Postmortem Toxicology: Redistribution, Tolerance and Cause-of-Death (UGC-NET Unit IV)
Published:
Questions
30
Duration
30 min
Faculty-reviewed
0
Updated
17 May 2026
About this mock
Advanced UGC-NET Forensic Science Unit IV drill on postmortem toxicology with a sharp focus on the three interpretation pillars that decide whether a measured drug level can be called the cause of death. Postmortem redistribution (PMR) coverage spans the volume-of-distribution (Vd) and tissue-to-blood ratio mechanism, the central-to-peripheral concentration gradient that builds after death, the PMR coefficient (ratio of postmortem to antemortem concentration), and the practical preference for femoral vein blood over cardiac blood in toxicology sampling. Specific PMR profiles for amitriptyline and other tricyclic antidepressants, digoxin, fentanyl, methadone, cocaine and other lipophilic basic drugs are covered with reference to Pounder and Jones (1990, Forensic Science International) and Skopp review series. Tolerance coverage spans pharmacokinetic induction, receptor down-regulation, the gulf between opioid-naive and chronic-user fatal thresholds (Singapore methadone maintenance studies, fentanyl thresholds), and the therapeutic-toxic-lethal reference range concept. Cause-of-death interpretation covers polypharmacy synergy (opioid plus benzodiazepine respiratory depression, TCA QT prolongation), positional asphyxia with drug-on-board, drug-disease interaction (cocaine plus cardiomyopathy), autopsy findings (pulmonary oedema, foam cone, needle marks), histology, vitreous-humour ethanol confirmation, artefactual ethanol from microbial neoformation, embalming and decomposition challenges, and the joint pathologist plus toxicologist interpretation model. Indian context covers NFSU and AIIMS forensic-toxicology research and the Indian forensic medicine textbook tradition.
Sources & references
Questions in this mock are written and verified against the following sources. Citations are recorded per question and shown in the explanation after submission.
- cited in 3 questions
Pounder DJ and Jones GR, Post-mortem drug redistribution: a toxicological nightmare
Forensic Science International, Volume 45, Issue 3, pages 253 to 263, 1990, digoxin C/P example
Open source - cited in 2 questions
Reddy KSN and Murty OP, The Essentials of Forensic Medicine and Toxicology
Jaypee Brothers, 34th Edition, 2017, Chapter on cause-of-death determination in drug deaths
Open source - cited in 2 questions
Skopp G, Postmortem toxicology
Forensic Science Medicine and Pathology, Volume 6, Issue 4, pages 314 to 325, 2010, preanalytic and matrix review
Open source - cited in 2 questions
Drummer OH and Odell M, The Forensic Pharmacology of Drugs of Abuse
Arnold Publishers, 2001, Chapter on pharmacokinetics and postmortem toxicology, Vd and PMR
Open source - cited in 1 question
O'Neal CL and Poklis A, Postmortem production of ethanol and factors that influence interpretation: a critical review
American Journal of Forensic Medicine and Pathology, Volume 17, Issue 1, pages 8 to 20, 1996, neoformed ethanol review
Open source - cited in 1 question
Body R, Bartram T, Azam F, Mackway-Jones K, Guidelines in Emergency Medicine Network (GEMNet): guideline for the management of tricyclic antidepressant overdose
Emergency Medicine Journal, Volume 28, Issue 4, pages 347 to 368, 2011, TCA cardiotoxicity mechanism
Open source - cited in 1 question
Wolff K, Characterization of methadone overdose: clinical considerations and the scientific evidence
Therapeutic Drug Monitoring, Volume 24, Issue 4, pages 457 to 470, 2002, methadone tolerance and thresholds
Open source - cited in 1 question
Dalpe-Scott M, Degouffe M, Garbutt D, Drost M, A comparison of drug concentrations in postmortem cardiac and peripheral blood in 320 cases
Canadian Society of Forensic Science Journal, Volume 28, Issue 2, pages 113 to 121, 1995, C/P ratio dataset
Open source - cited in 1 question
Byard RW, Postural or positional asphyxia in adults
Forensic Pathology Reviews, Volume 6, pages 21 to 36, 2012, positional asphyxia with drug-on-board
Open source - cited in 1 question
Hargrove VM, Effects of embalming on autopsy chemistry: a review
Journal of Forensic Sciences, Volume 36, Issue 2, pages 392 to 401, 1991, embalming and drug detection
Open source - cited in 1 question
Park TW, Saitz R, Ganoczy D, Ilgen MA, Bohnert AS, Benzodiazepine prescribing patterns and deaths from drug overdose among US veterans receiving opioid analgesics
BMJ, Volume 350, page h2698, 2015, opioid plus benzodiazepine fatal-overdose risk
Open source - cited in 1 question
Anderson DT and Muto JJ, Duragesic transdermal patch: postmortem tissue distribution of fentanyl in 25 cases
Journal of Analytical Toxicology, Volume 24, pages 627 to 634, 2000, fentanyl PMR and threshold data
