A nurse is caring for a patient with acne who has been prescribed tetracycline. The patient states that they drink a glass of milk every morning with breakfast. What is the nurse's best response?
"Milk helps the medication absorb more quickly."
"You should avoid milk and dairy products when taking tetracycline, as they reduce its effectiveness."
"It is safe to take milk with tetracycline, as long as you increase your water intake."
"It is fine to drink milk if taken at least 1 hour before or 2 hours after."
The Correct Answer is B
A. Milk does not enhance the absorption of tetracycline; rather, it contains calcium, which can bind to the antibiotic and reduce its absorption.
B. Avoiding milk and dairy products while taking tetracycline is essential as they reduce the medication's effectiveness by forming insoluble complexes with the drug.
C. Taking milk with tetracycline is not safe due to the risk of decreased absorption; simply increasing water intake does not negate this interaction.
D. While spacing the intake of milk and tetracycline might seem beneficial, it is best to avoid dairy entirely during the treatment to ensure maximum efficacy of the medication.
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Correct Answer is B
Explanation
A. Performing a blood sugar analysis is important, but in the case of sudden symptoms such as weakness, shakiness, and dizziness, it is crucial to act quickly to address the potential hypoglycemia without delay.
B. Having the client drink a 4-ounce glass of orange juice is the most appropriate initial response as it provides a quick source of glucose to alleviate symptoms of hypoglycemia, which is a common concern in clients with type 1 diabetes experiencing these symptoms.
C. Administering 1 ampule of 50% dextrose intravenously is an effective treatment for hypoglycemia but is typically reserved for severe cases where the patient is unable to consume oral glucose or is unconscious.
D. Administering 10 units of regular insulin subcutaneously would exacerbate the problem by lowering blood sugar further and is contraindicated in a patient experiencing hypoglycemic symptoms.
Correct Answer is D
Explanation
A. While historical context is useful, the development of antimicrobials primarily began in the early 20th century, notably with penicillin discovered by Alexander Fleming in 1928.
B. This statement is incorrect; fluoroquinolones primarily inhibit bacterial DNA synthesis rather than directly affecting the cell wall.
C. Selective toxicity is a principle of antimicrobial action but does not directly explain how a specific antimicrobial works therapeutically.
D. Penicillin specifically interferes with the synthesis of the bacterial cell wall, leading to cell lysis and death of the bacteria, which is a fundamental mechanism of action for this antibiotic.