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  • Title: Changes in circulating androgens during short term carbamazepine therapy.
    Author: Connell JM, Rapeport WG, Beastall GH, Brodie MJ.
    Journal: Br J Clin Pharmacol; 1984 Mar; 17(3):347-51. PubMed ID: 6231939.
    Abstract:
    Serum concentrations of testosterone, androstenedione, dehydroepiandrosterone sulphate (DHAS), sex hormone binding globulin (SHBG) and luteinising hormone (LH) were measured before, during and after 21 days treatment with carbamazepine (CBZ)400 mg daily in six healthy male subjects. Induction of hepatic microsomal enzyme activity was confirmed by an increase in antipyrine clearance (P less than 0.02) and a fall in circulating CBZ concentrations from the seventh to the fourteenth CBZ dose (P less than 0.05). Within 7 days of starting CBZ there was a rise in SHBG (P less than 0.05) and a fall in testosterone, free testosterone fraction, DHAS and androstenedione (P less than 0.05). Testosterone, free testosterone fraction and androstenedione levels rose towards baseline by the end of the treatment period while DHAS concentration remained low (P less than 0.05). The rise in SHBG and increased androgen catabolism is most likely to be secondary to induction of hepatic monooxygenase activity by CBZ. These changes may be implicated in the production of sexual dysfunction encountered in some epileptic patients on chronic anticonvulsant therapy.
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