Open source - cited in 1 question
Karch SB, Karch's Pathology of Drug Abuse
CRC Press, 5th Edition, 2015, Chapter on cocaine cardiac pathology and drug-disease interaction
Open source - cited in 1 question
Skopp G and Potsch L, Cocaine and metabolites in fluids and tissues: stability and postmortem considerations
International Journal of Legal Medicine, Volume 118, pages 11 to 17, 2004, cocaine stability and preservation
Open source - cited in 1 question
Druid H and Holmgren P, A compilation of fatal and control concentrations of drugs in postmortem femoral blood
Journal of Forensic Sciences, Volume 42, Issue 1, pages 79 to 87, 1997, polypharmacy reference framework
Open source - cited in 1 question
Saukko P and Knight B, Knight's Forensic Pathology
CRC Press, 4th Edition, 2016, Chapter on deaths from narcotic and other drugs, pulmonary oedema
Open source - cited in 1 question
Skopp G, Preanalytic aspects in postmortem toxicology
Forensic Science International, Volume 142, Issues 2 to 3, pages 75 to 100, 2004, sampling and stability review
Open source - cited in 1 question
Williams JT, Ingram SL, Henderson G, Chavkin C, von Zastrow M, Schulz S, Koch T, Evans CJ, Christie MJ, Regulation of mu-opioid receptors: desensitization, phosphorylation, internalization, and tolerance
Pharmacological Reviews, Volume 65, Issue 1, pages 223 to 254, 2013, opioid tolerance mechanisms
Open source - cited in 1 question
Kugelberg FC and Jones AW, Interpreting results of ethanol analysis in postmortem specimens: a review of the literature
Forensic Science International, Volume 165, Issues 1 to 2, pages 10 to 29, 2007, vitreous-to-blood ethanol
Open source - cited in 1 question
Baselt RC, Disposition of Toxic Drugs and Chemicals in Man
Biomedical Publications, 12th Edition, 2020, reference ranges and case-data compilations
Open source - cited in 1 question
Hilberg T, Bugge A, Beylich K M, Morland J, Bjorneboe A, Diffusion as a mechanism of postmortem drug redistribution: an experimental study in rats
International Journal of Legal Medicine, Volume 105, Issue 2, pages 87 to 91, 1992, amitriptyline PMR data
Open source - cited in 1 question
Modi JP, Modi's Medical Jurisprudence and Toxicology
LexisNexis, 26th Edition, 2018, Section on drug deaths and scene investigation in Indian practice
Open source - cited in 1 question
Drummer OH, Postmortem toxicology of drugs of abuse
Forensic Science International, Volume 142, Issues 2 to 3, pages 101 to 113, 2004, interpretation framework
Open source - cited in 1 question
Aggarwal P, Wali JP, Aluminium phosphide poisoning and other Indian forensic toxicology contributions
Journal of the Association of Physicians of India and AIIMS Forensic Medicine departmental publications, Indian forensic toxicology research
Open source - cited in 1 question
Drummer OH and Gerostamoulos J, Postmortem drug analysis: analytical and toxicological aspects
Therapeutic Drug Monitoring, Volume 24, Issue 2, pages 199 to 209, 2002, integrative interpretation framework
Open source
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Questions are written and edited by the ForensicSpot team and cited from peer-reviewed forensic textbooks, official syllabi and primary case law. Each one is verified before publishing. Detailed explanations show after you submit, so the test stays a real test. See a mistake? Tell us.
Common questions
What does the Postmortem Toxicology: Redistribution, Tolerance and Cause-of-Death (UGC-NET Unit IV) mock cover?+
Advanced UGC-NET Forensic Science Unit IV drill on postmortem toxicology with a sharp focus on the three interpretation pillars that decide whether a measured drug level can be called the cause of death. Postmortem redistribution (PMR) coverage spans the volume-of-distribution (Vd) and tissue-to-blood ratio mechanism, the central-to-peripheral concentration gradient that builds after death, the PMR coefficient (ratio of postmortem to antemortem concentration), and the practical preference for fe
How many questions and how long is the test?+
30 multiple-choice questions, 30 minutes total. Difficulty: hard. Tier: Premium.
Who is this mock for?+
Forensic science students and aspirants who want timed, exam-style practice with explanations and verified source citations on NET. Useful for postgraduate entrance preparation and for BSc / MSc forensic students testing their recall under time.
Are the questions reviewed?+
Each question carries a verified source citation. Faculty review for individual questions is in progress.
Do I need an account to take this mock?+
Yes, a free ForensicSpot account is required to start a timed attempt — this lets you save progress, see per-question explanations after submission, and track your topic-level performance over time.