Swedish observational data show that people with existing depression or anxiety were less likely to have poor mental health when taking GLP-1 drugs. These data compared periods of drug use with periods when the same individuals did not use it. The study suggests a possible protective effect of GLP-1 drugs on the worsening of mental illness. The results come from an observational study published in MedPage Today. No other statistical figures are provided in the provided content. The study focuses on patients with pre-existing mental health problems.