A pill stamped with L484 is acetaminophen 500 mg, commonly sold as “extra strength” pain relief. It’s a white, oblong caplet about 16 mm long, available over the counter at major retailers including Kroger and Walmart under their store-brand labels. This is the same active ingredient found in Tylenol Extra Strength.
What the L484 Pill Is Used For
Acetaminophen at the 500 mg strength is one of the most widely used pain relievers and fever reducers in the United States. It’s effective for headaches, muscle aches, menstrual cramps, toothaches, minor arthritis pain, and reducing fever from colds or flu. Unlike ibuprofen or aspirin, it doesn’t reduce inflammation, so it works best for pain and fever rather than swelling.
The “L484” imprint is simply a manufacturer code that helps identify the pill. Every legitimate tablet or caplet sold in the U.S. carries a unique imprint so it can be looked up if someone finds a loose pill and needs to confirm what it is. In this case, L484 appears on store-brand versions of extra strength acetaminophen sold by retailers like Kroger and Walmart (under the Equate label).
Dosage for Adults and Children
The standard adult dose is two caplets (1,000 mg total) every six hours as needed. You should not take more than six caplets (3,000 mg) in 24 hours unless a doctor has told you otherwise. The FDA sets the absolute maximum at 4,000 mg per day for adults, but many healthcare professionals recommend staying below that ceiling to protect your liver.
Children under 12 should not take 500 mg extra strength acetaminophen products. Lower-dose children’s formulations exist with dosing based on weight, and those are the appropriate choice for younger kids.
Why the Daily Limit Matters
Acetaminophen is safe at recommended doses, but it has a narrower margin of safety than many people realize. The gap between a therapeutic dose and a harmful one is relatively small compared to other over-the-counter painkillers. Taking too much damages the liver because the body converts a small portion of each dose into a toxic byproduct. At normal doses, your liver neutralizes this byproduct easily. At high doses, the liver can’t keep up.
The trickiest part is that acetaminophen is an active ingredient in more than 600 over-the-counter and prescription medications, including cold and flu remedies, allergy medicines, sleep aids, and combination pain products. It’s easy to double up without knowing it. If you’re taking an L484 pill for a headache and also using a nighttime cold medicine, check the label on both. Stacking two acetaminophen-containing products is one of the most common paths to accidental overdose.
Alcohol and Liver Risk
Drinking alcohol while using acetaminophen increases the risk of liver damage. Chronic alcohol use changes the way your liver processes the drug, producing more of the toxic byproduct that can injure liver cells. This doesn’t mean a single glass of wine with an occasional Tylenol is dangerous for most people, but regular heavy drinking and routine acetaminophen use is a genuinely risky combination.
Heavy drinking is generally defined as four or more drinks on any day for women, or five or more for men. If that describes your drinking pattern, acetaminophen may not be the safest choice for everyday pain relief.
Signs of Too Much Acetaminophen
Early symptoms of acetaminophen overdose can be deceptively mild or even absent. In the first 24 hours, the most common signs are nausea, vomiting, sweating, loss of appetite, and general tiredness. Some people feel nothing unusual at first, which is part of what makes overdose dangerous. Liver damage may already be underway before symptoms become obvious.
If you or someone else has taken significantly more than the recommended dose, don’t wait for symptoms to appear. Effective treatment exists, but it works best when given early, before the liver has sustained serious injury.
How to Verify a Pill Yourself
If you’ve found a loose pill and want to confirm its identity, several free tools can help. The Drugs.com Pill Identifier lets you search by imprint code, color, and shape. The FDA’s DailyMed database, run by the National Library of Medicine, lists detailed drug label information for every product sold in the U.S. by its National Drug Code. For L484, the NDC is 30142-0484 (Kroger) or you can find it under Walmart’s Equate label as well.
Any white, oblong caplet stamped L484 with no other markings is acetaminophen 500 mg. If the pill you’re looking at has additional imprints, a different color, or a different shape, it’s a different medication and you should look it up separately.