Ultra-High-Performance Liquid Chromatography-Tandem Mass Spectrometry Analysis of Δ9-Tetrahydrocannabinol and Cannabidiol in Commercial Suk-Saiyasna Herbal Remedy: Applying Hansen Solubility Parameters for Sample Extraction to Ensure Regulatory Compliance.

Background: Suk-Saiyasna is a traditional Thai herbal remedy that comprises 12 distinct herbs. Among these, cannabis leaves constitute 12 of the total 78 components in this formulation. This study specifically examines the portion of the cannabis plant, which accounts for approximately 15.