How should unopened vials of insulin be stored to ensure potency?
In the refrigerator until the expiration date.
At room temperature indefinitely.
Frozen for long-term storage.
in direct sunlight to maintain proper warmth.
The Correct Answer is A
A. In the refrigerator until the expiration date: Unopened insulin vials should be stored in the refrigerator (typically 36–46°F or 2–8°C) to maintain their potency until the manufacturer’s expiration date. Proper refrigeration preserves the insulin’s chemical stability and effectiveness.
B. At room temperature indefinitely: Insulin can only remain at room temperature for a limited period (usually 28 days after opening). Storing unopened vials at room temperature indefinitely can degrade the medication and reduce efficacy.
C. Frozen for long-term storage: Freezing insulin damages its molecular structure, causing it to lose potency. Insulin should never be frozen, as this can make it ineffective or unsafe for administration.
D. In direct sunlight to maintain proper warmth: Exposure to direct sunlight or heat accelerates insulin degradation, reducing potency and potentially altering its pharmacologic effect, making this an unsafe storage method.
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Related Questions
Correct Answer is D
Explanation
A. Right medication: The right medication focuses on ensuring the correct drug is selected and matched with the prescription. Confirming the patient’s meal schedule does not address whether the correct medication is being administered.
B. Right documentation: The right documentation involves accurately recording medication administration details after giving the drug. Meal timing relates to when the medication is given, not how it is recorded.
C. Right route: The right route ensures the medication is given via the correct pathway, such as oral or intravenous. Taking a medication with food affects timing and absorption, not the route of administration.
D. Right time: Confirming the patient’s meal schedule ensures the medication is given at the appropriate time in relation to food intake. This supports proper absorption, effectiveness, and reduction of adverse effects, making it a priority for the right time.
Correct Answer is C
Explanation
A. 1 mg = 100 mcg: One milligram equals 1,000 micrograms, not 100. Using 100 would underestimate the dose by tenfold, potentially leading to medication errors.
B. 1 mcg = 1,000 mg: One microgram is much smaller than a milligram; 1 mcg equals 0.001 mg. This option greatly overstates the amount, which could result in dangerous dosing errors.
C. 1 mg = 1,000 mcg: One milligram is equal to 1,000 micrograms. This is the correct conversion and is essential for accurate medication calculations, particularly for drugs that require very small doses.
D. 1 mcg = 100 mg: One microgram is far smaller than a milligram; this option reverses the relationship and exaggerates the amount, which is unsafe for clinical dosing.
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