The Client Has Been Ordered to Be Treated with Allopurinol

The client has been ordered to be treated with allopurinol. He complains to the nurse that he has noted changes in his vision. What is the most appropriate nursing intervention?

A) Explain to the client that this is an expected response to the drug.
B) Call the physician; this is a life-threatening response to the drug.
C) Explain to the client that this is a normal side effect of the drug.
D) Call the physician; this is an adverse reaction to the drug.