In rare cases, allergic reactions (skin rash) and side effects, in particular abdominal pain, headache, vaginal irritation (burning, itching) can be observed.
Local reactions: miconazole nitrate can cause vaginal irritation (burning, itching), as with intravaginal application of any other antifungal agents based on imidazole derivatives (2-6%). If irritation is severe, treatment should be discontinued.
Systemic side effects occur very rarely, because with vaginal absorption the level of metronidazole in the plasma is very low. Side effects associated with systemic absorption of metronidazole include: allergic reactions (rarely), leukopenia, ataxia, changes in the psyche (anxiety, lability of mood), convulsions, rarely: diarrhea, constipation, dizziness, headache, loss of appetite, nausea, vomiting, pain or cramps in the abdomen, a change in taste (rarely), dry mouth, metallic or unpleasant aftertaste, increased fatigue.