SYNOPSIS
In a controlled double‐blind study of the therapeutic efficacy and clinical tolerance of lisuride hydrogen maleate (LHM), 25 mcg tid, and methysergide (MET), 2 mg tid, in 253 patients 50% or more reduction in number of attacks was noted in 53% of patients treated with LHM and in 51% of patients treated with MET. Thirty‐nine percent of the MET group and 17% of the LHM group discontinued the medications because of side effects (p<0.05, Chi2 test). Complaints of muscle weakness, coldness of extremities and dizziness were less common in the LHM group than in the MET group. It is suggested that LHM is as effective as MET in the prophylaxis of migraine and is associated with fewer side effects.
Dopamine receptors in intracerebral motor and endocrine systems have been divided into two main types, D-1 and D-2, dependent on the presence or absence of adenylate cyclase linkage. Here we have investigated a number of dopamine agonist and antagonist drugs in man that have different actions on D-1 and D-2 receptors in animals. Motor and endocrine effects in parkinsonian subjects seem to depend on drug interaction with D-2, but not D-1, receptors. These results may have important implications for the design of anti-parkinsonian and antipsychotic agents.
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