amoxicillin
amoxicillin
Overview
Amoxicillin is a widely used β-lactam antibiotic in the penicillin class. It acts by inhibiting bacterial cell-wall synthesis through binding to penicillin-binding proteins, thereby impairing peptidoglycan cross-linking and leading to bacterial growth inhibition and cell death in susceptible organisms. Clinically, it is used for a range of bacterial infections, and its role in therapy is often considered alongside related agents such as amoxicillin-clavulanate, cefiderocol, and ceftazidime-avibactam when resistance patterns or infection severity influence antibiotic selection.
Beyond its established antimicrobial use, amoxicillin has also been studied as a biologically active exposure in developmental and environmental contexts. Recent work has examined its effects on dental enamel formation, where it was considered alongside fluoride, calcium, and vitamin D in a rat incisor model. Other studies have used amoxicillin as a model compound in analytical chemistry and environmental monitoring, reflecting its relevance as both a pharmaceutical and a contaminant of interest.
Focus of Latest Publications
Recent publications on amoxicillin have focused on its role in clinical therapy, its effects in combination settings, and its use as a reference compound in analytical and environmental studies. In infected diabetic foot ulcers, amoxicillin/clavulanate was evaluated alongside ceftazidime in the DFIATIM trial to assess whether bolus or continuous administration better achieved sufficient serum and peripheral tissue concentrations for bactericidal activity. In pediatric acute otitis media, amoxicillin remained the most frequently prescribed first-line antimicrobial in two Finnish hospitals, with more than 80% of children receiving it and most treated with a short 5-day course. A separate adult acute sinusitis publication highlighted ongoing uncertainty about whether amoxicillin or amoxicillin-clavulanate should be preferred as first-line treatment for uncomplicated disease.
Beyond therapeutic use, amoxicillin was examined for potential biological effects during enamel development. In a rat incisor model, combined exposure to fluoride and amoxicillin was associated with disorganized enamel prisms, increased ameloblast apoptosis marked by caspase-3 and TUNEL labeling, reduced KLK4 within ameloblasts, and altered abundance of enamel matrix proteins including AMBN, AMTN, and ODAM. The authors reported that vitamin D and calcium supplementation did not significantly reverse these changes under the conditions tested, suggesting that amoxicillin may contribute to disrupted amelogenesis when combined with fluoride exposure.
Amoxicillin was also used as a model analyte in a graphene-based electrochemical sensing platform for water contaminants. Using laser-induced graphene and screen-printed graphene electrodes with hydrogen peroxide-assisted redox mediation, the system detected amoxicillin at sub-ppb levels and showed strong agreement with HPLC-MS. Mass spectrometry identified peroxide-driven transformation products, including hydroxylated derivatives and β-lactam ring-opened intermediates, consistent with reactive oxygen species chemistry. The same platform responded to other oxidizable contaminants such as Diclofenac and ibuprofen, supporting its broader use for screening cumulative oxidizable organic burden in wastewater.
No recent publication in this set directly studied amoxicillin in relation to Pseudomonas aeruginosa resistance evolution, but the broader antimicrobial literature emphasized how treatment pressure can drive β-lactam resistance and within-patient adaptation in this pathogen.