NSAID and acetaminophen dosing
Short-term analgesic dosing and safety reminders for musculoskeletal pain.
Last reviewed January 5, 2026
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.
Dosing
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.
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.
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.
| Medication (generic) | Starting dose | Typical titration / target | Monitoring / notes |
|---|---|---|---|
| Acetaminophen | 500-1000 mg every 6 hours as needed | Max 3000 mg/day in older adults or liver disease | Avoid combination products to reduce overdose risk. |
| Ibuprofen | 400 mg every 6-8 hours with food | Max 2400 mg/day | Avoid in CKD, HF, or high GI bleed risk. |
| Naproxen | 250-500 mg twice daily with food | Max 1000 mg/day | Consider PPI gastroprotection if high risk. |
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.
References
Something out of date or unclear? Suggest an update. Leave out any patient details.