After assessing a client, a primary healthcare provider prescribes diphenhydramine 25 mg IV STAT for anaphylaxis. The pharmacy supplies a vial with a concentration of 50 mg/mL.
How much and when should a nurse administer this medication?
Administer 0.5 mL of medication immediately to the client
Administer 25 mg of medication once a day to the client for two weeks
Administer 25 mg of medication every eight hours
Administer 0.5 mL of medication if the client has symptoms of allergy
Administer 0.5 mL of medication if the client has symptoms of allergy
The Correct Answer is A
To find how much medication to administer, you need to calculate the following:
- The volume of diphenhydramine in milliliters
- The infusion time in minutes
First, divide the dose of diphenhydramine by the concentration to get the volume in milliliters:
25 mg / 50 mg/mL = 0.5 mL diphenhydramine should be diluted in 10 to 20 mL of normal saline and infused over at least 2 minutes.
Therefore, the nurse should administer **0.5 mL** of diphenhydramine diluted in 10 to 20 mL of normal saline over **at least 2 minutes**.
The nurse should administer this medication **as soon as possible** after receiving the order and the medication from the pharmacy, as STAT means immediately or urgently. The nurse should also monitor the client for signs of improvement or adverse reactions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
The nurse should administer 2 tablets per dose to this patient.
This answer is correct because it is based on a simple unit conversion and ratio and proportion calculation. The nurse can convert 0.1 mg to 100 mcg by multiplying by 1000, since there are 1000 mcg in 1 mg. Then, the nurse can set up a proportion as follows:
50 mcg / 1 tablet = 100 mcg / x tablets
Cross-multiplying and solving for x gives:
x = 2 tablets
Therefore, the nurse should administer 2 tablets of Synthroid to deliver 0.1 mg or 100 mcg of the medication to the patient.
Correct Answer is D
Explanation
The nurse should administer 4 mL to this patient.
This answer is correct because it is based on a simple ratio and proportion calculation. The nurse can set up a proportion as follows:
2 mg / 1 mL = 8 mg / x mL
Cross-multiplying and solving for x gives:
x = 4 mL
Therefore, the nurse should administer 4 mL of ondansetron to deliver 8 mg of the medication to the patient.
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