Final answer:
A nurse should identify that a client starting a new prescription for lithium should discontinue Ibuprofen due to potential interaction.
Step-by-step explanation:
When collecting a medication history from a client who is starting a new prescription for lithium, the nurse should identify that the client should discontinue Ibuprofen (Choice A).
Lithium is a mood stabilizer commonly used to treat bipolar disorder. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that can increase the concentration of lithium in the blood, potentially leading to lithium toxicity. Therefore, it is important for the client to discontinue the use of Ibuprofen while taking lithium.