Metronidazole is virtually completely absorbed with oral administration and should be given IV only if patient can take nothing by mouth. This is infrequent and unpredictable. Patients should be warned, and manufacturer recommends that alcohol be avoided. Category B. Fetotoxicity in animals. For trichomoniasis, CDC recommends 2 g x 1 after first trimester.
Alternative agents are available for most other conditions.
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