Sodium valproate in Huntington's chorea.

In a single-case study of Huntington's Chorea the effect of sodium valproate on motor behaviour was first compared with that of L-Dopa and than investigated further alone. Drug effect was assessed in terms of number of EMG-bursts with concurrent determinations of serum-levels of sodium valproate. The main result of this study was the development of a state of tolerance to sodium valproate.