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Article
March 1983

Naloxone Dosage-Reply

Author Affiliations

Department of Pharmacology
Department of Neurology University of Milan Milan, Italy

Arch Neurol. 1983;40(3):189. doi:10.1001/archneur.1983.04050030083020

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Abstract

In Reply.  —We have used naloxone hydrochloride experimentally in patients with parkinsonism treated with levodopa for a long period. The drug was given in a single IV injection over three to four minutes, once daily for three successive days. It exerts its effects on central neuronal mechanisms previously perturbed by pharmacologic manipulations, as in persons treated with narcotics or, as in our trial, with levodopa.In our experience, significant results were obtained only after administering relatively high doses of naloxone hydrochloride (8 mg), and we reported the side effects observed. In fact, naloxone administration at this dosage did not cause any side effects in normal subjects, as previously indicated by other authors,1 who also used higher dosages of the drug.

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