Predictors of quetiapine extended‐release formulation add‐on in older patients exposed to antidepressant drugs: A Danish register‐based cohort study

Objective This study investigated which comorbidities or comedications increased the probability of receiving quetiapine extended‐release formulation (quetiapine XR) as an add‐on treatment. Methods Danish administrative registers were used as data sources. The study period was from 01 January 2011 to 01 July 2017. New users of selective serotonin reuptake inhibitors (SSRI), serotonin and norepinephrine reuptake inhibitors (SNRI), atypical...