Depression and alcohol withdrawal syndrome: is antidepressant therapy associated with lower rates of hospital readmission?

Interventions to Reduce Hospital and Emergency Department Utilization Among People With Alcohol and Substance Use Disorders: A Scoping Review

BACKGROUND

Substance use disorders (SUDs), prevalent worldwide, are associated with significant morbidity and health care utilization.

OBJECTIVES

To identify interventions addressing hospital and emergency department utilization among people with substance use, to summarize findings for those seeking to implement such interventions, and to articulate gaps that can be addressed by future research.

RESEARCH DESIGN

A scoping review of the literature. We searched PubMed, PsycInfo, and Google Scholar for any articles published from January 2010 to June 2020. The main search terms included the target population of adults with substance use or SUDs, the outcomes of hospital and emergency department utilization, and interventions aimed at improving these outcomes in the target population.

SUBJECTS

Adults with substance use or SUDs, including alcohol use.

MEASURES

Hospital and emergency department utilization.

RESULTS

Our initial search identified 1807 titles, from which 44 articles were included in the review. Most interventions were implemented in the United States (n=35). Half focused on people using any substance (n=22) and a quarter on opioids (n=12). The tested approaches varied and included postdischarge services, medications, legislation, and counseling, among others. The majority of study designs were retrospective cohort studies (n=31).

CONCLUSIONS

Overall, we found few studies assessing interventions to reduce health care utilization among people with SUDs. The studies that we did identify differed across multiple domains and included few randomized trials. Study heterogeneity limits our ability to compare interventions or to recommend one specific approach to reducing health care utilization among this high-risk population.

Both Ketamine and NBQX Attenuate Alcohol-Withdrawal Induced Depression in Male Rats

The co-morbidity between heavy drinking and depression can negatively influence successful cessation of alcohol use. Since ketamine, a glutamatergic NMDA receptor antagonist, has shown promise as a quick-acting antidepressant, we studied its effects specifically on alcohol withdrawal-induced depression. We also evaluated the effects of NBQX an AMPA/kainate receptor antagonist, because some of the effects of ketamine are proposed to be indirectly mediated through these receptors. Adult male Wistar rats were exposed daily to ethanol via inhalation chambers 4 h/day for 7 days (blood alcohol concentration=160 mg%), followed by daily intraperitoneal injections of ketamine (2.5 mg/kg), NBQX (5mg/kg), alone or in combination. Eighteen hours later, open field locomotor activity (OFLA) followed by forced swim test (FST) were performed. The animals were sacrificed 2 h later for evaluation of brain-derived neurotrophic factor (BDNF) in the hippocampus. Alcohol withdrawal did not affect OFLA, but caused an increase in immobility in FST, suggesting induction of "depressive-like" helplessness. Both ketamine and NBQX normalized the swimming score in FST. The combination of the two drugs, however, cancelled each other's effect. Parallel to these behavioral observations, both ketamine and NBQX normalized the reduction in hippocampal BDNF caused by alcohol withdrawal. Here also, the combination of the two drugs cancelled each other's effect. These results suggest that either NMDA or AMPA/kainate receptor antagonists, acting at least partially through hippocampal BDNF, may be of therapeutic potential in alcohol use disorder.