The CDC recommends either:* Metronidazole* Erythromycin (orally or by injection) for 14 days (40 mg/kg per day with a maximum of 2 g/d), or* Procaine penicillin G given intramuscularly for 14 days (300,000 U/d for patients weighing <10 kg and 600,000 U/d for those weighing >10 kg).