Used for treatment of acne (Gel) and vaginitis (Gel, Ovules) Significant levels in breast milk are unlikely because of low content of Metronidazole in products for topical use (less than 1%) and low absorption by vaginal mucosa (Ovules: 25%, Gel: 56%). Through skin it is not absorbed at all. Like most medications for topical use, a poor absorption make it compatible with breastfeeding. Widely used for treatment of Giardia lamblia infections, even in small infants, without adverse effects reported. Metronidazole may produce a red discoloration of corporal fluids and bitter flavor of the milk with no harm effect on the child.