https://pmc.ncbi.nlm.nih.gov/articles/PMC12500767/ - this is the study the GP is talking about.
Also: https://pubmed.ncbi.nlm.nih.gov/19962288/
> A multi-center, double-blind, randomised study of the Lavender oil preparation Silexan in comparison to Lorazepam for generalized anxiety disorder
Also: https://pubmed.ncbi.nlm.nih.gov/19962288/
FYI: CalmAid a brand name for Silexan, and Ativan is a brand name for Lorazepam.