CLONAZEPAM IN THE TREATMENT OF CHOREIFORM ACTIVITY: J. B. PEIRIS, M.D. (CEYLON), M.R.C.P. (U.K.),* H. BORALESSA, M.B., B.S. (CEYLON),† AND N. D. W. LIONEL, M.B., B.S. (CEYLON), F.R.C.P. (EDIN.)‡

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Abstract
In a limited study, clonazepam, a newbenzodiazepine derivative, has been found to be effective in suppressing choreiform movements in three patients with Huntington's chorea, three patients with non‐familial chorea, and in one patient with senile chorea. In two patients with chorea of doubtful aetiology the response was not very satisfactory. A simple method was used to assess objectively the effect on choreiform movements. The effective dose varied from 3�5 to 5� 5 mg a day. The drug was well tolerated by most of the patients.