Amoxicillin/clavulanate is a penicillin-class (β-lactam) antibiotic. Its labeling includes a contraindication in patients with a history of hypersensitivity to β-lactams (e.g., penicillins; often caution with cephalosporins due to cross-reactivity). Allergy to quinolones (B) is unrelated pharmacologically. Pregnancy or breastfeeding (C) is not an absolute contraindication (risk/benefit assessment is used). Hypertension (D) is not relevant. Therefore, beta-lactam hypersensitivity is the clear contraindication.
• Anti-infectives section of technician study guides: β-lactam structure, class allergies, and contraindications.
• Drug labeling standards: contraindication for penicillin hypersensitivity in amoxicillin-containing products.
• ISMP safety guidance: allergy screening for β-lactam antibiotics.
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