Acetaminophen

General

• Type: Antipyretic
• Dosage Forms: IV; PO; PR
• Common Trade Names: Tylenol

Adult Dosing

General

• PO
  • Immediate-release
    • Regular strength: 650 mg q4-6 hours
    • Extra strength: 1000 mg q6 hours
  • Extended-release: 1300 mg q8 hours
• Rectal: 650 mg q4-6 hours
• IV:
  • <50 kg: 15 mg/kg q6 hours or 12.5 mg/kg q4 hours
  • ≥50 kg: 650 mg q4 hours or 1000 mg q6 hours
• Maximum daily dose: 4g

Pediatric Dosing

• 15 mg/kg/dose q6 hours

Special Populations

• Pregnancy Rating:
• Lactation:
• Renal Dosing
  • Adult
  • Pediatric
• Hepatic Dosing
  • Adult
  • Pediatric

Contraindications

• Allergy to class/drug

Adverse Reactions

Serious

• Acetaminophen (tylenol) toxicity

Warnings

• When calculating maximum daily dose consider all sources of acetaminophen
• Be careful that the dose in milligrams and milliliters is not confused

Pharmacology

• Half-life:
• Metabolism:
• Excretion:
• Mechanism of Action:

See Also

• Acetaminophen (tylenol) toxicity