Enhanced Antibacterial and Anti-Inflammatory Activities of the Combination of Cannabis sativa and Propolis Extracts: An In Vitro Study.

Sore throat, commonly associated with pharyngitis and tonsillitis, is primarily caused by bacterial pathogens. Conventional therapies rely on antibiotics and anti-inflammatory drugs; however, concerns about adverse effects, antibiotic resistance, and drug interactions have encouraged the search for alternative remedies. Cannabis sativa L. (CS) has demonstrated potential in relieving sore throat and inflammation, while propolis, a bee-derived natural product, exhibits notable antibacterial and anti-inflammatory activities. This study aimed to investigate the enhanced antibacterial and anti-inflammatory effects of combining CS and propolis extracts (PE). Results found that CS and PE exhibited antibacterial effects against Streptococcus pyogenes DMST 4369, Staphylococcus aureus ATCC 25923, and Pseudomonas aeruginosa ATCC 9027. Their combination produced additive antibacterial effects against S. pyogenes and S. aureus. Cannabidiol (CBD) was identified as an active antibacterial constituent against S. pyogenes. Additionally, the PE-CBD in CS solution combination at concentration 625:0.125 µg/mL significantly reduced NO production and suppressed proinflammatory cytokines in LPS-stimulated macrophages. This study highlights the enhanced antibacterial and anti-inflammatory potential of the C. sativa and propolis combination, emphasizing the need to verify synergistic effects and determine the appropriate ratio for rational product development. Further research is needed to investigate the underlying mechanisms of action, particularly the anti-inflammatory pathways, in animal models. In addition, studies on hepatotoxicity should be conducted to ensure safety.