impaired behavioral response to xenobiotic abnormal behavioral response to addictive substance impaired behavioral response to addictive substance MP:0009750 MPheno.ontology impaired behavioural response to addictive substance decreased sensitivity to an addictive substance capable of inducing the appearance of behavioral response, such as induced hyperactivity or stereotypic behavior, or increased dosage threshold for the appearance of the behavioral response decreased rate of behavioral response to addictive substance