1. Potassium Cyanide / Cyanide
- Mechanism: Inhibits cytochrome c oxidase, blocking cellular respiration.
- Time to Kill: 1-15 minutes.
- Symptoms: Seizures, respiratory arrest, cardiac failure.
- Lethal Dose: ~200-300 mg.
- Antidote: Hydroxocobalamin, sodium thiosulfate, amyl nitrite.
- Autopsy Detection: Yes—blood may smell like almonds; cyanide levels detectable in blood.
2. Scopolamine (Devil’s Breath)
- Mechanism: Blocks acetylcholine receptors, causing amnesia and sedation.
- Time to Kill: 6-24 hours in high doses.
- Symptoms: Hallucinations, confusion, respiratory depression.
- Lethal Dose: >10 mg.
- Antidote: Physostigmine.
- Autopsy Detection: Yes—traceable in blood or urine for days.
3. Nickel Carbonyl
- Mechanism: Disrupts mitochondrial respiration, causing organ damage.
- Time to Kill: 24-72 hours.
- Symptoms: Chest pain, respiratory failure, organ dysfunction.
- Lethal Dose: 3-6 ppm inhaled over 30 minutes.
- Antidote: Chelation therapy (dimercaprol).
- Autopsy Detection: Yes—nickel detectable in blood and tissues.
4. Digoxin
- Mechanism: Inhibits Na+/K+ ATPase, leading to arrhythmias and cardiac arrest.
- Time to Kill: 1-3 hours.
- Symptoms: Nausea, vision changes, irregular heartbeat.
- Lethal Dose: ~5-10 mg.
- Antidote: Digoxin-specific antibodies (Digibind).
- Autopsy Detection: Yes—found in blood and heart tissues.
5. Tetraethyl Lead
- Mechanism: Disrupts neurotransmitter release, causing neurological damage.
- Time to Kill: Days to weeks.
- Symptoms: Confusion, tremors, seizures, coma.
- Lethal Dose: ~7 mg/kg.
- Antidote: Chelation therapy (EDTA).
- Autopsy Detection: Yes—lead levels detected in tissues.
6. Maitotoxin
- Mechanism: Opens calcium channels, causing cellular dysfunction.
- Time to Kill: Minutes to hours.
- Symptoms: Muscle spasms, cardiovascular collapse.
- Lethal Dose: Sub-nanogram quantities.
- Antidote: None.
- Autopsy Detection: Difficult—chemical analysis of blood may help.
7. Dimethylmercury
- Mechanism: Crosses the blood-brain barrier, causing irreversible neurological damage.
- Time to Kill: Days to months after exposure.
- Symptoms: Cognitive decline, tremors, coma.
- Lethal Dose: ~0.1 mL.
- Antidote: None; only supportive care.
- Autopsy Detection: Yes—mercury deposits in tissues.
8. Arsenic Poison
- Mechanism: Inhibits enzymes involved in metabolism, leading to organ failure.
- Time to Kill: Hours to days.
- Symptoms: Vomiting, diarrhea, dehydration, cardiac arrest.
- Lethal Dose: ~70-200 mg.
- Antidote: Dimercaprol, succimer.
- Autopsy Detection: Yes—detected in hair, nails, and tissues.
9. Aconitine Poison
- Mechanism: Keeps sodium channels open, causing continuous nerve firing.
- Time to Kill: 30 minutes to 2 hours.
- Symptoms: Numbness, vomiting, arrhythmias, respiratory failure.
- Lethal Dose: 2-5 mg.
- Antidote: No specific antidote; supportive care.
- Autopsy Detection: Yes—traceable in stomach contents.
10. Batrachotoxin
- Mechanism: Locks sodium channels open, preventing muscle relaxation.
- Time to Kill: Minutes to hours.
- Symptoms: Paralysis, cardiac arrest.
- Lethal Dose: ~2-3 micrograms.
- Antidote: None.
- Autopsy Detection: Yes—chemical residue analysis required.
11. VX Nerve Agent
- Mechanism: Inhibits acetylcholinesterase, leading to muscle spasms and respiratory failure.
- Time to Kill: Minutes to 1 hour.
- Symptoms: Paralysis, convulsions, respiratory arrest.
- Lethal Dose: ~10 mg via skin exposure.
- Antidote: Atropine, pralidoxime (2-PAM).
- Autopsy Detection: Yes—enzyme activity tests confirm exposure.
12. Sarin (Nerve Agent)
- Mechanism: Inhibits acetylcholinesterase, causing seizures and respiratory paralysis.
- Time to Kill: 1-10 minutes.
- Symptoms: Convulsions, paralysis, respiratory failure.
- Lethal Dose: 0.01 mg/kg.
- Antidote: Atropine, pralidoxime.
- Autopsy Detection: Yes—enzyme inhibition tests.
13. Tetrodotoxin
- Mechanism: Blocks sodium channels, leading to paralysis and respiratory failure.
