A patient has been taking hydrocodone, and opioid analgesic for their

Correct Answer: B

Rationale: Naloxone is the antidote commonly used to reverse the effects of opioid toxicity, including hydrocodone. Naloxone works by competitively binding to opioid receptors in the brain, displacing the opioid molecules, and reversing their effects. It effectively antagonizes the respiratory depression, sedation, and analgesic effects caused by opioids like hydrocodone. Administering naloxone can quickly reverse these dangerous effects and help restore respiratory function in cases of opioid overdose or toxicity. Naloxone is commonly used in emergency settings and can be administered intravenously, intramuscularly, or intranasally. It is crucial for healthcare providers to be familiar with naloxone and its administration in managing opioid toxicity.

Correct Answer: B

Rationale: Drugs that block both alpha- and beta-adrenergic receptors are primarily used to treat cardiac-related conditions. Phentolamine, a nonselective alpha-adrenergic blocking agent, is used to treat extravasation of IV norepinephrine or dopamine and hypertension related to a pheochromocytoma. Alpha1-selective adrenergic blocking agents are used for treatment of hypertension and benign prostatic hyperplasia. The beta-adrenergic blocking agents are used to treat cardiovascular problems (hypertension, angina, migraine headaches) and to prevent reinfarction after myocardial infarction. Beta1-selective adrenergic blocking agents are used for treating hypertension, angina, and some cardiac arrhythmias. The nurse should understand the indications for these agents to ensure safe and effective administration.

Correct Answer: A

Rationale: Warfarin is an anticoagulant medication that works by inhibiting the production of certain clotting factors in the liver, specifically factors II, VII, IX, and X. By doing so, warfarin prevents the formation of new blood clots. It does not have the ability to dissolve existing blood clots, as that function is typically carried out by different types of medications known as thrombolytics. Warfarin is commonly prescribed to prevent and treat blood clots in conditions such as atrial fibrillation, deep vein thrombosis, and pulmonary embolism.

Correct Answer: D

Rationale: Nesiritide is a recombinant form of human B-type natriuretic peptide (BNP) that is used for the treatment of acutely decompensated heart failure (HF). It is specifically indicated for patients with acute decompensated HF who have dyspnea at rest. Nesiritide works by promoting vasodilation and natriuresis, which helps alleviate symptoms of acute decompensated HF such as dyspnea and edema. Therefore, the patient with acutely decompensated HF who has dyspnea at rest is the best candidate to receive nesiritide therapy to help improve their symptoms and hemodynamic status.

Correct Answer: A

Rationale: Mefloquine is an antimalarial drug that can cause hepatotoxicity, so liver enzyme tests are often ordered to monitor for liver damage. Blood glucose, sputum culture, and white blood cell count are not directly related to mefloquine use.