Abstract
The clastogenic effects of imipramine on chromosomes have been investigated in leukocyte cultures from seven healthy blood donors (2 male and 5 female), repeat cultures being initiated at intervals of 6 to 12 weeks. At various times prior to harvesting nine different doses of imipramine were added in vitro, the three lowest concentrations being within the range of plasma levels reported in psychiatric patients receiving the drug therapeutically. In addition, streptonigrin was used as a positive control. No increase in chromosome breaks was found at any concentration for any duration of exposure even in those cultures where high concentration and/or long duration of exposure significantly suppressed cell growth. Only cultures to which streptonigrin had been added showed a significant increase in chromosome breaks.
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