Published by Dr. Patricia Washington, MD, MPH | Health | Last update: Aug 30 • 2265
9 min
Acetaminophen and ibuprofen are two of the most common over-the-counter (OTC) pain relief medications, but they work differently in the body and are suited for different types of pain and conditions. Knowing the difference between these two drugs can help you choose the best option for your symptoms and health needs.
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Contents
What Is Acetaminophen?
Acetaminophen, also known as paracetamol in some countries, is a non-opioid analgesic commonly used to relieve pain and reduce fever. In the U.S., it’s often referred to as acetaminophen, while its chemical name is N-acetyl-para-aminophenol (APAP).
Uses of Acetaminophen
Acetaminophen is recommended for mild-to-moderate pain relief and fever reduction. It is often used to treat:
- Backaches
- Colds
- Headaches
- Menstrual cramps
- Minor arthritis pain
- Muscle aches
- Sore throat
- Toothaches
- Pain from vaccine reactions
It is also a common choice for treating fevers in both adults and children.
How Acetaminophen Works
Although the exact mechanism in humans isn’t fully understood, researchers believe acetaminophen blocks part of the cyclooxygenase (COX) pathway in the brain and spinal cord. By doing this, it prevents the production of prostaglandins—molecules that signal pain and inflammation when tissue is damaged or infected.
Dosage Recommendations
Always follow the dosage instructions on the label or as prescribed by your doctor. For adults and teenagers over 13 years old weighing more than 110 pounds, the typical dose is:
- 1,000 milligrams every 6 hours or 650 milligrams every 4 hours, without exceeding 4,000 milligrams per day.
For those weighing less than 110 pounds, the dosage is based on body weight. Taking more than the recommended amount can cause severe liver damage.
Common Acetaminophen Brand Names
Acetaminophen is found in many OTC and prescription medications. Popular brands include:
- Tylenol
- Dayquil and Nyquil
- Feverall
- Robitussin
- Vicodin (in combination with other drugs)
What Is Ibuprofen?
Ibuprofen is a widely used nonsteroidal anti-inflammatory drug (NSAID). Like acetaminophen, it reduces pain and fever, but it also addresses inflammation—making it a better choice for conditions involving swelling or redness.
Uses of Ibuprofen
Ibuprofen is FDA-approved for mild-to-moderate pain relief, fever reduction, and inflammation. It’s commonly used to treat:
- Arthritis (both osteoarthritis and rheumatoid arthritis)
- Backaches
- Colds
- Fevers
- Headaches
- Menstrual pain
- Pain with inflammation, such as sprains or injuries
How Ibuprofen Works
Ibuprofen works by blocking the COX pathway throughout the body, reducing the production of prostaglandins. Unlike acetaminophen, which primarily acts in the brain and central nervous system, ibuprofen works both in the brain and throughout the rest of the body. This is why it’s particularly effective at reducing inflammation.
Dosage Recommendations
The appropriate dosage of ibuprofen varies depending on the brand and formulation. Always follow the instructions on the label or consult your doctor. It’s best to take the lowest effective dose to minimize the risk of side effects.
Common Ibuprofen Brand Names
Popular ibuprofen products include:
- Advil
- Motrin
Side Effects of Acetaminophen vs. Ibuprofen
Acetaminophen Side Effects
Acetaminophen is generally well-tolerated but can cause rare allergic reactions, including:
- Swelling of the face, tongue, or throat
- Hives
- Difficulty breathing
In very rare cases, it can cause severe skin reactions such as redness, blistering, or peeling. If this occurs, stop taking the medication and seek medical attention immediately.
Acetaminophen can also cause liver damage if taken in excessive doses or combined with alcohol. It’s crucial to avoid taking multiple medications that contain acetaminophen to prevent accidental overdose.
Common side effects include:
- Nausea
- Vomiting
- Headache
Ibuprofen Side Effects
As an NSAID, ibuprofen carries a higher risk of certain side effects, particularly with long-term use. These include:
- Increased risk of heart attack or stroke
- Stomach ulcers or bleeding
- Kidney damage
People with conditions like heart disease, asthma, or ulcers should consult their doctor before using ibuprofen. It should also be avoided in the later stages of pregnancy, as it may cause complications for the baby or mother.
Common side effects include:
- Headache
- Nausea
- Upset stomach
- Loss of appetite
Serious side effects that require immediate medical attention include:
- Signs of liver or kidney damage (e.g., yellowing of the skin or reduced urination)
- Symptoms of a heart attack or stroke (e.g., chest pain, shortness of breath, or sudden weakness)
- Bloody stools or vomiting that looks like coffee grounds (indicating stomach bleeding)
When to Use Acetaminophen vs. Ibuprofen
Knowing when to use acetaminophen versus ibuprofen depends on your symptoms:
- For Headaches: Acetaminophen is generally better for mild headaches unless inflammation is involved.
- For Sore Throats: Ibuprofen is the better option for sore throats caused by inflammation, such as strep throat.
- For Earaches: Both acetaminophen and ibuprofen can relieve earache pain. If you need extended relief, alternating between the two may help reduce the risk of side effects.
- For Fever: Both drugs reduce fever effectively, so the choice depends on individual preference or tolerance.
- For Pain with Inflammation: Ibuprofen is preferred for conditions that involve swelling or redness, such as arthritis or injuries.
Key Differences Between Acetaminophen and Ibuprofen
Feature | Acetaminophen | Ibuprofen |
---|---|---|
Pain Relief | Yes | Yes |
Fever Reduction | Yes | Yes |
Inflammation Relief | No | Yes |
Primary Action | Works in the brain and spinal cord | Works in the brain and throughout the body |
Common Uses | General pain, headaches, fever | Pain with swelling, arthritis, fever |
Serious Risks | Liver damage at high doses | Heart attack, stroke, stomach ulcers |
The Bottom Line
Acetaminophen and ibuprofen are both effective pain relievers, but their differences make them more suitable for specific situations. Acetaminophen is ideal for general pain or fever, while ibuprofen is better for inflammation-related conditions. Always follow the recommended dosages and consult your doctor if you have any underlying health conditions or are taking other medications.
My hygienist pointed out clear evidence of mouth breathing in the form of tooth erosion and signs of bruxism (teeth grinding). I’d had no idea that mouth breathing could cause such problems, and as someone who prides herself on meticulous dental care after a cavity-filled childhood, this news hit hard.
So, after a quick Google search for “Has anyone died from mouth taping?” (spoiler: no recorded cases), I ordered some tape to try it out.
Here’s the short version: I didn’t manage to keep the tape on for a full night even once during my five-day trial. However, the experiment wasn’t a total bust. Here’s what happened.
How we reviewed this article:
Grand Health Insider follows strict sourcing standards, relying on peer-reviewed research, respected academic institutions, and reputable medical journals and associations. We are committed to using reliable, high-quality sources to ensure the accuracy and integrity of our content. Learn more about how we maintain content accuracy and stay current by reviewing our editorial policy.
Scientific sources:
- U.S. Food and Drug Administration (FDA). “Acetaminophen: Facts and Safety Information.”
- American Academy of Family Physicians. “NSAIDs and Their Use.”
- Mayo Clinic. “Acetaminophen vs. Ibuprofen: Uses and Risks.”
- National Institutes of Health (NIH). “Prostaglandins and Cyclooxygenase Pathways.”
- Cleveland Clinic. “Managing Pain Safely with Acetaminophen and NSAIDs.”