A nurse is caring for a client who has been taking lithium mg PO daily. Which of the following client statements requires follow-up by the nurse?

"I will not take over-the-counter medicines without checking with my prescriber."

"I have been eating a lot of potato chips, pretzels, and salted nuts lately."

"I will get bloodwork drawn every 3 months."

"I will always drink at least six 12-ounce glasses of water a day."