HDAC9 and drug-induced dyskinesia: With respect to other types of histone modifications (phosphorylation or phosphoacetylation) related to HDAC inhibitors, the association with both function of the ECB system modulated by CB agonists and behavioral alterations involving the stress-related neurotransmitter system (i.e. seizures or dyskinesias related to the DAergic system) has been reported, as mentioned above [57, 58].