concentrations in food; they may even appear together at toxic concentrations. The present
work examines, via real-time cell analysis, whether histamine and tyramine show synergistic
toxicity towards intestinal cell cultures. Employing a constant equipotency ratio, their
interaction was examined via the combination index (CI) method of Chou & Talalay. Co-
treatment with tyramine and histamine was associated with a stronger cytotoxic effect than …