forensic Toxicology
- Clinical Pharmacology
Background:
- Oxycodone (Oxycontin) is an widely prescribed opioid analgesic, and its use has surged dramatically.
- Clonazepam (Klonapin) is a benzodiazepine used for seizure and panic disorder treatment.
- The combination of oxycodone and clonazepam presents a significant risk due to potential synergistic central nervous system depressant effects.
Observation:
- A case study involved a 38-year-old female found deceased with evidence of drug abuse and hepatitis B and C.
- Toxicological analysis of biological samples revealed the presence of oxycodone, clonazepam, trazodone, and cannabinoids.
- Post-mortem examination showed pathologies consistent with severe CNS and respiratory depression, including collapsed lungs and heart failure.
Findings:
- Quantitative analysis detected 1.41 microg/mL of clonazepam and 0.60 microg/mL of oxycodone in the deceased's plasma.
- The combined presence and concentrations of these substances were sufficient to cause fatal central nervous system and respiratory depression.
- Synergistic pharmacodynamic or metabolic interactions between oxycodone and clonazepam are postulated as the cause of death.
Implications:
- This case underscores the critical need for careful monitoring when prescribing potent central nervous system depressants like oxycodone and clonazepam concurrently.
- Healthcare providers should be aware of the potential for lethal drug interactions, even with prescribed medications.
- Further research into the pharmacokinetic and pharmacodynamic interactions of oxycodone and clonazepam is warranted to inform clinical practice and patient safety guidelines.