A previously healthy 4-year-old with acute sinusitis should be treated with which therapy first-line?

A previously healthy 4-year-old with acute sinusitis should be treated with which therapy first-line?

• A. Amoxicillin
• B. Amoxicillin/clavulanate potassium
• C. Ceftriaxone
• D. Azithromycin

Answer: (A)

Treating uncomplicated acute bacterial sinusitis in a previously healthy child is started with high-dose amoxicillin because it effectively targets the most common pathogens in kids (Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis) while remaining well tolerated and narrow in spectrum. In a preschooler without comorbidities or recent antibiotic exposure, amoxicillin provides reliable coverage and minimizes unnecessary use of broader agents that can drive resistance. Amoxicillin is preferred here over broader or alternative choices because resistance risk is lower in this low-risk patient, and using a narrower antibiotic helps preserve broader-spectrum options for more complicated or resistant infections. If the child fails to improve within a couple of days, or if there are risk factors for resistant organisms (such as recent antibiotic use, daycare attendance, or more severe illness), the next step would be to switch to amoxicillin-clavulanate or consider other appropriate agents. Choices like azithromycin are generally avoided due to higher resistance and lower effectiveness, and a drug like ceftriaxone is reserved for severe cases or when oral therapy isn’t possible.

Treating uncomplicated acute bacterial sinusitis in a previously healthy child is started with high-dose amoxicillin because it effectively targets the most common pathogens in kids (Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis) while remaining well tolerated and narrow in spectrum. In a preschooler without comorbidities or recent antibiotic exposure, amoxicillin provides reliable coverage and minimizes unnecessary use of broader agents that can drive resistance.

Amoxicillin is preferred here over broader or alternative choices because resistance risk is lower in this low-risk patient, and using a narrower antibiotic helps preserve broader-spectrum options for more complicated or resistant infections. If the child fails to improve within a couple of days, or if there are risk factors for resistant organisms (such as recent antibiotic use, daycare attendance, or more severe illness), the next step would be to switch to amoxicillin-clavulanate or consider other appropriate agents. Choices like azithromycin are generally avoided due to higher resistance and lower effectiveness, and a drug like ceftriaxone is reserved for severe cases or when oral therapy isn’t possible.