A nurse is caring for a client who has a sulfonamide allergy. Which of the following medications should the nurse identify as contraindicated?

A. Famotidine is an H2 receptor antagonist used to treat conditions like ulcers and gastroesophageal reflux disease (GERD). It does not contain sulfonamide and is generally safe for patients with sulfonamide allergies. B. Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) used for pain relief, fever reduction, and anti-inflammatory purposes. It does not contain sulfonamide and is not contraindicated for patients with sulfonamide allergies. C. Metronidazole is an antibiotic used to treat various infections, including those of the gastrointestinal tract and the reproductive system. It does not contain sulfonamide and is safe for patients with sulfonamide allergies. D. Glyburide is a sulfonylurea used to treat type 2 diabetes by increasing insulin production in the pancreas. It contains sulfonamide and can cause allergic reactions in patients with sulfonamide allergies, making it contraindicated.