Effect of long-term treatment with antiepileptic drugs on the vitamin status
1988
Krause, K.H. | Bonjour, J.P. | Berlit, P. | Kynast, G. | Schmidt-Gayk, H. | Schellenberg, B.
The status of vitamins A, B1, B2, B6, B12, C, D, and E as well as that of beta-carotene, biotin, and folate in the blood of over 500 epileptics was compared with that of a normal population. Male and female epileptics showed a poorer supply of vitamins B2, biotin, folate, and 25-hydroxycholecalciferol; the males, of only vitamin B6, B12, and E, and the women, of only vitamin A. Concentrations of beta-carotene and vitamin E in female epileptics were higher. The evaluation of relations between vitamin concentrations and mean daily dose, total dose of anticonvulsants, and duration of therapy suggested a possible influence of anticonvulsant medication on vitamins B1, B2, B6, C, D, E, beta-carotene, biotin, and folate. Concentrations of B vitamins as well as of folate were distinctly lower in patients under monotherapy with enzyme-inducing drugs than in those under valproate sodium. There was no relationship between bone mineral content and 25-hydroxycholecalciferol levels and between the neurographic parameters and the neurotropic vitamins of the B group, which also had no influence on concentration performance. Patients with poorer results in tests of the function of the central and the peripheral nervous system displayed a tendency towards lower vitamin-C levels. There were indications of potential links between immunological status and vitamin B6 and biotin. Males and females with a poorer supply of vitamin C, as well as males with lower riboflavin levels, showed a tendency towards macrocytic anaemia. Cerebellar disturbances were associated with lower concentrations of folate, of vitamin C or D, and possibly of biotin. The incidence of gingival hyperplasia could be linked to riboflavin, to biotin, and possibly also to vitamin C, D, or folate status.
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