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Effect of valproate, lamotrigine, levetiracetam and topiramate on (A) malondialdehyde (MDA) levels, (B) reduced glutathione (GSH) levels, and (C) superoxide dismutase (SOD) activity (expressed as % inhibition of pyrogallol oxidation) in brain tissue. Values are expressed as the mean ± SEM (n=6). P *<0.05 **<0.01 compared to control group.
