A patient has developed symptoms of rigidity and bradykinesia. Which of the following medications has been linked to secondary parkinsonism?
A) Haloperidol
B) Furosemide (Lasix)
C) Psyllium hydrophilic mucilloid (Metamucil)
D) Valproic acid (Valproate)
A
Feedback:
Drugs that deplete dopamine stores or block dopamine receptors, including the older antipsychotic drugs (phenothiazines and haloperidol), reserpine, and metoclopramide, can produce movement disorders such as secondary parkinsonism. Furosemide does not deplete dopamine stores. Psyllium does not deplete dopamine stores. Valproic acid does not deplete dopamine stores.
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