An international traveler diagnosed with malaria is admitted to the emergency department and is prescribed mefloquine hydrochloride. The nurse anticipates that which laboratory test will be ordered?

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.

Correct Answer: C

Rationale: Metoprolol, a beta-blocker, can cause bradycardia. The nurse must assess the patient’s heart rate before administration to ensure it is within a safe range (typically >60 beats/minute). Respirations (A), temperature (B), and oxygen saturation (D) are less critical for metoprolol 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: B

Rationale: Omeprazole belongs to the therapeutic class of antiulcer agents. It is a proton pump inhibitor that works by decreasing the amount of acid produced in the stomach. Omeprazole is commonly used to treat conditions such as gastroesophageal reflux disease (GERD), gastric ulcers, and duodenal ulcers. It helps reduce symptoms such as heartburn, acid reflux, and stomach pain by promoting healing of the stomach lining.

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.