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Signs of metyrosine overdosage include those central nervous system effects observed in some patients even at low dosages.
At doses exceeding 2000 mg/day, some degree of sedation or feeling of fatigue may persist. Doses of 2000-4000 mg/day can result in anxiety or agitated depression, neuromuscular effects (including fine tremor of the hands, gross tremor of the trunk, tightening of the jaw with trismus), diarrhea, and decreased salivation with dry mouth.
Reduction of drug dose or cessation of treatment results in the disappearance of these symptoms.
The acute toxicity of metyrosine was 442 mg/kg and 752 mg/kg in the female mouse and rat respectively.
DEMSER (metyrosine) is contraindicated in persons known to be hypersensitive to this compound.
Last reviewed on RxList: 11/20/2008
This monograph has been modified to include the generic and brand name in many instances.
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