Correct Answer: A

Rationale: The healthcare professional should instruct the client to report dyspnea since it can indicate pulmonary toxicity, a severe adverse effect associated with gemcitabine therapy. Monitoring and reporting dyspnea promptly can help in early detection and management of potential serious complications. Constipation, tinnitus, and dry mouth are not typically associated with gemcitabine therapy and are not urgent findings requiring immediate reporting.

Correct Answer: C

Rationale: Muscle rigidity and a sudden rise in temperature are indicative of malignant hyperthermia, a potential complication of succinylcholine. Dantrolene is the drug of choice to treat malignant hyperthermia as it acts on skeletal muscles to reduce metabolic activity and counteract the symptoms. Neostigmine (Choice A) is used to reverse the effects of non-depolarizing neuromuscular blocking agents, not for malignant hyperthermia. Naloxone (Choice B) is an opioid antagonist used for opioid overdose. Vecuronium (Choice D) is a non-depolarizing neuromuscular blocking agent and is not the appropriate medication for malignant hyperthermia.

Correct Answer: A

Rationale: The correct answer is urinary retention. Opioid agonists like morphine can suppress the awareness of bladder fullness, leading to urinary retention. This complication can result in significant discomfort and potential urinary tract issues if not promptly addressed. Tachypnea (increased respiratory rate) is a common side effect of opioids but is not a specific complication related to urinary retention. Hypertension is not typically associated with opioid agonists and is more commonly seen with opioid antagonists. An irritating cough is not a known complication of opioid agonists and is not directly related to the effect opioids have on the urinary system.

Correct Answer: D

Rationale: The nurse should advise the client to limit aerobic activity in hot weather to prevent sodium/water depletion, which can increase the risk for Lithium toxicity. Excessive sweating and fluid loss can lead to dehydration and changes in lithium levels, potentially resulting in toxicity. Choices A, B, and C are incorrect. Avoiding acetaminophen for headaches is not directly related to Lithium toxicity. Restricting sodium intake and decreasing fluid intake can lead to increased lithium levels and toxicity, so these are not recommended actions.

Correct Answer: B

Rationale: The correct answer is B: Neurotoxicity. Vincristine is known to cause neurotoxicity as an adverse effect due to its impact on the nervous system. Monitoring for neurotoxicity is crucial to detect any signs early. Choices A, C, and D are incorrect. Hyperkalemia is not a typical finding associated with vincristine. Neutropenia is a common side effect of chemotherapy but is not directly related to vincristine. Bradycardia is not a common adverse effect of vincristine.