- Time to Kill: 20 minutes to 6 hours.
- Symptoms: Numbness, paralysis, cardiac arrest.
- Lethal Dose: 1-2 mg.
- Antidote: Supportive care, including ventilation.
- Autopsy Detection: Yes—found in blood and tissues.
14. Polonium-210
- Mechanism: Emits alpha radiation, causing tissue and organ damage.
- Time to Kill: Days to weeks.
- Symptoms: Radiation sickness, organ failure.
- Lethal Dose: 1 microgram.
- Antidote: None.
- Autopsy Detection: Yes—radioactive signature detectable.
15. Ricin
- Mechanism: Inhibits ribosomal protein synthesis, leading to cell death.
- Time to Kill: 36-72 hours.
- Symptoms: Vomiting, organ failure, respiratory distress.
- Lethal Dose: ~1 mg if inhaled or injected.
- Antidote: None; only supportive care.
- Autopsy Detection: Yes—can be detected in tissues and stomach contents.
16. Botulinum Toxin
- Mechanism: Blocks acetylcholine release, causing muscle paralysis.
- Time to Kill: 12-72 hours.
- Symptoms: Paralysis, respiratory failure.
- Lethal Dose: ~1 ng/kg.
- Antidote: Antitoxin available.
- Autopsy Detection: Yes—traceable in blood.
17. Nembutal (Pentobarbital)
- Mechanism: Enhances GABA activity, leading to sedation and respiratory depression.
- Time to Kill: 1-3 hours.
- Symptoms: Coma, respiratory arrest.
- Lethal Dose: ~2-10 grams.
- Antidote: Supportive care.
- Autopsy Detection: Yes—detected in blood and tissues.
18. Ephedrine
- Mechanism: Stimulates adrenergic receptors, increasing heart rate and blood pressure.
- Time to Kill: Hours in overdose.
- Symptoms: Hypertension, arrhythmias, cardiac arrest.
- Lethal Dose: >150 mg.
- Antidote: Beta-blockers for cardiovascular symptoms.
- Autopsy Detection: Yes—detected in blood.
19. Sodium Seconal (Secobarbital)
- Mechanism: Depresses the central nervous system, causing respiratory failure.
- Time to Kill: 1-3 hours.
- Symptoms: Coma, death by respiratory arrest.
- Lethal Dose: ~2-4 grams.
- Antidote: Supportive care.
- Autopsy Detection: Yes—drug screen detects it in blood and tissues.
Abrin
- Mechanism: Inhibits protein synthesis by disabling ribosomes.
- Lethal Dose: ~0.1–1 microgram/kg.
- Symptoms: Nausea, vomiting, seizures, respiratory distress, and multi-organ failure.
- Time to Kill: 1-3 days.
- Antidote: None; supportive care only.
- Autopsy Detection: Yes—found in blood and tissues.
2. Amatoxins
- Mechanism: Inhibits RNA polymerase, preventing protein synthesis and leading to liver failure.
- Lethal Dose: ~0.1 mg/kg.
- Symptoms: Abdominal pain, vomiting, jaundice, liver and kidney failure.
- Time to Kill: 1-3 days.
- Antidote: No specific antidote; liver transplant may be required.
- Autopsy Detection: Yes—found in liver and kidneys.
3. Brodifacoum
- Mechanism: Inhibits vitamin K recycling, causing fatal internal bleeding.
- Lethal Dose: ~1 mg/kg.
- Symptoms: Bleeding from gums, nosebleeds, internal hemorrhage, and shock.
- Time to Kill: 3-10 days.
- Antidote: High doses of vitamin K1.
- Autopsy Detection: Yes—detectable in blood and liver.
4. Colchicine
- Mechanism: Disrupts microtubule formation, impairing cell division.
- Lethal Dose: ~10 mg.
- Symptoms: Gastrointestinal distress, multi-organ failure, and cardiovascular collapse.
- Time to Kill: 24-72 hours.
- Antidote: None; supportive care.
- Autopsy Detection: Yes—found in blood and organs.
5. Thallium
- Mechanism: Disrupts potassium channels, causing neurological and organ damage.
- Lethal Dose: ~10–15 mg/kg.
- Symptoms: Hair loss, nerve pain, tremors, organ failure.
- Time to Kill: 1-2 weeks.
- Antidote: Prussian blue.
- Autopsy Detection: Yes—detectable in hair, nails, and blood.
6. Strychnine
- Mechanism: Blocks glycine receptors, causing severe muscle contractions and convulsions.
- Lethal Dose: ~1–2 mg/kg.
- Symptoms: Muscle spasms, respiratory arrest, seizures.
- Time to Kill: 15-30 minutes.
- Antidote: Muscle relaxants and ventilatory support.
- Autopsy Detection: Yes—traces found in blood and tissues.
