Advocating for the inclusion of therapeutic drug monitoring in the national essential diagnostic list: Perspectives from psychiatrists.

India published its first edition of the National Essential Diagnostics List in 2019. The list depicts the list of diagnostic tests that can ensure affordable and quality healthcare delivery by removing barriers toward accessibility and reducing out-of-pocket expenditure. In 2024, the Indian Council of Medical Research has invited suggestions for revision of the list. Therapeutic drug monitoring (TDM) has been a promising modality and has been useful for a range of indications like monitoring medication adherence, diagnosing suboptimal treatment, detecting drug interactions, and guiding initiation or withdrawal of therapy. In this article, the authors make a case for inclusion of TDM for certain psychotropic drugs like lithium, sodium valproate, carbamazepine, and clozapine at the district hospital level. The authors have tried to justify the inclusion backed by recent evolving evidence.