A nurse is admitting a client who has a new diagnosis of bipolar disorder and is scheduled to begin lithium therapy. When collecting a medical history from the client's adult daughter, which of the following statements is the priority to report to the provider?
a) "The client's sibling has a history of asthma."
b) "The client has been experiencing frequent mood swings."
c) "The client takes a calcium supplement daily."
d) "The client is allergic to penicillin."