Non-Motor Adverse Effects The Udvalg for Kliniske Undersogelser: UKU side effect rating scale15 (48 items plus interference and action items, eight of which evaluate neurologic adverse effects) has been the only scale that was utilized in 13% of the studies in 2004. In 1999, merely one of the 35 studies evaluated non-motor adverse effects with the rating scale (UKU). On the other hand, the frequency of treatment-emergent (motor and non-motor) adverse effects has been occasionally described in tables (spontaneously reported or observed but without the usage of the formal scales).