Latex hypersensitivity is now recognized as a potential cause of intraoperative anaphylaxis (1,2). Patients at risk for latex allergy include children with myelodysplasia or congenital urologic anomalies, sensitized health care personnel, and rubber factory workers (3-5). Latex-sensitive patients can be anesthetized safely if precautions are taken to remove all latex-based products from contact with the patient. In this report we describe a patient with known latex sensitivity who developed an allergic reaction after the administration of a drug from a vial with a latex stopper.