PharmacologyLesson 1 of 1 in the course Pain Response Drugs

Nonopioid Analgesics and Related Pain Medicines: Actions and Safety

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Nonopioid analgesics treat pain without activating opioid receptors. Many work by affecting cyclooxygenase (COX), an enzyme involved in inflammation, pain signaling, and fever. This lesson introduces COX and its isoforms, acetaminophen, and medications sometimes used as adjuncts for neuropathic pain.

A nonopioid analgesic is a medication that treats pain without activating opioid receptors. Many nonopioid analgesics inhibit cyclooxygenase (COX), an enzyme involved in producing inflammatory mediators, including prostaglandins, prostacyclin, and thromboxane. These mediators contribute to redness, swelling, sensitization of nociceptors, and transmission of painful signals. COX also contributes to fever during infection, so some COX-inhibiting analgesics have antipyretic effects.

All flashcards

What are key roles of COX-1?
COX-1 supports platelet and renal function and helps maintain the stomach's protective mucosal barrier.
Does acetaminophen have meaningful anti-inflammatory action?
No. It relieves pain and fever but has little to no peripheral anti-inflammatory action.
How does aspirin affect platelets?
It irreversibly inhibits platelet COX, reducing platelet aggregation for the affected platelets' remaining lifespan.
What is a serious gastrointestinal warning sign during NSAID use?
Black, tarry stools can signal gastrointestinal bleeding and require prompt professional assessment.
What are tramadol's two main mechanisms?
It partially activates opioid receptors and inhibits norepinephrine and serotonin reuptake.

Quiz questions

  1. What is the typical effect of NSAID-mediated COX inhibition?Answer: It reduces inflammatory mediator production, decreasing pain, fever, and inflammation.
  2. How long can aspirin's antiplatelet effect persist after platelet COX is irreversibly inhibited?Answer: About 7–10 days, reflecting the remaining lifespan of affected platelets.
  3. Why can combining aspirin with an anticoagulant increase a client's risk?Answer: The combination can increase bleeding and bruising risk.
  4. Which description best explains tramadol's analgesic actions?Answer: It partially activates opioid receptors and inhibits norepinephrine and serotonin reuptake.
  5. Why is caution needed when considering tramadol for someone with a seizure history?Answer: Tramadol can lower the seizure threshold.

Based on Pharmacology for Nurses by Tina Barbour-Taylor, Leah Mueller (Sabato), Donna Paris, Dorie Weaver (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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