In the amoxicillin regimen described for acute otitis media, how often is the dose given per day?

In the amoxicillin regimen described for acute otitis media, how often is the dose given per day?

• A. Three times daily
• B. Twice daily
• C. Four times daily
• D. Once daily

Answer: (A)

Time above MIC drives the effectiveness of amoxicillin, a beta-lactam whose killing is time-dependent. To treat acute otitis media effectively, you want drug levels to stay above the bacteria’s MIC for as long as possible within each day. Giving the daily dose in three portions spread through the day helps keep concentrations above the MIC for longer periods than a twice-daily schedule, improving bacterial kill and reducing the chance of relapse. Four times daily would reward only marginal gains and increase dosing burden, while once daily would leave longer troughs below MIC. So three daily doses optimize continuous exposure and efficacy in this regimen.

Time above MIC drives the effectiveness of amoxicillin, a beta-lactam whose killing is time-dependent. To treat acute otitis media effectively, you want drug levels to stay above the bacteria’s MIC for as long as possible within each day. Giving the daily dose in three portions spread through the day helps keep concentrations above the MIC for longer periods than a twice-daily schedule, improving bacterial kill and reducing the chance of relapse. Four times daily would reward only marginal gains and increase dosing burden, while once daily would leave longer troughs below MIC. So three daily doses optimize continuous exposure and efficacy in this regimen.