73岁的Glenn Peterson在服用更高剂量的多巴胺激动剂治疗帕金森病后，遭遇了意想不到的副作用。[1]Peterson已被确诊帕金森病8年，一直在服用多巴胺前体药物和多巴胺激动剂。[1]增加多巴胺激动剂的剂量后，他开始出现强迫性赌博、反复的性观念困扰，以及夜间沉溺于游戏和赌博的行为。[1]在神经学家的指导下降低药物剂量后，这些强迫行为完全消失。[1]
多巴胺激动剂药物在帕金森患者中诱发冲动控制障碍并非罕见现象。[1]研究表明，约15-20%的帕金森病患者在使用此类药物后会出现冲动控制障碍。[1]UNSW行为神经科学家Karly Turner解释了其中的机制："不同的药物作用方式不同...但当我们口服药物时，它会对整个大脑产生效果——而不仅仅是我们想要靶向的电路。"[1]临床心理学家Anastasia Hronis补充指出，这一问题并非仅限于帕金森病，ADHD与多巴胺的失调激活有关，而不仅仅是缺乏。[1]
Glenn Peterson, a 73-year-old patient living with Parkinson's disease for eight years, experienced severe compulsive behaviors after increasing his dopamine agonist medication dosage [1]. The troubling side effects included compulsive gambling, intrusive sexual thoughts, and obsessive nighttime gaming and betting habits [1]. Following his neurologist's guidance to reduce the medication dose, these compulsive behaviors disappeared entirely [1].
Peterson's case illustrates a significant clinical concern: dopamine agonist medications cause impulse control disorders in approximately 15 to 20 percent of Parkinson's patients [1]. According to behavioral neuroscientist Karly Turner from UNSW, the problem stems from how medications affect the brain broadly rather than targeting specific circuits. "Different medications work in different ways," Turner explained, "but when we take oral medication, it has an effect on the entire brain—not just the circuit we want to target" [1]. Clinical psychologist Anastasia Hronis added that conditions such as ADHD are linked to dysregulated dopamine activation rather than simple deficiency [1].