Tricyclic antidepressants (TCAs) are a class of medications previously commonly prescribed for the treatment of depression and other mood disorders. The presence of these substances, or their metabolites, can be detected during toxicological screenings. For example, the metabolite nortriptyline can be identified through analysis of a urine sample.
Detection of these compounds is important for several reasons. It can verify patient adherence to prescribed medications, identify potential misuse or abuse, and contribute to the diagnosis of drug-induced toxicity. Historically, identifying these substances has been crucial in clinical settings to understand patient response to treatment and to guide dosage adjustments.