Olanzapine and risperidone disrupt conditioned avoidance responding by selectively weakening motivational salience of conditioned stimulus: Further evidence

► Olanzapine and risperidone disrupted avoidance responding to two stimuli. ► Both drugs disrupted the weaker avoidance to a greater extent than the stronger one. ► Prior risperidone 1.0 mg/kg treatment enhanced sensitivity to olanzapine 0.5 mg/kg.