Correct Answer: C

Rationale: The correct answer is C. Propranolol is a beta-adrenergic antagonist that helps decrease heart rate and control tremors in individuals with Graves' disease. It does not increase blood flow to the thyroid gland (choice A), prevent excess glucose in the blood (choice B), or directly decrease thyroid hormone levels in the body (choice D).

Correct Answer: D

Rationale: When a client is receiving cyclophosphamide, the nurse should monitor for hemorrhagic cystitis, a severe adverse effect caused by bladder irritation. It is essential to watch for signs such as hematuria, dysuria, and urinary frequency, and promptly intervene to prevent further complications.

Correct Answer: B

Rationale: The correct administration of Nitroglycerin sublingual tablets involves taking one tablet at the onset of chest pain and repeating every 5 minutes for up to three doses. If the pain persists after three doses, emergency medical services should be contacted for further evaluation and management.

Correct Answer: B

Rationale: After more than 5 days of use, nasal sympathomimetic medications like phenylephrine can lead to rebound nasal congestion. This occurs as a result of prolonged vasoconstriction of nasal blood vessels, causing worsening nasal congestion.

Correct Answer: A

Rationale: The healthcare professional should administer IV Hydromorphone slowly over 5 minutes to reduce the risk of hypotension and respiratory depression. Rapid administration can lead to adverse effects due to its potency.