Toxic Delirium: Navigating the Fog of Chemical Confusion
Toxic Delirium: A Review of Diagnosis, Epidemiology, and Treatment
Abstract
Toxic delirium is an acute confusional state, often caused by drugs or other toxins, that is characterized by disorientation, fluctuating levels of consciousness, and psychomotor agitation or retardation. Its diagnosis and management can be challenging due to the wide variety of potential etiologies, the overlap of clinical features, and the lack of definitive testing. This review provides an overview of the diagnosis, epidemiology, and treatment of toxic delirium.
Introduction
Toxic delirium (TD) is an acute confusional state, often caused by drugs or other toxins, that is characterized by disorientation, fluctuating levels of consciousness, and psychomotor agitation or retardation (Gitlin, 2013). It is a serious condition with potential for significant morbidity and mortality (Vallabhajosula & Sun, 2015). Its diagnosis and management can be challenging due to the wide variety of potential etiologies, the overlap of clinical features, and the lack of definitive testing (Gitlin, 2013). This review provides an overview of the diagnosis, epidemiology, and treatment of toxic delirium.
Diagnosis
The diagnosis of TD is usually based on a combination of clinical features and laboratory findings. The most common clinical features include disorientation, fluctuating levels of consciousness, psychomotor agitation or retardation, delirious speech, sleep disturbances, and autonomic instability (Vallabhajosula & Sun, 2015). Laboratory tests can help to identify the cause of TD, but are not always definitive (Gitlin, 2013). Commonly used tests include toxicology screens, blood cultures, liver function tests, and cerebrospinal fluid analysis (Gitlin, 2013).
Epidemiology
TD is most commonly seen in the elderly, in individuals with a history of substance abuse, or in those taking multiple medications (Gitlin, 2013). The incidence of TD in the general population is unknown, as it is often under-recognized or misdiagnosed (Gitlin, 2013).
Treatment
The treatment of TD is aimed at correcting the underlying cause and alleviating symptoms. Treatment may include supportive care such as hydration, nutrition, and monitoring of vital signs. Pharmacologic interventions may include the use of sedatives, antipsychotics, and anticonvulsants (Vallabhajosula & Sun, 2015).
Conclusion
TD is a potentially serious condition with a wide variety of potential etiologies and clinical presentations. Early recognition and treatment are essential to minimize morbidity and mortality. Further research is needed to elucidate the epidemiology and improve the diagnosis and management of TD.
References
Gitlin, D.N. (2013). Delirium. In M.H. Ebert (Ed.), UpToDate. Retrieved from http://www.uptodate.com
Vallabhajosula, S., & Sun, E. (2015). Toxic delirium: A review. The American Journal of Emergency Medicine, 33(5), 726-732. doi: 10.1016/j.ajem.2014.11.035
