Periodontics · single question
Most appropriate antibiotic for treating necrotizing ulcerative gingivitis (NUG)?
Show answer and explanation
Correct answer: A. Metronidazole
METRONIDAZOLE 250-500mg TID x 7 days = antibiotic of choice for NUG. NUG caused predominantly by anaerobic spirochetes (Treponema), Fusobacterium, Prevotella — all highly susceptible to metronidazole's free radical generation in anaerobic environments. Must combine with mechanical debridement.