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Prescribing

NSAID and acetaminophen dosing

Short-term analgesic dosing and safety reminders for musculoskeletal pain.

Last reviewed 2026-01-05|pain | msk | medication

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Dosing quick reference

Medication (generic)

Acetaminophen

Starting dose

500-1000 mg every 6 hours as needed

Typical titration / target

Max 3000 mg/day in older adults or liver disease

Monitoring / notes

Avoid combination products to reduce overdose risk.

Medication (generic)

Ibuprofen

Starting dose

400 mg every 6-8 hours with food

Typical titration / target

Max 2400 mg/day

Monitoring / notes

Avoid in CKD, HF, or high GI bleed risk.

Medication (generic)

Naproxen

Starting dose

250-500 mg twice daily with food

Typical titration / target

Max 1000 mg/day

Monitoring / notes

Consider PPI gastroprotection if high risk.

Contraindications

  • Avoid NSAIDs in active GI bleeding, severe renal impairment, or decompensated heart failure unless specialist-directed.
  • Avoid in known NSAID hypersensitivity or prior severe NSAID-related adverse reaction.
  • Avoid duplicate NSAID exposure from combination OTC and prescription products.

Renal and hepatic considerations

  • Review renal function, blood pressure, and GI risk before NSAID use.
  • Use extra caution with chronic kidney disease, dehydration risk, or concurrent nephrotoxic medications.
  • For acetaminophen-containing plans, account for liver disease and total daily dose limits.

Pregnancy and lactation cautions

  • Avoid NSAIDs in pregnancy (especially third trimester) unless explicitly indicated by specialist guidance.
  • Use pregnancy-compatible analgesic alternatives when possible.
  • During lactation, confirm medication choice and dosing with up-to-date compatibility guidance.

Monitoring checkpoints

  • Use the lowest effective dose for the shortest duration.
  • Reassess pain, function, and adverse effects at early follow-up.
  • Review hydration status and renal tolerance in higher-risk patients.

Stop or escalate criteria

  • Stop and escalate for GI bleeding symptoms, significant renal decline, allergic reaction, or uncontrolled hypertension.
  • Escalate when pain remains uncontrolled despite safer first-line strategies.
  • Escalate urgently for new neurologic deficits or other serious red-flag features.