title: Why another anti-Parkinson drug?
mesh_terms: D000368:Aged; D000978:Antiparkinson Agents / Q000627:therapeutic use*; D006801:Humans; D010300:Parkinson Disease / Q000188:drug therapy*; D010627:Phenethylamines / Q000627:therapeutic use*; D012642:Selegiline / Q000627:therapeutic use*
chemical_list: D000978:Antiparkinson Agents; D010627:Phenethylamines; D012642:Selegiline