The nurse is admitting a male client who takes lithium carbonate twice a day. Which information should the nurse report to the healthcare provider immediately?

Choice A rationale: A five-pound weight gain in a client taking lithium carbonate is significant. however, the timeframe of the weightgain is to be known. Choice B rationale: Nausea and vomiting are known side effects of lithium that should be reported as they can cause electrolyte imbalance. Choice C rationale: Short-term memory loss is a potential side effect of lithium, but it may not require immediate reporting unless it significantly affects the client's daily functioning or is associated with other concerning symptoms. Choice D rationale: A depressed affect is a symptom that should be addressed as part of the client's ongoing psychiatric care, but it may not warrant immediate reporting unless it is severe and requires a change in the treatment plan. The priority in this case is the potential lithium toxicity indicated by the weight gain.