Lipid peroxidation (LP) was analysed in the blood and atherogenic lipoproteins of 36 patients with ischemic stroke in the internal carotid arteries at the acute stage (1, 7 and 21 days). During 1-7 days 22 patients (group 1) were treated with haemocorrecting drugs (rheopolyglucin, euphyllin, aspirin, curantyl, trental) and 14 patients (group 2) were treated with vasoactive and metabolic drugs (cavinton, complamin, actovegin). On days 8-21 all the patients received the same treatment: pyracetam and essential. Before the treatment both activation of LP and exhaustion of endogenic antioxidant background were observed in blood samples of all the patients. Significant changes of LP parameters were observed in group 1 up to day 7, but they reached the basic level on the 21 day. No significant changes were observed in group 2. Thus, haemocorrecting drugs had some antioxidant effects, but to provide a steady antioxidant effect it is necessary to use special antioxidants.