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For acute dental and gum infections, examples of suitable antibiotics include (adult doses) for 5 days: amoxicillin 500mg 8-hourly orally, or, metronidazole 400mg 8-hourly orally, or, if penicillin allergic: clarithromycin 500mg 12-hourly orally
Dentists often prescribe antibiotics to treat an acute gum infection called an abscess. A periodontist also may use antibiotics for some cases of gum disease that are hard to treat. They include: Necrotizing ulcerative gingivitis (NUG), a rare form of periodontal disease that becomes severe very quickly.