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- W1980158020 abstract "We investigated the effect of clonidine on intravenous (iv) lidocaine-induced haemodynamic changes and convulsions in awake rats. Wistar rats (200–250 g) were divided into three groups of eight and were pretreated with iv clonidine or normal saline 15 min before lidocaine infusion. Group 1 received normal saline; Group 2, 1 μg · kg−1 clonidine; and Group 3, 10 μg · kg−1 clonidine. After surgical preparation and recovery from anaesthesia, all groups received a continuous iv infusion of lidocaine (15 mg · ml−1) at a rate of 4 mg · kg−1 · min−1 until generalized convulsions occurred. Oxygenation was well maintained in all groups. Pretreatment with clonidine changed neither cumulative convulsant doses (Group 1: 41.8 ± 2.2, Group 2: 43.8 ± 2.6, Group 3: 42.3 ± 2.0 mg · kg−1, respectively) nor plasma concentrations of lidocaine at the onset of convulsions (Group 1: 10.5 ± 0.3, Group 2: 10.8 ± 0.3, Group 3: 10.6 ± 0.3 μg · ml−1, respectively). The mean arterial blood pressures in Groups 2 and 3 were decreased after clonidine pretreatment (Group 2: 93 ± 1, P < 0.01, Group 3: 90 ± 1%, P < 0.01, respectively) and they gradually increased during lidocaine infusion. The heart rates decreased after clonidine pretreatment (Group 2: 94 ± 2, P < 0.05, Group 3: 86 ± 2%, P < 0.01, respectively) and the combination of clonidine and lidocaine potentiated the bradycardic effect of lidocaine at a subconvulsant dose. Our results indicate that clonidine has neither anticonvulsant nor proconvulsant effects on lidocaineinduced convulsions. However, the interactions of clonidine and lidocaine on blood pressure and heart rate should be investigated further." @default.
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- W1980158020 title "Clonidine does not affect lidocaine seizure threshold in rats" @default.
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- W1980158020 doi "https://doi.org/10.1007/bf03009611" @default.
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