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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Characterization of the potential antioxidant and pro-oxidant actions of some neuroleptic drugs.

It has been suggested in the literature that neuroleptic drugs may be able to exert antioxidant and/or pro-oxidant actions in vivo. The feasibility of this was tested by measuring the ability of chlorpromazine, prochlorperazine, metoclopramide, methotrimeprazine and haloperidol to scavenge biologically relevant oxygen-derived species in vitro. None of the drugs reacted with superoxide radical at a significant rate. Chlorpromazine, prochlorperazine, metoclopramide and methotrimeprazine were very powerful scavengers of hydroxyl radicals, reacting at almost a diffusion-controlled rate. Chlorpromazine showed some ability to inhibit iron ion-dependent hydroxyl radical formation. Chlorpromazine, methotrimeprazine, promethazine and prochlorperazine were powerful inhibitors of iron ion-dependent liposomal lipid peroxidation, scavengers of organic peroxyl radicals and inhibitors of haem protein/hydrogen peroxide-dependent peroxidation of arachidonic acid. Chlorpromazine, prochlorperazine, metoclopramide, methotrimeprazine and haloperidol were powerful scavengers of hypochlorous acid. Haloperidol showed no ability to inhibit lipid peroxidation or to scavenge peroxyl radicals, and reproducibly increased lipid peroxidation catalysed by haem proteins, in both the presence and absence of hydrogen peroxide. The relevance of these in vitro observations to events in vivo is discussed.[1]


  1. Characterization of the potential antioxidant and pro-oxidant actions of some neuroleptic drugs. Jeding, I., Evans, P.J., Akanmu, D., Dexter, D., Spencer, J.D., Aruoma, O.I., Jenner, P., Halliwell, B. Biochem. Pharmacol. (1995) [Pubmed]
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