Adverse reactions to medication

Abstract

Adverse reactions to medication represent a major issue in inpatient psychiatry. This chapter systematically explores the most relevant, concerning, and problematic adverse effects routinely encountered in an inpatient setting. It describes the typical presentation, pathophysiology, incidence, and practical management of these problems. Extrapyramidal side effects including acute dystonia, drug-induced parkinsonism, akathisia, and tardive dyskinesia are considered before the chapter explores the rare but potentially life-threatening condition of neuroleptic malignant syndrome. Other adverse effects common to antipsychotics that are described include hyperprolactinaemia and psychotropic-induced arrhythmias including QTc prolongation. Sexual dysfunction is an under-recognized and undertreated adverse effect common to several classes of psychotropic medication and is also considered. Focusing on antidepressants, the chapter reviews the frequently encountered issue of hyponatraemia as well as serotonin syndrome and selective serotonin reuptake inhibitor-induced bleeding risk. Finally, the chapter addresses perinatal considerations for psychotropic drugs.