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As with any overdose, supportive therapy should be administered as indicated. Overdoses of a related drug, amantadine, have been reported with adverse reactions consisting of agitation, hallucinations, cardiac arrhythmia and death. The administration of intravenous physostigmine (a cholinergic agent) at doses of 1 to 2 mg in adults (Ref. 7) and 0.5 mg in children (Ref. 8) repeated as needed as long as the dose did not exceed 2 mg/hour has been reported anecdotally to be beneficial in patients with central nervous system effects from overdoses of amantadine.
Flumadine (rimantadine) is contraindicated in patients with known hypersensitivity to drugs of the adamantane class, including rimantadine and amantadine.
7. Casey DE. N Engl J Med. 1978;298(9):516.
Last reviewed on RxList: 4/26/2010
This monograph has been modified to include the generic and brand name in many instances.
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