Body & Beauty / Products / Acetaminophen / Tylenol (Liver Toxicity, #1 Acute Liver Failure)

Acetaminophen / Tylenol (Liver Toxicity, #1 Acute Liver Failure) — safety profile

Moderate risk

Acetaminophen (paracetamol) — the most widely used OTC analgesic/antipyretic.

What is this product?

Acetaminophen (paracetamol) — the most widely used OTC analgesic/antipyretic. #1 cause of acute liver failure in the US (~500 deaths/year). Therapeutic dose (≤4g/day adults) is only 2-3x below hepatotoxic threshold. 50% of acetaminophen overdoses are unintentional — from combining multiple products containing acetaminophen (NyQuil + Tylenol + prescription Vicodin). Pediatric dosing errors are common due to multiple formulations (infant drops vs children's liquid) with different concentrations.

What's in it

Click any compound name for its full safety profile, regulatory consensus, and exposure data.

Active Ingredient

Who's most at risk

  • Children — Developing endocrine and neurological systems, higher exposure per body weight
  • Infants — Developing organ systems, higher exposure per body weight, immature detoxification systems

Red flags — when to walk away

  • Health claims without FDA approval or clinical evidence — Product efficacy unverified.

Green flags — what to look for

  • FDA-approved, USP-verified, or physician-recommended — Verified safety and/or efficacy through established evaluation.

Safer alternatives

  • Ibuprofen for pain — different mechanism, no liver toxicity at therapeutic doses
  • NSAIDs for inflammation — acetaminophen has no anti-inflammatory effect
  • Non-pharmacological: ice, heat, rest, physical therapy — Alternative

Frequently asked questions

Who should be careful with Acetaminophen / Tylenol (Liver Toxicity, #1 Acute Liver Failure)?

Vulnerable populations identified for this product type: children, infants.

Are there safer alternatives to Acetaminophen / Tylenol (Liver Toxicity, #1 Acute Liver Failure)?

Yes — consider: Ibuprofen for pain; NSAIDs for inflammation; Non-pharmacological: ice, heat, rest, physical therapy. See the Safer alternatives section above for details.

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Reference data, not professional advice. Aggregates publicly available regulatory and scientific information. Why we built ALETHEIA →