What is the mechanism of the pregabalin in neuropathic pain?

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Study for the Pain, Opioids, and Neuropsychiatric Pharmacology Test. Explore with flashcards and multiple choice questions; each query comes with hints and explanations. Prepare to excel in your exam!

Multiple Choice

What is the mechanism of the pregabalin in neuropathic pain?

Explanation:
Neuropathic pain is driven in part by enhanced release of excitatory neurotransmitters at pain-signal synapses. Pregabalin reduces this presynaptic release by binding to the alpha-2-delta subunit of voltage-gated calcium channels. This binding modulates the channel’s function so that during nerve firing less calcium enters the terminal, leading to decreased release of excitatory transmitters like glutamate and substance P. With less excitatory signaling in the dorsal horn, pain transmission and central sensitization diminish. This is different from activating GABA receptors, which pregabalin does not do, and it’s not an opioid receptor agonist or a sodium channel blocker.

Neuropathic pain is driven in part by enhanced release of excitatory neurotransmitters at pain-signal synapses. Pregabalin reduces this presynaptic release by binding to the alpha-2-delta subunit of voltage-gated calcium channels. This binding modulates the channel’s function so that during nerve firing less calcium enters the terminal, leading to decreased release of excitatory transmitters like glutamate and substance P. With less excitatory signaling in the dorsal horn, pain transmission and central sensitization diminish.

This is different from activating GABA receptors, which pregabalin does not do, and it’s not an opioid receptor agonist or a sodium channel blocker.

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