This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Not indicated for anaerobic colitis treatment: 
Select and explain. 
A. Metronidazole, B. Aminoglycoside, C. Amikacin, D. Piperacillin-tazobactam
B: Aminoglycoside
Answer: B: Aminoglycoside 
Explanation: Ans. (B) AminoglycosideTreatment of anaerobic intra-abdominal infections:Oral:Moxifloxacin 400 mg every 24 hourIV:Moderate to moderately severe infectionsEapenem 1 g every 24 hours Ceftriaxone 1 g every 24 hours (or ciprofloxacin 400 mg every 12 hours, if penicillin allergic) plus metronidazole 500 mg every 8 hours orTigecycline 100 mg once followed by 50 mg every 12 hours orMoxifloxacin 400 mg every 24 hoursSevere infections:imipenem,0.5 g every 6-8 hours; meropenem 1g every 8 hours; doripenem 0.5 g every 1 hour; piperacillin/tazobactam 4.5gevery8hours