7. Phosgene
- Mechanism: Causes pulmonary edema by damaging lung tissues.
- Lethal Dose: ~500 ppm over 30 minutes.
- Symptoms: Coughing, chest pain, fluid buildup in lungs.
- Time to Kill: 24-48 hours.
- Antidote: None; oxygen therapy and supportive care.
- Autopsy Detection: Yes—fluid-filled lungs evident.
8. Chlorine Gas
- Mechanism: Reacts with moisture to form hydrochloric acid in airways, causing respiratory failure.
- Lethal Dose: ~400 ppm.
- Symptoms: Coughing, shortness of breath, chest pain.
- Time to Kill: Minutes to hours.
- Antidote: Oxygen therapy.
- Autopsy Detection: Yes—lung damage visible.
9. Hydrofluoric Acid
- Mechanism: Binds calcium, causing hypocalcemia and organ failure.
- Lethal Dose: ~50 mL of 10% solution.
- Symptoms: Severe pain, tissue necrosis, heart arrhythmias.
- Time to Kill: Hours to days.
- Antidote: Calcium gluconate.
- Autopsy Detection: Yes—tissue damage and electrolyte imbalance detected.
10. Paraquat
- Mechanism: Causes oxidative stress, damaging lungs and organs.
- Lethal Dose: ~10 mL of 20% solution.
- Symptoms: Nausea, lung fibrosis, multiple organ failure.
- Time to Kill: Days to weeks.
- Antidote: None; only supportive care.
- Autopsy Detection: Yes—paraquat residues found in tissues.
11. Fentanyl
- Mechanism: Opioid that suppresses the respiratory center.
- Lethal Dose: ~2 mg.
- Symptoms: Respiratory depression, pinpoint pupils, unconsciousness.
- Time to Kill: Minutes.
- Antidote: Naloxone.
- Autopsy Detection: Yes—detected in blood.
12. Carfentanil
- Mechanism: Ultra-potent opioid (100x stronger than fentanyl), causing rapid respiratory failure.
- Lethal Dose: ~0.02 mg.
- Symptoms: Instant respiratory arrest, unconsciousness.
- Time to Kill: Minutes.
- Antidote: Naloxone.
- Autopsy Detection: Yes—traceable in blood.
13. Aflatoxins
- Mechanism: Causes liver damage and cancer.
- Lethal Dose: ~10 mg/kg.
- Symptoms: Vomiting, liver failure, jaundice.
- Time to Kill: Days to weeks.
- Antidote: None; supportive care.
- Autopsy Detection: Yes—found in liver tissue.
14. Ergotamine
- Mechanism: Causes vasoconstriction and neurotoxic effects.
- Lethal Dose: ~1-2 mg/kg.
- Symptoms: Hallucinations, gangrene, seizures.
- Time to Kill: Days to weeks.
- Antidote: Vasodilators.
- Autopsy Detection: Yes—evidence in blood and tissues.
15. Alpha-Amanitin
- Mechanism: Inhibits RNA polymerase, leading to organ failure.
- Lethal Dose: ~0.1 mg/kg.
- Symptoms: Nausea, vomiting, liver failure.
- Time to Kill: 1-3 days.
- Antidote: None; liver transplant may help.
- Autopsy Detection: Yes—found in liver.
16. Ciguatoxin
- Mechanism: Activates sodium channels, causing nerve dysfunction.
- Lethal Dose: ~0.1 µg/kg.
- Symptoms: Vomiting, paralysis, cardiac issues.
- Time to Kill: Hours to days.
- Antidote: None; supportive care.
- Autopsy Detection: Difficult—traceable through blood.
17. Saxitoxin
- Mechanism: Blocks sodium channels, leading to paralysis.
- Lethal Dose: ~1 mg.
- Symptoms: Paralysis, respiratory failure.
- Time to Kill: Minutes to hours.
- Antidote: None.
- Autopsy Detection: Yes—traceable in tissues.
18. TCDD (Dioxin)
- Mechanism: Disrupts hormonal systems and causes cancer.
- Lethal Dose: ~10-100 µg/kg.
- Symptoms: Chloracne, organ damage.
- Time to Kill: Months to years.
- Antidote: None.
- Autopsy Detection: Yes—found in fat tissues.
19. Mercury Vapors
- Mechanism: Causes neurological damage by crossing the blood-brain barrier.
- Lethal Dose: Varies by exposure.
- Symptoms: Tremors, memory loss, coma.
- Time to Kill: Days to weeks.
- Antidote: Chelation therapy.
- Autopsy Detection: Yes—mercury detected in tissues.
20. Cadmium
- Mechanism: Damages kidneys and lungs, disrupting cellular processes.
- Lethal Dose: ~30 mg/kg.
- Symptoms: Pulmonary edema, renal failure.
- Time to Kill: Days to weeks.
- Antidote: None; chelation may help.
- Autopsy Detection: Yes—found in kidneys and lungs.