"According to the IDSA guidelines, beta-lactam agents (eg, amoxicillin-clavulanate, cefdinir, cefaclor, cefpodoxime-proxetil) in 3–7-day regimens are appropriate second-line choices when other recommended agents cannot be used. The IDSA advises against using amoxicillin or ampicillin for empiric treatment, because these agents have relatively poor efficacy and high rates of resistance."