Correct treatment of a patient with ANUG is:

  # Correct treatment of a patient with ANUG is:

A. Amoxicillin 500 mg three times daily for 5 days and 0.2 % chlorhexidine mouthwashes twice daily 

B. Erythromycin 250 mg four times daily for 5 days and 0.2 % chlorhexidine mouthwashes twice daily 

C. Scaling and oral hygiene instruction 

D. Metronidazole 400 mg three times daily for 5 days and hydrogen peroxide mouthwash twice daily  

The correct answer is D. Metronidazole 400 mg three times daily for 5 days and hydrogen peroxide mouthwash twice daily. 

ANUG is a very painful condition. The most efficacious mouthwash is hydrogen peroxide, and the bacterial component is treated with metronidazole. Amoxicillin and erythromycin would be ineffective in the treatment of this condition.