Objective: To describe a case of cross hepatotoxicity between tricyclic antidepressants and phenothiazines.
Patient: A woman who developed three episodes of drug-induced hepatitis within 3 years as a result of successive treatment with two tricyclic antidepressants, trimipramine and desipramine, and one neuroleptic derivative, cyamemazine.
Interventions: The drugs were withdrawn after the patient experienced liver dysfunction, although bromazepam was later administered with no side effects.
Results: After three episodes of drug-induced hepatitis the patient's serum aspartate aminotransferase and alanine aminotransferase levels returned to normal when the tricyclic antidepressants and cyamemazine were withdrawn.
Conclusions: Trimipramine, desipramine and cyamemazine are related by their chemical structures which include a tricyclic ring. This suggests that this chemical moiety might be involved in the hepatotoxicity of tricyclic antidepressants and phenothiazine derivatives.