Drugs that reduce or prevent the severity of an epileptic convulsion or seizure (see EPILEPSY). The nature of the ﬁt, and the patient’s reaction to it, inﬂuences the type of anticonvulsant used. Anticonvulsants inhibit the high level of electrical activity in the brain that causes the ﬁt. Among regularly used anticonvulsants are carbamazepine, sodium valproate, clonazopam, lamotrigine, gabapentin, vigabatrin, and topiramate. Older drugs such as phenytoin and primidone remain useful in some patients. Intravenous anticonvulsants, such as diazepam, are used for rapid control of epileptic status.
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