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question 15
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you are to give 600 mg of a certain drug every 4 hours for one day. your patient will receive a total of mg in the 24 - hour period.
type your answer in decimal form if necessary, do not use fractions.
question 16
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a drug is available in concentrations of 400 mg/ml, 500mg/ml or 600 mg/ml. you need to administer 1,200mg. you choose the 600mg/ml concentration and give ml.
type your answer in decimal form if necessary, do not use fractions.
question 17
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the prescribers orders read to give 0.275 mg of a drug. the available liquid is supplied in a concentration of 0.25mg/20 ml. you will give the patient ml.
type your answer in decimal form if necessary, do not use fractions.

Explanation:

Question 15

Step1: Calculate number of doses

In 24 hours, with a dose every 4 hours, the number of doses is $24 \div 4 = 6$.

Step2: Calculate total drug amount

Each dose is 600 mg, so total amount is $600 \times 6 = 3600$.

Step1: Use the formula for volume

The formula is $Volume = \frac{Mass}{Concentration}$. Here, mass is 1200 mg and concentration is 600 mg/mL.

Step2: Substitute values

$Volume = \frac{1200}{600} = 2$.

Step1: Find the concentration per mL

First, find the concentration: $\frac{0.25\ mg}{20\ mL} = 0.0125\ mg/mL$.

Step2: Calculate volume for 0.275 mg

Using $Volume = \frac{Mass}{Concentration}$, substitute mass = 0.275 mg and concentration = 0.0125 mg/mL. So $Volume = \frac{0.275}{0.0125} = 22$.

Answer:

3600

Question 16