A prescription indicates that a patient should receive Phenergan® 12.5 mg pr for nausea and vomiting. By what route should this medication be administered?
topically
transdermally
through the rectum
through the vagina
The Correct Answer is C
A. topically: Topical administration involves applying medication to the skin surface, typically for local effects. "pr" (per rectum) does not refer to topical use.
B. transdermally: Transdermal delivery uses patches that release medication through the skin into the bloodstream over time. Phenergan® is not ordered in a transdermal form here, and "pr" does not support this route.
C. through the rectum: The abbreviation "pr" stands for per rectum, which means the medication should be administered into the rectum. This is the correct route for Phenergan® suppositories prescribed for nausea and vomiting.
D. through the vagina: Vaginal administration is typically indicated with terms like "pv" (per vagina). "pr" specifically refers to rectal administration.
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Related Questions
Correct Answer is D
Explanation
A. Dispense either a chewable tablet or liquid form of the medication: Even though alternatives exist, dispensing a different form without prescriber authorization may lead to dosing inconsistencies or legal concerns. Proper protocol requires confirmation.
B. Dispense the medication as written, breaking the tablets prior to dispensing them: Splitting a 500 mg tablet into quarters may not ensure accurate dosing, especially in a child. Tablets may not split evenly, and not all are scored or safe to divide.
C. Dispense the medication as written, instructing the parent to break the tablets into four pieces: This puts responsibility on the caregiver to split tablets into exact quarters, which can lead to dosing errors. It is unsafe and inappropriate for pediatric medication.
D. Consult with the pharmacist or authorized prescriber before changing the form of the medication: The safest and most appropriate action is to confirm any modifications to a prescription. For pediatric patients, ensuring accurate dosage form and administration requires provider consultation.
Correct Answer is ["3.73"]
Explanation
- Calculate the total dose in milligrams (mg) for the patient.
Total dose (mg) = Ordered dose (mg/kg) × Patient weight (kg)
= 10 mg/kg × 56 kg
= 560 mg.
Dosage strength = 150 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Total dose (mg) / Dosage strength (mg/mL)
= 560 mg / 150 mg/mL
= 3.7333... mL.
- Round to the nearest hundredth.
= 3.73 mL/dose.
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