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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 ["20"]

Explanation

Identify the total units of heparin in the bag:

The IV bag contains 25,000 units of heparin in 250 mL.

Identify the desired hourly dose:

The client is ordered to receive 2,000 units of heparin per hour.

Calculate the mL containing 2,000 units:

We can set up a proportion:

(25,000 units) / (250 mL) = (2,000 units) / (x mL)

Solving for x, we get:

x = (2,000 units x 250 mL) / 25,000 units x = 20 mL

A. The mother should not take any medication while breast feeding in order to prevent harm to the infant B. Many medications cross into the breast milk in small amounts and could cause harm to the infant C. While medication can cross into the breast milk, no infants have ever been harmed because of this D. It is unlikely that a large enough amount of medication will cross into the breast milk and cause harm to the infant.

Correct Answer is B

Explanation

A) The mother should not take any medication while breast feeding in order to prevent harm to the infant: This statement is too restrictive and not accurate. While some medications should be avoided during breastfeeding, many medications can be taken safely in small amounts. The focus should be on which medications are safe for breastfeeding, not a blanket prohibition on all medications. Some medications are compatible with breastfeeding, and the benefits of taking them may outweigh any potential risks.

B) Many medications cross into the breast milk in small amounts and could cause harm to the infant: This statement is correct. While many medications do pass into breast milk in small amounts, it’s important to recognize that some medications can pose risks to the infant depending on the type of medication, dosage, and timing of breastfeeding. Nurses should educate the mother to always consult with a healthcare provider before taking any medication while breastfeeding.

C) While medication can cross into the breast milk, no infants have ever been harmed because of this: This statement is not accurate. While many medications may pass into breast milk in small amounts, there are documented cases of infants being harmed by medications transferred via breastfeeding. It is crucial to be cautious and informed about the safety of medications taken during breastfeeding.

D) It is unlikely that a large enough amount of medication will cross into the breast milk and cause harm to the infant: While it may be true that in many cases, only small amounts of medication pass into breast milk, this statement oversimplifies the issue. The amount and type of medication, as well as the infant’s age, weight, and health, are all factors that need to be considered. Some medications may pose a significant risk to the infant, and careful evaluation is necessary.

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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 to be started on a heparin intravenous infusion at 2,000 units per hour. On hand is an IV bag labeled 25,000 units/ 250 mL. At what rate (mL/hour) will the nurse set the pump? (Answer to the nearest whole number)

Correct Answer is ["20"]

Explanation

The nurse is providing discharge instructions to a female client who delivered a healthy, full-term infant. What information should the nurse provide about taking medications while breast feeding?

Correct Answer is B

Explanation

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