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A drug first discovered over 50 years ago and long used as a medicine for coughs and respiratory illnesses appears to show promise in treating a very different kind of sickness: Parkinson's disease. 有一种药50年前被发现，一直用于治疗咳嗽和呼吸道疾病，现在被发现能治疗一种完全不同的疾病：帕金森病。 Ambroxol, an active ingredient in cough mixtures since the 1970s, has been investigated in recent years for its apparent potential to halt the progression of Parkinson's, and already this year, the drug has passed two important milestones that may bring us closer to a much-hoped-for treatment. 20世纪70年代以来氨溴索一直是止咳药的有效成分，近些年调查了它在抑制帕金森病发展中的潜在作用，今年已经通过了两个重要测试阶段，可能使我们朝着期待已久的治疗目标更近了一步。 | 
