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Non-Opioid Analgesics | 마이메르시 MyMerci
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Non-Opioid Analgesics

NCLEX Review Guide: Non-Opioid Analgesics

Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)

Mechanism of Action & Classifications

  • NSAIDs inhibit cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis which decreases inflammation, pain, and fever.
  • Selective COX-2 inhibitors (celecoxib) target inflammation while preserving gastric protection, while non-selective NSAIDs (ibuprofen, naproxen) block both COX-1 and COX-2.
  • Common examples include ibuprofen (Advil), naproxen (Aleve), diclofenac (Voltaren), and indomethacin (Indocin).

Key Points

  • Maximum daily dose for ibuprofen: 3200mg; naproxen: 1375mg
  • Take with food to minimize GI irritation
  • Monitor for GI bleeding, especially in elderly patients

Contraindications & Precautions

  • Avoid in patients with active GI bleeding, severe heart failure, or third trimester pregnancy due to increased bleeding risk and potential for premature closure of ductus arteriosus.
  • Use cautiously in patients with hypertension, kidney disease, or history of cardiovascular events as NSAIDs can worsen these conditions.
  • Black box warning for increased risk of serious cardiovascular thrombotic events and GI adverse events.

Acetaminophen (Tylenol)

Pharmacokinetics & Dosing

  • Acetaminophen provides analgesic and antipyretic effects through central COX inhibition but has minimal anti-inflammatory properties.
  • Maximum daily dose: 4000mg for adults, 3000mg for elderly or those with liver disease to prevent hepatotoxicity.
  • Available in multiple formulations: oral tablets, liquid, suppositories, and IV (ofirmev) for hospitalized patients.

Memory Aid: "APAP Toxicity"

Acetylcysteine (antidote)
Poisoning signs: N/V, abdominal pain
ALT/AST elevation
Potentially fatal hepatic necrosis

Key Points

  • Safer for patients with GI issues, bleeding disorders, or kidney disease
  • Monitor liver function in chronic users
  • Check all medications for hidden acetaminophen content

Commonly Confused Points

Aspect NSAIDs Acetaminophen
Anti-inflammatory ✓ Yes ✗ Minimal
GI Risk ✓ High ✗ Low
Liver Toxicity ✗ Rare ✓ High risk with overdose
Kidney Effects ✓ Can worsen function ✗ Generally safe
Bleeding Risk ✓ Increased ✗ No effect

Clinical Scenario

A 65-year-old patient with osteoarthritis and history of peptic ulcer disease asks about pain management options. Acetaminophen would be the safer first-line choice due to lower GI risk, while NSAIDs should be avoided or used with proton pump inhibitors if absolutely necessary.

Study Tips & Memory Aids

NSAID Side Effects: "NSAID HARM"

Nephrotoxicity
Stomach ulcers
Asthma exacerbation
Increased bleeding
Dizziness/CNS effects

Hypertension
Allergic reactions
Renal impairment
Myocardial infarction risk

Quick Check Questions

  • ☐ Can you name the maximum daily doses for common analgesics?
  • ☐ Do you know when to choose acetaminophen over NSAIDs?
  • ☐ Can you identify contraindications for each drug class?
  • ☐ Do you understand the antidote for acetaminophen toxicity?

Common Pitfalls

  • Don't forget to assess for hidden acetaminophen in combination products
  • Remember that "natural" doesn't mean safe - many herbal supplements interact with analgesics
  • Always consider patient's complete medical history before recommending analgesics

You're building the knowledge foundation that will make you an exceptional nurse! Every concept you master brings you closer to providing safe, effective patient care. Keep pushing forward - your future patients are counting on your dedication to excellence!

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