A nurse is monitoring a client who is receiving a blood transfusion. The nurse identifies that the client has urticaria and is wheezing. Which of the following types of transfusion reactions should the nurse suspect?

A. "I can prevent nausea if I take the medication on an empty stomach." This is incorrect. Taking ferrous sulfate on an empty stomach may increase the risk of gastrointestinal upset, including nausea. It is typically recommended to take it with food to reduce these side effects, although it may be less effective if taken with certain foods or beverages.

B. "I can prevent constipation if I drink more milk while taking this medication." This is incorrect. Milk can actually worsen constipation, and clients taking ferrous sulfate should focus on increasing fiber intake and drinking plenty of fluids to prevent constipation.

C. "I will report black stools to my doctor." This is correct. Black stools are a common side effect of iron supplementation, but it is essential for the client to report it to the doctor if they are concerned, as it could also indicate gastrointestinal bleeding in some cases.

D. "I will mix the medication with a full glass of water." While taking the medication with a full glass of water is appropriate, it is not the most significant instruction regarding the use of the medication. Therefore, while the answer isn't wrong, it doesn't indicate the client's understanding of the most important aspects, such as monitoring for side effects like black stools.

A. Using the telephone numbers of the clients is correct. According to The Joint Commission's National Patient Safety Goals, at least two unique identifiers, such as date of birth and telephone number, should be used to verify client identity before administering medications to prevent errors.

B. Using the room numbers of the clients is incorrect. Room numbers can change, and relying on them increases the risk of medication errors if a client is moved or misidentified.

C. Using the diagnoses of the clients is incorrect. A diagnosis is not a unique identifier, as multiple clients in a unit may have the same or similar conditions, leading to potential confusion.

D. Using the names of the clients' nearest relatives is incorrect. Family members’ names do not provide a direct, unique way to verify the client’s identity, making them unreliable for medication administration.