Cross-reactions may occur in patients w/ history of allergic reaction to penicillins or any other β-lactam antibiotics. Consider alternative prophylactic antibiotic in patients at risk for infections w/ resistant strains eg, those w/ known previous MRSA infection or colonisation. Potential risk of corneal endothelial toxicity. Patients w/ severe risk of infection; complicated cataracts; severe thyroid disease; <2,000 corneal endothelial cells; patients having combined operations w/ cataract surgery. Paed population.