Which of the following is an appropriate NSAID to use with lithium?

Sulindac is considered an appropriate NSAID to use with lithium because it does not significantly increase lithium levels in the bloodstream. This is important for patients who are on lithium therapy, as increased lithium levels can lead to toxicity. Sulindac's unique metabolism results in less interaction with lithium compared to other NSAIDs.

Ibuprofen, naproxen, and aspirin are known to potentially increase lithium levels due to their effects on renal function and sodium balance, which can lead to elevated risks of lithium toxicity. Therefore, selecting sulindac helps to manage pain or inflammation without compromising the safety and efficacy of the lithium treatment.