Are There Any Side-Effects Possible from Vaping CBD? Hudson R, Renard J, Norris C, Rushlow WJ, Laviolette SR. Cannabidiol counteracts the psychotropic side-effects of Δ-9-tetrahydrocannabinol in the ventral hippocampus through bidirectional control of ERK1-2 phosphorylation. https://youtu.be/jBPGnvG73eI