Correct Answer: C

Rationale: It is crucial for patients undergoing external beam radiation therapy to avoid exposing the treated area to sunlight as it can lead to further skin damage. Heat sources like heating pads should be avoided to prevent potential burns. Alcohol-based lotions can irritate the skin, so they should not be used. Washing the treated area with lukewarm water and mild soap is recommended to maintain skin integrity and prevent irritation.

Correct Answer: C

Rationale: The correct instruction for a client learning to self-administer insulin is to rotate injection sites within the same region. This practice helps prevent lipodystrophy, which is a condition characterized by fat tissue changes due to repeated injections in the same spot, and also ensures consistent absorption of insulin throughout the body.

Correct Answer: C

Rationale: Patients prescribed thiazide diuretics should monitor their weight daily to detect significant changes indicating fluid imbalance. This monitoring helps in early detection of any issues. Additionally, patients need to be cautious about potential hypokalemia and ensure they maintain adequate hydration levels to prevent complications.

Correct Answer: B

Rationale: The correct instruction for a client with myasthenia gravis prescribed pyridostigmine (Mestinon) is to take the medication 30 minutes before meals. This timing is crucial as it helps improve muscle strength for eating and swallowing. By taking the medication before meals, the client can experience enhanced muscle function during mealtime, which is especially important for managing the symptoms of myasthenia gravis.

Correct Answer: A

Rationale: The correct instruction for a patient prescribed hydroxychloroquine, especially in the context of systemic lupus erythematosus (SLE), is to report any vision changes immediately. Hydroxychloroquine can potentially cause retinal damage, so prompt reporting and ophthalmologic evaluation are essential in preventing irreversible eye complications.