High-dose benzodiazepine use and QTc interval prolongation, a latent class analysis study

Area of Science:

• Addiction Medicine
• Cardiology
• Pharmacology

Background:

• Benzodiazepine (BDZ) addiction is a significant public health issue.
• Concomitant drug use in BDZ-dependent individuals, particularly females, raises concerns about QTc prolongation and associated cardiovascular risks.
• The precise relationship between BDZ use and QTc prolongation remains inadequately understood.

Purpose of the Study:

• To investigate the association between polysubstance use patterns and QTc prolongation risk in Italian adults with BDZ dependence.
• To identify distinct patient subgroups based on substance use and QTc prolongation risk.

Main Methods:

• Latent Class Analysis (LCA) was employed.
• Data were collected from 251 inpatients at the Addiction Medicine Unit in Verona.
• Patients were classified into three groups based on substance use and QTc prolongation risk.

Main Results:

• No statistically significant relationship was observed between QTc prolongation and benzodiazepine (BDZ) use across any of the identified patient classes.
• The findings indicate that even long-term and high-dose BDZ use did not correlate with increased QTc prolongation risk in this cohort.

Conclusions:

• Benzodiazepines (BDZs) appear to be safe concerning cardiovascular complications, specifically QTc prolongation, even with prolonged use and high dosages.
• This study suggests that BDZs may not contribute to QTc prolongation in patients with dependence, challenging previous assumptions.