Yes, amoxicillin 1g three times daily for 10 days can be safely given to a pregnant woman with acute otitis media.
Amoxicillin is classified as FDA Pregnancy Category B and is considered safe throughout all trimesters of pregnancy 1. The FDA drug label explicitly states that reproduction studies in mice and rats at doses up to 2000 mg/kg showed no evidence of harm to the fetus, though it notes that "amoxicillin should be used during pregnancy only if clearly needed" due to lack of adequate well-controlled studies in pregnant women 1.
Safety Profile in Pregnancy
Multiple international respiratory guidelines consistently classify amoxicillin as compatible for use during pregnancy:
- The ERS/TSANZ 2020 guidelines classify oral amoxicillin as TGA Category A and FDA Category B, indicating it is "compatible" for use throughout pregnancy (Pre/T1, T2/T3, and during breastfeeding) 2
- The 2016 rhinosinusitis pregnancy guidelines recommend that penicillins and cephalosporins are the safest antibiotic classes during pregnancy, explicitly stating they can be given for acute bacterial infections 3
The only notable caveat is that amoxicillin-clavulanate should be avoided in women at risk of preterm delivery due to a very low risk of necrotizing enterocolitis in the fetus 2. However, plain amoxicillin does not carry this restriction.
Dosing Considerations
The proposed regimen of 1g TID (3g total daily) is appropriate:
- Standard adult dosing for acute otitis media ranges from 750-1750 mg/day in divided doses every 8-12 hours 1
- High-dose amoxicillin (80-90 mg/kg/day, which translates to approximately 4-6g/day for a 60-70kg adult) is recommended in guidelines for resistant organisms 4, 5
- Your proposed 3g/day dose falls within the safe and effective range
Treatment Duration
The 10-day duration is standard and appropriate:
- AAP/AAFP 2004 guidelines support 10-day treatment courses for acute otitis media 4
- French guidelines recommend 10 days for pneumococcal infections 6
- Research demonstrates good efficacy with 10-day courses 7, 8
Clinical Efficacy
Evidence supports amoxicillin's effectiveness for acute otitis media even in pregnancy-aged adults:
- Treatment failure rates are low (5.4%) with amoxicillin monotherapy 8
- Clinical improvement occurs in 74% by day 5 and resolution in 47% 8
- High-dose amoxicillin achieves 82% bacteriologic eradication 7
Important Caveats
Monitor for treatment failure at 48-72 hours 4, 5. If the patient fails to improve:
- Consider switching to amoxicillin-clavulanate (if not at risk for preterm delivery)
- Consider alternative diagnoses
- Reassess for complications
Counsel about potential adverse effects including diarrhea (25% incidence) and the theoretical risk of reduced oral contraceptive efficacy 1.
Penicillins are excreted in breast milk, so if the patient is breastfeeding, caution should be exercised though amoxicillin is generally considered compatible with breastfeeding 1.