Tetracycline needs to be given on an empty stomach because it chelates with:
- A. Calcium
- B. Magnesium
- C. Iron
- D. All of the above
Correct Answer: D
Rationale: Tetracycline forms insoluble complexes with divalent and trivalent cations (calcium, magnesium, iron), reducing absorption when taken with food containing these elements.
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The anthelminthic whose dose is 400 gms stat for most worm infestation:
- A. Piperazine
- B. Mebendazole
- C. Albendazole
- D. Levamisole
Correct Answer: C
Rationale: Albendazole is commonly prescribed as a single 400 mg dose (stat) for most intestinal worm infestations, such as ascariasis and hookworm, due to its broad-spectrum efficacy.
Combined alpha-beta antagonists are used to reduce the progression of heart failure because they:
- A. Vasodilate the peripheral vasculature
- B. Decrease cardiac output
- C. Increase renal vascular resistance
- D. Reduce atherosclerosis secondary to elevated serum lipoproteins
Correct Answer: A
Rationale: Alpha-beta blockers (e.g., carvedilol) vasodilate, reducing afterload in heart failure.
A nurse is caring for a patient who is supposed to receive two drugs at the same time. What is the nurse's priority action?
- A. Wash her hands before handling the medications.
- B. Consult a drug guide for compatibility.
- C. Question the patient concerning drug allergies.
- D. Identify the patient by checking the armband and asking the patient to state his name.
Correct Answer: B
Rationale: A nurse should first consult a drug guide for compatibility when two or more drugs are being given at the same time. After compatibility is determined the medication can be administered. The nurse will perform hand hygiene, check for patient allergies, and ensure the right patient receives the medication by using two identifiers.
When taking a medication history on a patient why should the nurse ask about the use of alternative therapies?
- A. Patients who use new drugs are usually not compliant with medical regimens.
- B. Many drug-alternative therapy interactions can cause serious problems and should be avoided.
- C. Natural products may be more effective and the drug may not be needed.
- D. The cost of the drug and the alternative therapy may be too great for the patient to handle.
Correct Answer: B
Rationale: Alternative therapies can interact with prescribed drugs, potentially causing adverse effects, making this a critical assessment point.
Prior to prescribing metformin, the provider should:
- A. Draw a serum creatinine to assess renal function
- B. Try the patient on insulin
- C. Tell the patient to increase iodine intake
- D. Have the patient stop taking any sulfonylurea to avoid dangerous drug interactions
Correct Answer: A
Rationale: Metformin requires renal function assessment (creatinine) due to lactic acidosis risk; insulin isn't a prerequisite.