Weill Cornell -- NEW YORK (Jan. 11, 2010) — New research has shown that reducing the dosage of dopamine agonist (DA) drugs, a mainstay treatment for Parkinson’s disease (PD), sometimes causes acute withdrawal symptoms similar to those reported by cocaine addicts — including anxiety, panic attacks, depression, sweating, nausea, generalized pain, fatigue, dizziness and drug cravings. These symptoms can be severe, and are not alleviated by other PD medications.