Antibacterial activity of Δ9-tetrahydrocannabinol and cannabidiol


The minimum inhibiting concentrations (MIC) of Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD) for staphylococci and streptococci in broth are in the range of 1–5 μg/ml. In the same range, both compounds are also bactericidal. In media containing 4% serum or 5% blood the antibacterial activity is strongly reduced (MIC 50μg/ml). Gram-negative bacteria are resistant to THC and CBD.

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van Klingeren, B., ten Ham, M. Antibacterial activity of Δ9-tetrahydrocannabinol and cannabidiol. Antonie van Leeuwenhoek 42, 9–12 (1976).

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  • Antibacterial Activity
  • Minimum Inhibit Concentration
  • Inhibit Concentration
  • Minimum Inhibit Concentration
  • Cannabidiol