Dosing interval
Healthy adults: usual dose is 325–1000 mg every 4–6 hours as needed. Do not take more often than every 4 hours.
Medication information
OTC
Acetaminophen
Common pain and fever relief — also called Tylenol
Acetaminophen (Tylenol) treats pain and fever. It is one of the most widely used medications in Canada and is available in tablets, suspensions for children, and suppositories. Used carefully it is well tolerated; the main risk is liver injury from too much in 24 hours.
How the pharmacy helps
We stock 325 mg and 500 mg tablets, paediatric suspensions, and suppositories. The pharmacist can help you check whether other products you are taking already contain acetaminophen, and can suggest a dose for children based on weight. Always bring questions to the counter rather than guessing.
Access framing
Available without a prescription. Ask us to add it to a pickup, or talk to the pharmacist about appropriate dosing for your situation.
Medication safety
Safety notes for this page
Follow the medication label, prescription directions, and pharmacist counselling. Ask the pharmacy if the directions on your bottle do not match what you expected.
Maximum daily amount
Healthy adults: do not exceed 4 grams (4,000 mg) in 24 hours from all sources combined — including cold/flu, sleep, and pain combination products. Many people benefit from staying at or below 3 grams per day if they take it daily for chronic pain. Lower limits apply for the situations listed below.
Urgent warning
Acetaminophen overdose can cause severe, sometimes fatal, liver injury — even when symptoms in the first 24 hours are mild. If you or someone else has taken more than the maximum daily dose, contact the Manitoba Poison Centre at 1-855-776-4766 (toll-free, 24/7) or 911 right away. Do not wait for symptoms.
Ask a pharmacist before use
Talk to a pharmacist or your prescriber before regular use if any of the following apply: • Liver disease or a history of liver problems. • Three or more alcoholic drinks per day on most days. • Long-term warfarin (Coumadin) use — daily acetaminophen can raise INR. • Older adults, low body weight, or under-nourishment — a lower daily maximum may be safer. • Pregnancy or breastfeeding — see the note below. • Any other prescription medication that affects the liver.
Interactions and duplicate ingredients
Many over-the-counter cold, flu, sinus, sleep, and combination pain products already contain acetaminophen. Always read the active-ingredient label before taking a second product. Long-term daily doses near the maximum can raise INR in people on warfarin and may need closer monitoring. The pharmacist will check your full medication list at each fill.
Pregnancy and breastfeeding
Acetaminophen at usual doses is generally considered the preferred over-the-counter pain or fever option in pregnancy and breastfeeding when something is needed. Use the lowest effective dose for the shortest time. Talk to your prescriber or a pharmacist about your situation before regular use.
Access
Available without a prescription. Ask us to add it to a pickup, or talk to the pharmacist about appropriate dosing for your situation.
Storage
Store at room temperature, away from moisture. Keep out of reach of children — paediatric suspensions are flavoured and can look like a treat.
Forms and strengths
Medication entries grouped here
Strengths, dosage forms, brands, or package entries may vary. Your prescription label and pharmacist counselling are the instructions to follow.
| Brand / Generic | Strength | Form | DIN | Record |
|---|---|---|---|---|
Tylenol Acetaminophen | 500mg | Tablet | Active |
For healthy adults, do not exceed 4 grams (4,000 mg) in 24 hours from all sources. Many cold/flu and combination products contain acetaminophen — count those toward the total. Talk to a pharmacist before daily use of more than 3 g.
Children are dosed by weight, and the right amount depends on the strength of the product (drops, suspension, chewables). Bring the bottle and your child's weight to the counter — the pharmacist will work out the dose. Do not estimate.
No. Tylenol is acetaminophen; Advil is ibuprofen. They work differently and can sometimes be alternated when one alone is not enough — ask the pharmacist about a schedule.
Onset is usually within 30–60 minutes for tablets and faster for liquids.
Call the Manitoba Poison Centre at 1-855-776-4766 (toll-free, 24/7) or 911 right away. Acetaminophen overdose can damage the liver even when early symptoms are mild. Do not wait to feel sick.
Have questions about this medication?
Call the pharmacy or bring the medication to the counter. We can help compare labels, dosing schedules, storage needs, and questions to ask your prescriber.
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