Timeline - Poisons
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Slide the time bar to see key dates relating to early discoveries about poisons and toxins. Pause the mouse pointer over any of the boxes to see additional information about each event. Find out more by browsing or searching the Science Learning Hub.
Homer writes of the use of arrows poisoned with venom (ancient Greek – toxikon) in the epic tales The Odyssey and The Iliad.
The philosopher Socrates, charged with religious heresy and corrupting the morals of local youth, dies by hemlock poisoning (the active chemical is the alkaloid coniine).
Egyptian queen Cleopatra experiments with strychnine and other poisons on prisoners and the poor. She commits suicide by the bite of the Egyptian asp.
A treatise on poisons
Jewish philosopher and physician Moses Maimonides writes Treatise on Poisons and Their Antidotes.
The Black Death
The bubonic and pneumonic plagues (also known as the Black Death) ravage Europe, killing about 25 million people between 1347–1351. This is the largest pandemic in recorded history. Worldwide, it kills about 75 million people.
A council of murderers
The Venetian Council of Ten, a political body, carries out murders with poison for a fee.
Toxicity depends on dose
Paracelsus (1493–1541) identifies the specific chemical components of plants and animals that are responsible for their toxic properties. He also shows that varying the amount of the poison affects the severity of the effects.
Leonardo da Vinci (1452–1519) experiments with bioaccumulation of poisons in animals and calls the procedure “passages”.
Pope Clement VII (1478–1534) dies (possibly murdered) after eating Amanita phalloides, the death cap mushroom.
Shakespeare reference to poisoning
William Shakespeare (1564–1616) makes a reference to poisoning in his play Romeo and Juliet in Act 5: “Here’s to my love! O true apothecary! Thy drugs are quick. Thus with a kiss I die.”
Hieronyma Spara, a Roman woman and fortune-teller, forms a secret organisation that sells an arsenic potion to women so they can murder their husbands.
Decree to stop poisonings
King Louis XIV passes a royal decree forbidding apothecaries from selling arsenic or poisonous substances.
An account of poisons
Richard Meade (1673–1754) writes A Mechanical Account of Poisons, about poisonous animals and plants.
Father of toxicology
Considered the father of modern toxicology, Orfila (1787–1853) establishes a systematic correlation between chemical properties and biological effects of poisons. He writes Traite des Poisons, which describes the symptoms of poisons.
Microchemistry of poisons
Theodore Wormley (1826–1897) writes the first American book dedicated to poisons, Microchemistry of Poisons.
US food and drugs law passed
The Pure Food and Drugs Act (1906) prevents the production or trafficking of mislabelled, adulterated or poisonous foods, drugs and pharmaceuticals, medicines and liquors.
US Food and Drug Administration
The US Food and Drug Administration (FDA) agency is established to regulate the content and safety of consumer drugs and food.
Minamata Bay in Japan is contaminated with mercury by a chemical plant. Thousands of adults and children are poisoned from eating fish contaminated with methyl mercury.
London Great Smog
The London Great Smog (also known as the Big Smoke) occurs for 5 days, causing or progressing the death of about 12 000 people. It is a stimulus to the modern environmental movement.
Arnold J Lehman
Arnold J Lehman collaborates with scientists to produce the first large compilation of toxicology, Procedures for the Appraisal of the Toxicity of Chemicals in Foods. He is co-founder of the Society of Toxicology and its journal Toxicology and Applied Pharmacology.
International Union of Toxicology
The International Union of Toxicology is founded in Brussels, Belgium.
HABs in NZ
Many harmful algal blooms (HABs) are reported in New Zealand along with the discovery that these are really toxic.
Shellfish bans in NZ
Shellfish banning begins due to appearance of poisonous shellfish.
Dogs’ deaths due to TTX
The death of dogs on Auckland beaches leads to the discovery of deadly tetrodotoxin in grey side-gilled sea slugs (eaten or mouthed by the dogs).
LC-MS methods detect shellfish toxicity
Legislation is passed that all countries in the European Union use liquid chromatography-mass spectrometry methods (rather than mouse bioassays) to detect known toxins and measure toxicity levels in shellfish. The Cawthron Institute in Nelson developed these methods.
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