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The client receives one dose of 200 mg of a medication. How much drug is in the body at 3 half-lives?

100

Answer and Explanation

The Correct Answer is C

Here’s the step-by-step process:

After the first half-life (1 half-life), 50% of the initial drug is left.

200 mg → 100 mg (half is eliminated, 100 mg remains).

After the second half-life (2 half-lives), 50% of the remaining drug is eliminated again.

100 mg → 50 mg (half of 100 mg is eliminated, 50 mg remains).

After the third half-life (3 half-lives), 50% of the remaining drug is eliminated again.

50 mg → 25 mg (half of 50 mg is eliminated, 25 mg remains).

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Correct Answer is ["4"]

Explanation

Convert micrograms (mcg) to milligrams (mg):

The prescribed dose is 200 mcg.

We know that 1 mg = 1000 mcg.

Therefore, 200 mcg = 200 / 1000 = 0.2 mg.

Calculate the number of tablets:

Each tablet contains 0.05 mg of levothyroxine.

The desired dose is 0.2 mg.

We can use the following formula: (Desired dose) / (Tablet strength) = Number of tablets

(0.2 mg) / (0.05 mg/tablet) = 4 tablets

A. Ask the client what prescribed medications are taken at home B. Contact the prescriber to clarify the order. C. Wait until the prescriber makes rounds again to clarify the order D. Ask a colleague what the order says.

Correct Answer is B

Explanation

A) Ask the client what prescribed medications are taken at home: While obtaining information about the client's home medications is important, this action does not address the specific issue of the unclear order. It is not an appropriate substitute for clarifying the medication order that the nurse is having difficulty transcribing.

B) Contact the prescriber to clarify the order: This is the best action for the nurse to take. If the nurse is unsure about the order due to illegible handwriting, the safest and most effective way to clarify the order is to directly contact the prescriber. This ensures that the nurse administers the correct medication and dose, reducing the risk of medication errors.

C) Wait until the prescriber makes rounds again to clarify the order: Waiting for the prescriber to make rounds is not an appropriate or timely solution. Medication administration should not be delayed due to unclear orders, as it could lead to treatment delays or potential harm to the patient. Immediate clarification is necessary.

D) Ask a colleague what the order says: While consulting a colleague might be helpful, it is not the most reliable or safe course of action. The nurse should not rely on others to interpret unclear orders, as there may be different interpretations or misunderstandings. Contacting the prescriber directly ensures the order is clarified accurately and safely.

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The client receives one dose of 200 mg of a medication. How much drug is in the body at 3 half-lives?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client is prescribed levothyroxine 200 mcg PO daily before breakfast. In the medication room are tablets labelled 0.05 mg/tablet. How many tablet(s) will you administer to the client? Fill in the blank with a numeric value. Answer to the nearest whole tablet

Correct Answer is ["4"]

Explanation

During a period of time when the computerized medication order system was down, the prescriber wrote admission the nurse is transcribing them. The nurse is having difficulty transcribing one order because of the prescriber's handwriting. Which is the best action for the nurse to take at this time?

Correct Answer is B

Explanation

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