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Use of dosages of intravenous metronidazole higher than those recommended has been reported. These include the use of 27 mg/kg three times a day for 20 days, and the use of 75 mg/kg as a single loading dose followed by 7.5 mg/kg maintenance doses. No adverse reactions were reported in either of the two cases.
Single oral dose of metronidazole, up to 15 g, have been reported in suicide attempts and accidental overdoses. Symptoms reported included nausea, vomiting and ataxia.
Oral metronidazole has been studied as a radiation sensitizer in the treatment of malignant tumors. Neurotoxic effects, including seizures and peripheral neuropathy, have been reported after 5 to 7 days of doses of 6 to 10.4 g every other day.
Treatment: There is no specific antidote for overdose; therefore, management of the patient should consist of symptomatic and supportive therapy.
Metronidazole Injection, USP RTU is contraindicated in patients with a prior history of hypersensitivity to metronidazole or other nitroimidazole derivatives.
Last reviewed on RxList: 6/7/2012
This monograph has been modified to include the generic and brand name in many instances.
Additional Flagyl Injection Information
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