A nurse is providing teaching to a client who has rheumatoid arthritis and is starting to take hydroxychloroquine. Which of the following client statements indicates an understanding of the teaching?

The correct answer is C: "I will need to have regular eye exams while taking this medication." This statement indicates an understanding of the teaching because hydroxychloroquine can potentially cause eye-related side effects, such as retinopathy. Regular eye exams are essential to monitor for any signs of eye damage. Choice A is incorrect because crushing hydroxychloroquine can alter its effectiveness. Choice B is incorrect as abruptly discontinuing the medication can lead to a flare-up of rheumatoid arthritis symptoms. Choice D is incorrect because taking a double dose of hydroxychloroquine can increase the risk of side effects without providing any additional benefit.