Which abbreviation is used to indicate a medication should be taken 'as needed'?
QID
PRN
BID
AC
The Correct Answer is B
A. QID: QID stands for “four times a day” and indicates a scheduled dosing frequency, not as-needed administration.
B. PRN: PRN is the standard abbreviation for “pro re nata,” meaning the medication should be taken only as needed for specific symptoms or situations. It allows flexibility based on patient condition or response.
C. BID: BID means “twice a day” and represents a regular, scheduled dosing interval rather than an as-needed basis.
D. AC: AC stands for “before meals” and refers to timing of medication administration relative to food intake, not frequency or need-based use.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Calculation:
- Identify the hour and minute in 12-hour time
Hour: 3 PM
Minute: 45
- Convert PM hours to 24-hour format
For PM times (except 12 PM), add 12 to the hour: 3 + 12 = 15
- Combine the hour and minutes
= 1545
Correct Answer is D
Explanation
A. Anti-diarrheal: Magnesium sulfate is not used to reduce diarrhea; some magnesium salts may actually have a laxative effect. Anti-diarrheal agents act by slowing intestinal motility or absorbing fluid, which is unrelated to magnesium sulfate’s mechanism.
B. Antihistamine: Antihistamines block histamine receptors to reduce allergy symptoms, nausea, or gastric acid secretion. Magnesium sulfate does not interact with histamine pathways and does not treat allergic reactions.
C. Opioid: Opioids act on central nervous system receptors to relieve pain. Magnesium sulfate does not have analgesic or narcotic properties. Its pharmacologic action is unrelated to opioid receptor activity.
D. Electrolyte: Magnesium sulfate provides magnesium ions, an essential electrolyte involved in neuromuscular function, cardiac conduction, and enzymatic reactions. It is used to correct magnesium deficiency, prevent seizures in preeclampsia, and manage certain arrhythmias.
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