Patients with anxiety disorders should continue to pursue counseling and therapy to manage their illness, Levine said, adding that medical marijuana strains with low tetrahydrocannabinol (THC) and greater cannabidiol (CBD) content seem to be more effective for the treatment of anxiety. THC is the compound in cannabis that produces the feeling of being high, but can also trigger anxiety. CBD is thought to moderate the effects of THC, though there is insufficient scientific evidence.