A nurse is monitoring a client's response to receiving glipizide instead of guaifenesin. Which of the following actions should the nurse take?

A. Lower the head of the client's bed. There is no need to lower the client’s head of the bed in response to receiving glipizide instead of guaifenesin. Glipizide is an oral antidiabetic medication used to lower blood glucose, while guaifenesin is an expectorant for respiratory conditions. Lowering the head of the bed does not address the potential effects of receiving the wrong medication. B. Check the client for urinary retention. Glipizide does not cause urinary retention. Instead, it stimulates insulin release to lower blood sugar. If hypoglycemia occurs due to an unintentional dose of glipizide, symptoms such as sweating, dizziness, confusion, or tremors are more concerning than bladder dysfunction. C. Offer the client a carbohydrate snack. Since glipizide lowers blood glucose levels, administering it instead of guaifenesin could result in hypoglycemia, particularly in a client who does not have diabetes. The nurse should monitor for signs of low blood sugar, such as shakiness, confusion, diaphoresis, and dizziness, and provide a fast-acting carbohydrate (e.g., juice, crackers, or glucose tablets) if symptoms develop. D. Test the client’s deep-tendon reflexes. Glipizide does not affect neuromuscular function or deep-tendon reflexes. While severe hypoglycemia can cause altered mental status or seizures, routine reflex testing is not necessary for monitoring the effects of an incorrect glipizide administration.