Assessment of Treatment Patterns in Patients with Alcohol Withdrawal Syndrome during Hospitalisation and Post-discharge: A Retrospective Cohort Study

Abstract

Introduction: Alcohol dependence is an increasing and pervasive problem. Alcohol Withdrawal Syndrome (AWS) is a cluster of symptoms that occur in alcohol-dependent individuals after cessation or reduction of alcohol consumption. However, studies on the clinicoepidemiological profile of patients with AWS and treatment patterns in India are scarce. Aim: To assess the treatment patterns during hospitalisation and after discharge in Indian patients with AWS. Materials and Methods: A retrospective observational study was conducted using data from 1000 patients with AWS who were admitted to nine addiction centres across India. Data from medical charts from the previous five years were collected over six months, from January to June 2022. The study included patients of either sex, aged ≥18 years at the time of data collection, who had been hospitalised for AWS symptoms and had ≥3 months of documented follow-ups. The primary endpoints of the study were the most commonly used medications and their dose titrations in the treatment of AWS, as well as the duration of treatment in the hospital and post-discharge. Key secondary endpoints included the socio-demographic profile of patients, common comorbidities, common signs and symptoms, the association between prescription patterns of Benzodiazepines (BZDs) and liver enzyme levels, and the average duration of hospital stay. Continuous variables were summarised as mean and Standard Deviation (SD), while categorical variables were summarised as frequency and percentages. Levels of serum Aspartate Aminotransferase (AST), Alanine Transaminase (ALT), γ-Glutamyl Transferase (GGT), and bilirubin were recorded from the source data, if available, and the association with the use of chlordiazepoxide and lorazepam was analysed using the Chi-square test. Results: The mean±SD age of the 1000 enrolled patients was 41.4±9.6 years, with the majority (n=997; 99.7%) being males. BZDs were the mainstay pharmacotherapy, with lorazepam (n=686; 68.6%) and chlordiazepoxide (n=482; 48.2%) being the two most commonly prescribed BZDs during hospitalisation. During post-discharge treatment, 57.0% (n/N=74/130) of patients received lorazepam, while 52.0% (n/N=67/130) received chlordiazepoxide. Frequently used drug regimens during hospitalisation included fixed doses of chlordiazepoxide {25 mg twice a day (BID:143/482; 29.7%), 20 mg thrice a day (TID:103/482; 21.4%), or 25mg TID (87/482; 18.0%)}, or lorazepam {2 mg TID (188/686; 27.4%), 2 mg BID (183/686; 26.7%), or 2 mg once a day (OD;175/686; 25.5%)}. Commonly observed signs and symptoms included tremors (n=567; 56.7%), irritability (n=539; 53.9%), and agitation (n=500; 50.0%). Depression (n=182; 18.2%) and anxiety (n=136; 13.6%) were the most commonly reported co-morbidities. Among the patients, only 13.4% (86/641) had an AST/ALT ratio >2, and 12.9% (44/340) had AST and GGT levels >2× Upper Limit of Normal (ULN). There was no significant difference in these patients between those receiving and not receiving chlordiazepoxide (p>0.05). The mean±SD duration of hospitalisation was 23.1±18.97 days, while the mean±SD duration of treatment during hospitalisation and post-discharge was 22.3±16.36 days and 71.6±52.3 days, respectively. Conclusion: The two most commonly prescribed drugs during hospitalisation and post-discharge were the BZDs, lorazepam and chlordiazepoxide. Fixed-dose regimens of chlordiazepoxide at 25 mg BID or TID, or 20 mg TID, and lorazepam at 2 mg TID, BID, or OD were frequently used during hospitalisation.