The aim of this study was to present the clinical characteristics of and the evaluation methods for the motor complications sometimes observed in the early stages of Parkinson's disease, differentiating motor fluctuations and levodopa-induced dyskinesias. The most common forms of motor fluctuations are the predictable end-of-dose deterioration (wearing off), the early-morning akinesia, and the on-off phenomenon. Non-motor fluctuations are often associated with different symptoms: dysautonomia, pain, psychic or cognitive signs during off periods and sometimes also during on periods. Levodopa-induced dyskinesias are classified according to their temporal profile after drug administration, namely peak-dose dyskinesias (mainly choreic movements), biphasic dyskinesias--onset and end-of-dose--(mainly dystonic and ballic movements), and finally off-period dyskinesias (dystonic movements). Clinical evaluation of motor complications must be performed precisely to establish the best therapeutic strategy.