Fluctuation between cigarette smoking and use of electronic nicotine delivery systems: Impact on clozapine concentrations and clinical effect.

Unlike with smoking cigarettes, electronic nicotine delivery systems do not cause CYP450 1A2 induction as there is a lack of combustion and polycyclic aromatic hydrocarbon production. Changing to the use of an electronic nicotine delivery system from cigarettes can result in the deinduction of CYP450 1A2 and the increase of certain medication serum concentrations, including clozapine. A case is reported in which the switch from smoking to an electronic nicotine delivery system resulted in increased clozapine serum concentration and constipation, necessitating pharmacologic management. The patient ultimately transitioned back to cigarettes, which resulted in the emergence of psychiatric symptoms. An evaluation of longitudinal serum concentrations and clinical correlation is provided. It is important that patients and health care professionals have knowledge not only about the impact of smoking cigarettes on clozapine metabolism, but also the effects of switching to or from an electronic nicotine delivery system.

Palliative Care: Critical Concepts for the Geropsychiatrist.

Psychiatrists can make a significant contribution to improving quality end-of-life care for psychiatric patients, beyond managing their psychiatric and psychological conditions. Geriatric psychiatrists can build expertise in enhancing end-of-life care when caring for older adults with serious illnesses and their families, given the biopsychosociospiritual approach that significantly overlaps with palliative and hospice care approaches. To effectively add quality to end-of-life care, it is essential for psychiatrists to understand the core principles and practices of palliative and hospice care, learn basic symptom management skills, and hone the ability to have crucial conversations regarding prognosis and advance care planning. Also important is recognizing when to refer to hospice and palliative medicine subspecialists. This article provides an overview of palliative and hospice care, uses a case study to illustrate components of palliative and hospice care relevant to geriatric psychiatry practice, and comments on considerations pertinent to the coronavirus disease 2019 (COVID-19) pandemic.