Updated on December 30, 2025
Written by: Ahsan Riaz
Reviewed by: Dr. Diana Rangaves, PharmD, RPh — Pharmacist, Medical Writer, and Author
The L484 pill is a white, oval tablet with the imprint L484.
It is not a narcotic.
It is not hydrocodone.
It contains 500 mg acetaminophen.
You can buy it over the counter in the United States.
People use it to reduce pain and lower fever.
What Is the L484 Pill?
Containing acetaminophen 500 mg, this pill works as a pain reliever and fever reducer.
This tablet is similar to Extra Strength Tylenol and is often sold as a generic version.
You may find it in stores like Walmart, CVS, Walgreens, Target, and other pharmacies.
Pill Identification Details
The pill is white, oval, and marked with “L484” on one side.
It contains 500 mg acetaminophen.
It is usually sold as a generic store brand pain reliever.
Inactive fillers may vary by manufacturer, but the active ingredient is the same as Extra Strength Tylenol.
Oval vs Oblong: Do these Tablets Differ?
Both names describe the same pill, but the difference is in the form and how people see it.
Whether someone calls it oval or oblong, it’s still acetaminophen 500 mg.
Some brands press the pill a little longer or more rounded, but the active ingredient is the same.
What Is the L484 Pill Used For?
For relief, this medication is used for:
- headaches
- toothaches
- back pain
- fever
- menstrual cramps
- muscle pain
- cold and flu pain
It helps mild to moderate pain.
It does not treat swelling like ibuprofen.
Is this Pill a Narcotic or Hydrocodone?
No.
This pill is not a narcotic.
It is not hydrocodone.
It does not cause a “high.”
So, it is not addictive in the same way opioid painkillers are.
Brand and Manufacturer Information
This tablet is available under various brands. It is a generic acetaminophen tablet made by different companies and sold under many store labels.
You may find it in Walmart, CVS, Walgreens, Amazon, and other pharmacy brands.
Dosage Guidelines
Always follow the label.
Do not guess the dose.
Too much acetaminophen can damage the liver.
Adult Dose
Most adults take:
500 mg to 1000 mg per dose, every 4–6 hours as needed.
Do not take more than:
4,000 mg in 24 hours
Many doctors even suggest staying under 3,000 mg per day for safety.
Children
Do not give this pill to young children unless told by a doctor.
Children usually need pediatric liquid or children’s strength medicine based on age and weight.
Common Side Effects
Most people have no serious side effects.
Still, some may feel:
- nausea
- upset stomach
- dizziness
- tiredness
These are usually mild.
If symptoms feel severe, seek help.
Rare but Serious Side Effects
Most people do not have bad reactions.
Call a doctor right away if you notice:
- Severe rash or skin peeling
- Swelling of the face, lips, or throat
- Trouble breathing
- Severe weakness or fainting
Serious Risks and Liver Damage
Acetaminophen can harm the liver if taken incorrectly.
This is the biggest risk.
High risk happens when:
- you take too many pills
- you drink alcohol often
- you already have liver disease
- you combine it with other acetaminophen medicines
Liver damage can be serious.
It may even become life-threatening.
Kidney Risk Warning
Very high doses or long-term use may also affect the kidneys.
This risk increases if you are dehydrated or already have kidney disease.
Do not use more than the safe dose.
Signs of Overdose
Get medical help right away if someone:
- feels very sick
- vomits heavily
- has stomach pain
- looks yellow in eyes or skin
- feels confused or weak
Call Poison Control (U.S.) at 1-800-222-1222 or seek emergency care.
Do not wait.
Overdose damage may start quietly, then get worse.
Precautions and Warnings
Be careful if you:
- drink alcohol often
- have liver problems
- take blood thinners
- use cold or flu meds with acetaminophen already in them
Many cold and flu products also contain acetaminophen.
People overdose because they do not realize they are double dosing.
Always read labels.
Drug Interaction Warning
Do not take this tablet with:
- Other acetaminophen medicines
- Cold or flu products containing acetaminophen
- Blood thinners like warfarin unless your doctor approves
Always check labels to avoid double dosing.
Alcohol and acetaminophen: Is it safe?
Mixing acetaminophen with alcohol is dangerous.
It increases liver stress.
Do not take it if you drank heavy alcohol recently unless a doctor says it is safe.
Is this medication safe during pregnancy?
Many doctors allow acetaminophen in pregnancy when needed.
Still, always talk to your doctor first.
Never self-medicate during pregnancy without advice.
Long-Term Use
Do not use acetaminophen long term without medical guidance.
Daily use for many weeks may harm your liver.
If you always need pain relief, talk to a doctor.
How Long Does this Pill Stay in Your System?
Pain relief usually lasts 4 to 6 hours.
Most of it leaves the body in about 24 hours, but this can be slower if you have liver problems.
Is the L484 Pill Addictive?
No.
It does not create addiction like opioids.
Still, using it safely is important.
Can You Take L484 with Ibuprofen?
Many doctors allow using acetaminophen with ibuprofen in some situations.
But never mix medicines without guidance.
Ask your doctor or pharmacist first.
Overdose: What Should You Do?
If you think you took too much:
- seek emergency help
- do not wait for symptoms
- call Poison Control in the U.S.
Early treatment can protect your liver.
Safe Storage
Keep pills in a safe place.
Keep away from children.
Do not share medicine with anyone.
Children and this medication
Do not give the 500 mg dose of this medication to young children.
Children should use pediatric acetaminophen based on weight and age.
Follow dosing instructions or ask a doctor.
Final Thoughts
The L484 pill is a helpful pain and fever medicine.
It works well when used correctly.
But too much can harm your liver.
Use the right dose.
Read labels.
Ask a doctor if you are unsure.
FAQs
What is the L484 pill?
A white, oval tablet containing 500 mg acetaminophen. It is non-narcotic and available over the counter in the USA.
What is this pill used for?
Mild to moderate pain, including headaches, toothaches, muscle pain, back pain, menstrual cramps, and fever reduction.
Is this pill safe for children?
Children should use pediatric formulations based on age and weight. The 500 mg tablet is not for young children unless approved by a doctor.
Can acetaminophen harm your liver?
Yes. Taking too much, mixing with alcohol, or combining with other acetaminophen products can harm the liver.
Is it safe to combine this medication with alcohol or ibuprofen?
Alcohol increases liver risk. Ibuprofen can be combined in some situations, but consult a doctor first.
Is this pill addictive?
No. It is non-narcotic and not addictive.
How long does acetaminophen stay in your system?
Relief lasts 4–6 hours. Most leaves the body in about 24 hours.
Sources
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
[…] Both Tylenol and Tylenol Arthritis contain acetaminophen, but they differ in strength and duration of action. Acetaminophen is generally safe when used as directed. However, taking too much can cause serious liver damage. […]