• Der Schmerz · Jun 1992

    [Anticonvulsant agents in neuralgic pain.].

    • I Jurna and M Zenz.
    • Institut für Pharmakologie und Toxikologie der Universität des Saarlandes, W-6650, Homburg/Saar, Bundesrepublik Deutschland.
    • Schmerz. 1992 Jun 1;6(2):146-9.

    AbstractThe anticonvulsants, carbamazepine, clonazepam, phenytoin, and valproic acid are capable of depressing attacks of shooting pain in neuralgia. Shooting pain is perceived in trigeminal, intercostal, and other neuralgias, as a consequence of infectious diseases such as herpes zoster, and in the course of polyneuropathies of various causes. It is due to injury of nociceptive afferents, which generate bursts of activity in response to appropriate environmental changes. The anticonvulsant agents have no analgesic property per se, so that background pain remains unchanged. The depression of shooting pain results from the anticonvulsant action of the compounds. Both carbamazepine and phenytoin block synaptic transmission of neuronal hyperactivity by a direct depressant action that includes reduction of sodium conductance and by activation of inhibitory control. Clonazepam and valproic acid act by enhancing GABA-mediated inhibition of synaptic transmission. Carbamazepine is by far the most widely used compound; phenytoin, clonazepam, and valproic acid are not so popular because of their side effects.

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