‘First Aid Manual’ (Revised 11th edition), written and authorised by St John Ambulance, British Red Cross and St. Andrew’s First Aid, published by Dorling Kindersley 2021

Pages 200-204 How Poisons Affect the Body, Types of Poison, Swallowed Poisons, Drug Poisoning, Alcohol Poisoning

Your setting may have a copy or you may like to look for it at your local library