title: Ergot derivatives for Parkinsonism.
abstract: The response of Parkinsonism to three ergot derivatives which modify dopaminergic transmission was studied. CF 25-397 behaved more as an antagonist than an agonist. Lergotrile was an agonist with therapeutic properties marred by prominent hepatotoxicity. Bromocriptine is an effective anti-Parkinsonian agent, particularly useful in patients with prominent dyskinesia or "on-off" reactions to levodopa; in most patients optimal results have been obtained by combining from 40 to 90 mg of bromocriptine daily with approximately 60% of the previous maximal dose of levodopa. Unfortunately, only some 50% of patients tolerate long-term bromocriptine therapy, but all adverse reactions have been dose dependent and reversible.
mesh_terms: D001971:Bromocriptine / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004873:Ergolines / Q000627:therapeutic use*; D006801:Humans; D010300:Parkinson Disease / Q000188:drug therapy*; D011725:Pyridines / Q000627:therapeutic use
chemical_list: D004873:Ergolines; D011725:Pyridines; D001971:Bromocriptine