A client asks the nurse if it is safe to take a glucosamine supplement. The nurse should assess for which of the following potential contraindications?

A. Shellfish allergy: Glucosamine supplements are often derived from shellfish. Clients with a shellfish allergy may experience an allergic reaction if they take glucosamine, making this an important contraindication to assess before recommending the supplement. B. History of smoking: Smoking does not directly contraindicate glucosamine use. While smoking has other health risks, it does not increase the risk of adverse effects from this supplement. C. Cardiac dysrhythmia: Glucosamine is not known to cause cardiac dysrhythmias, and a history of dysrhythmias is generally not a contraindication. Standard monitoring is sufficient. D. Family history of malignant hyperthermia: Malignant hyperthermia is triggered by certain anesthetic agents, not dietary supplements like glucosamine. This family history does not affect the safety of glucosamine intake.