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Comparison of the (Pro)convulsive Properties of Fluvoxamine and Clovoxamine with Eight Other Antidepressants in an Animal ModelKrijzer F. · Snelder M. · Bradford D.
Department of Pharmacology, Duphar B.V., Weesp, The Netherlands
Freely moving rats were implanted with cortical, caudal, thalamic, and reticular electrodes. Drugs were infused intravenously at a constant rate up to a final cumulative dose of 40, 50, or 60 mg/kg. Doses of 10 mg/kg imipramine, viloxazine, desmethylimipramine, mianserin, and maprotiline produced spike-wave complexes, spikes, and increased spindling. General sustained discharges occurred after 20 mg/kg of mianserin, viloxazine, imipramine, desmethylimipramine and amitriptyline, and after 30 mg/kg of maprotiline. An abnormal high-amplitude pattern was evident after mianserin, amitriptyline, imipramine, and desmethylimipramine. On the average, seizures were observed at 40 mg/kg and were seen after desmethylimipramine (50 mg/kg), mianserin (30 mg/kg), amitriptyline (20 mg/kg), imipramine (40 mg/kg), maprotiline (40 mg/kg), and zimelidine (50 mg/kg). Ranking the tested antidepressants in decreasing order in accordance with their relative (pro)convulsive properties gives:amitriptyline > mianserin >> imipramine > desmethylimipramine > viloxazine >> maprotiline >> zimelidine > clovoxamine > nomifensine = fluvoxamine.
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