An alternative approach to the symptomatic treatment of parkinsonian patients with and without motor fluctuations is to use dual dopamine agonists. The aim of this study was to investigate the symptomatic effect of administrating a second dopamine agonist to parkinsonian patients already assuming pramipexole or ropinirole. As the second dopamine agonist we chose cabergoline, a drug with a long half life, whose pharmacological profile differs from that of the newer non-ergot-derived dopamine-receptor agonists. In this pilot study we enrolled 27 patients: 21 patients had motor fluctuations and were receiving levodopa plus a dopamine agonist, and 6 patients without motor fluctuations were receiving a dopamine agonist without levodopa. This open study shows that dual dopamine agonist therapy (cabergoline plus pramipexole or ropinirole) may be used in the symptomatic treatment of patients with Parkinson's disease receiving therapy with or without levodopa.