What is the usual adult paracetamol dose, and how can overdose be avoided?
For a suitable adult, a common dose is 500–1,000 mg at least four hours apart, with no more than four doses and 4,000 mg in 24 hours unless the label sets a lower limit. Weight, liver health and other factors may require less.
Details
Count every product
Paracetamol, also called acetaminophen, may be present in cold remedies and combination pain medicines. Add up the amount from all packets. Do not combine products containing it without advice, and check liquid concentration rather than using a household spoon.
Who needs different instructions?
Ask a clinician or pharmacist if you weigh under 50 kg, have liver or kidney disease, or regularly drink alcohol. Children require separate age-, weight- and product-specific instructions; do not improvise by dividing an adult dose.
If too much was taken
Obtain medical or poison-centre advice immediately even if you feel well, because liver injury symptoms may be delayed. Do not wait for a particular numerical threshold or for symptoms before seeking help. Bring the packaging and a record of amounts and times taken. Early assessment is important.
Related reading: Should I start daily aspirin for prevention after age 50?.