Question explored with the scientific record
amoxicillin
Amoxicillin is a real antibiotic with real benefits for bacterial ear and sinus infections, and real harms that the trials here mostly measured as stomach upset.
For a child with acute otitis media, amoxicillin-clavulanate (amoxicillin plus a compound that blocks bacterial enzymes) beat cefaclor and penicillin in a systematic review [8]. In one trial, 10 days cured more children than 5 days: 16% failure versus 34% [7]. In another, 90 mg/kg/day cleared more penicillin-resistant pneumococcus than 45 mg/kg/day [6]. Clinical success reached 89% of 295 children by days 12 to 15 [6]. That is the honest case for it.
The harms are not trivial. Diarrhea and rash are the common ones: 6 of 32 patients in a 1982 skin-infection trial [1], and 39% of children on amoxicillin-clavulanate had a drug-related adverse event versus 18% on cefuroxime [5]. A 2018 French pharmacovigilance review documented a rising number of amoxicillin-induced crystal kidney injury cases, including ICU admissions and dialysis [3]. A 2024 case report describes severe liver cholestasis after amoxicillin-clavulanate [4]. And resistance is real: in a 2024 pediatric urinary study, 42% of E. coli were resistant to amoxicillin and 50% of Klebsiella [2].
| Finding | Amoxicillin-clavulanate | Comparator |
|---|---|---|
| AOM failure, 5 vs 10 days | 34% (5 days) | 16% (10 days) [7] |
| Drug-related adverse events | 39% | 18% (cefuroxime) [5] |
| H. influenzae cure | 91.6% | 73.7% (azithromycin) [8] |
| E. coli resistance (UTI) | 42% | - [2] |
The funding picture is thin here: one trial's drug was supplied by Beecham Research Laboratories [1], and most records do not state funding at all. The evidence is mostly short-term trials in children with ear infections; there is no long-term safety data in these records, and no trial comparing treated to genuinely untreated children with hard outcomes.
My call: for a confirmed bacterial ear or sinus infection in a child, amoxicillin is a reasonable first choice, but only when the infection is actually bacterial, and the stomach and kidney risks are real. Confidence: moderate.
Sources used 8
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Further Experience with Augmentin in the Treatment of Skin Infections
A clinical evaluation of Augmentin (amoxicillin-clavulanic acid) in 32 patients with various skin infections, showing high clinical/microbiological cure rates, acceptable tolerability, and eradication of common pathogens, suggesting Augmentin is effective for mixed penicillinase…
DOI: 10.1177/00369330820270s108 -
Pathogenic microorganisms and antimicrobial resistance patterns in the pediatric age group with urinary system infections
In 191 pediatric UTI patients, E. coli was the predominant uropathogen; ampicillin and amoxicillin resistance were common, while amikacin and nitrofurantoin had highest sensitivity.
DOI: 10.59213/tp.2024.120 -
Dramatic Increase of Amoxicillin-Induced Crystal Nephropathy Found in a Cohort Study of French Pharmacovigilance Centers
This study investigates the dramatic increase in amoxicillin-induced crystal nephropathy (AICN) cases reported in Paris' regional centers of pharmacovigilance from 1985 to 2016, highlighting alarming trends in incidence and patient outcomes.
DOI: 10.1128/aac.01630-17 -
Severe hepatic cholestasis after treatment with amoxicillin/clavulanic acid
This case report describes an 80-year-old woman with amoxicillin-clavulanate-induced liver injury, a rare adverse reaction typically presenting as cholangiopathy with cholestasis.
DOI: 10.61409/v02240094 -
Comparison of cefuroxime axetil and amoxicillin-clavulanate suspensions in treatment of acute otitis media with effusion in children
In children with acute otitis media with effusion, cefuroxime axetil produced clinical outcomes equivalent to amoxicillin-clavulanate and fewer drug-related adverse events.
DOI: 10.1128/aac.38.2.315 -
Eradication of Streptococcus pneumoniae in the Nasopharyngeal Flora of Children with Acute Otitis Media after Amoxicillin-Clavulanate Therapy
In acute otitis media, 90 mg/kg/day amoxicillin-clavulanate reduced penicillin-resistant Streptococcus pneumoniae isolates more than 45 mg/kg/day (8 to 1 vs 6 to 5; P=0.0256), with no differences for other organisms.
DOI: 10.1128/aac.48.4.1419-1421.2004 -
Acute Otitis Media — The Long and the Short of It
This study reviews the management of acute otitis media in children, emphasizing the effectiveness of a 10-day course of amoxicillin-clavulanate compared to a 5-day course, highlighting the implications for clinical practice and antibiotic resistance.
DOI: 10.1056/NEJMe1614712 -
Efficacy of antimicrobials or placebo compared to amoxicillin-clavulanate in children with acute otitis media: a systematic review
In children with acute otitis media, amoxicillin-clavulanate was reported superior to other common antimicrobials and had higher H. influenzae clinical success than azithromycin, but recurrence showed no difference and placebo evidence was mixed; high heterogeneity limited meta-…
DOI: 10.24953/turkjped.2022.893