the kinetics of stable isotope-labelled l-threo-3 , 4-dihydroxyphenylserine ( l-threo-dops ) , an immediate precursor of ( - ) -norepinephrine , was studied to investigate the pharmacologic mechanism of its therapeutic effect on orthostatic hypotension in familial amyloid polyneuropathy ( fap ) and on akinesia and freezing in parkinsonism .
C0000378
l
C0020651
orthostatic hypotension