If amoxicillin-clavulanate fails to resolve acute otitis media, which antibiotic is commonly used next?

• A. Amoxicillin
• B. Ceftriaxone
• C. Azithromycin
• D. Doxycycline

Answer: (B)

When acute otitis media doesn’t respond to an initial oral antibiotic, the idea is to switch to a different medication with stronger, broader activity and reliable penetration into the middle ear. Ceftriaxone fits this need because it’s a third‑generation cephalosporin with good activity against the common ear pathogens, including strains that produce beta‑lactamases and strains resistant to amoxicillin. It reaches high concentrations quickly in serum and middle ear fluid, which helps rapidly clear infection. In children, it’s often given as a short course of injections (or a single dose, depending on the regimen), which improves adherence and ensures effective exposure when oral therapy has failed. While options like doxycycline or some macrolides are less reliable due to higher resistance in the pathogens that cause otitis media, and repeating the same oral agent isn’t typically effective, ceftriaxone is commonly chosen as the next step after failure of amoxicillin‑clavulanate.