RIMS Nursing Officer - 2022
Pharmacology
Easy
Which pharmacologic measure is effective for treating neuropathic pain?
Appeared in: RIMS Nursing Officer - 2022
Explanation
- Serotonin-norepinephrine reuptake inhibitors (SNRIs) are a first-line pharmacologic treatment for neuropathic pain.
- Their mechanism of action involves increasing the levels of serotonin and norepinephrine in the central nervous system.
- This enhancement of neurotransmitters strengthens the descending inhibitory pain pathways, which helps to suppress or 'turn down' the pain signals being sent from damaged nerves.
- Common examples of SNRIs used for neuropathic pain include duloxetine and venlafaxine.
Why Other Options Were Wrong
- Option A: Non-steroidal anti-inflammatory drugs (NSAIDs) primarily target inflammation by inhibiting prostaglandin synthesis. They are effective for nociceptive pain (e.g., from tissue injury or arthritis) but are generally ineffective for neuropathic pain, which arises from nerve dysfunction.
- Option C: Anti-helminthic drugs are designed to treat infections caused by parasitic worms. They have no mechanism of action related to the nervous system's pain pathways.
- Option D: Antibiotics are used to treat bacterial infections. They work by killing bacteria or preventing their reproduction and have no analgesic properties for treating nerve-related pain.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacological management of neuropathic pain as background academic context rather than a clinical decision trigger.
- Nurses play a crucial role in educating patients that the analgesic effects of SNRIs are not immediate and may take several weeks to develop. This counseling improves treatment adherence.
- It is essential to monitor patients starting on SNRIs for potential side effects, including nausea, dizziness, drowsiness, and changes in blood pressure. The principle of 'start low, go slow' is often applied to minimize these effects.
- What if? If a patient with diabetic neuropathy has a history of severe liver disease, an SNRI like duloxetine might be used with extreme caution or avoided, and an alternative like pregabalin (an anticonvulsant) might be preferred.
How to Approach the Question
- First, identify the key concept in the question: an effective treatment for 'neuropathic pain'.
- Recall that neuropathic pain is caused by damage or dysfunction of the nervous system, distinguishing it from nociceptive pain (from tissue injury).
- Systematically evaluate each option's primary pharmacological purpose.
- Eliminate options that do not target pain pathways. Anti-helminthics and antibiotics treat infections, not pain.
- Differentiate between the remaining pain medications. NSAIDs treat inflammatory/nociceptive pain.
- Identify the drug class known to modulate central pain signaling pathways. SNRIs alter neurotransmitter levels that are directly involved in the perception of neuropathic pain, making them the correct choice.
Concept Tested & Keywords
- Concept Tested: Pharmacological management of neuropathic pain
- Stem keywords: pharmacologic measure, neuropathic pain
- Lead-in keywords: effective
- Negative lead-in flag: false
Question ID
QGFjVpaoFVL-EctIdk8G0x
Reference Book
E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) pp. 8052-8054, 8053-8055, 8047-8049
Practise the full RIMS Nursing Officer - 2022
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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