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The role of vitamin B12 at chronic antiepileptic drug treatment


A more systematic study of correlation of vitamin B12 levels and mental health. During the patient's stay in our clinic ward she mentioned hemodia, unstable walking, and a not elucidatory determinative weakness at both hands. After full neurological examination, we moved to the examination of B12 levels. As these levels were 150 pg/mL we started substitute treatment, provided that the patient had been taking antiepileptic medicine for years and had low toxicity of B12. At following neurological examinations the clinical icon of the patient had obviously improved. Carbamazepine and sodium valproate are widely used as maintenance treatment of bipolar disorder.Although the alteration of accumulation of B12 in serum is not totally acceptable by scientists [1], [2], [3], there are indications for the relation between antiepileptic medicine and reduced levels of B12 at least at cerebrospinal fluid folate [4]. Additionally, the combination of any inefficiency with the chronic alcoholism that is often present in this category of mental patients and the rise of life expectancy creates the need of a bigger demanded quantity of B12 in their diet.

Materials and methods

A female patient, with bipolar disorder II. Psychiatric and physical examination, laboratory tests, scientific review.


It has been over 20 years when an incident of a maniac patient without megaloblast anemia has been reported for the first time [5]. The role of B12 at nervous system function is widely known, either it concerns the spinal marrow disorders (dorsal and side phacycilus) or the anoia as pathogenic factor.It is obvious that the B12 can improve the neurologic symptoms of patients who receive chronic antiepileptic drug treatment, even though they do not have anemia [6].


It is worth taking into account if the test of B12 levels can or must be introduced in routine laboratory tests.


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Open Access This article is published under license to BioMed Central Ltd. This is an Open Access article is distributed under the terms of the Creative Commons Attribution 2.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Neroutsos, E., Vagionis, G. & Fiste, M. The role of vitamin B12 at chronic antiepileptic drug treatment. Ann Gen Psychiatry 7 (Suppl 1), S311 (2008).

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