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Drug Dosage Calculation Questions and Answers (Q&A)

The correct answer is option B – 300mL/hr.
Since you need to give 4gm of magnesium sulphate over 20 minutes and it comes in 40gm/1000mL
You do the following:
Divide 4gm by 40gm and multiply by 1000mL
4/40 = 0.01

0.01 1000 = 100
Divide one hour (60 minutes) by 20 and multiple the results by 100
60/20
3 100 = 300
Therefore, you will set the pump at 300mL/hour to administer 4gm Magnesium sulphate IV in 20 minutes.
Hope this helps.

5 Answers

Amount of Solution (mL) x Drop Factor (gtt/mL) =xgtt/min
Time (minutes)


Don't forget to convert 1.5 L into mL AND 12 hours into minutes!

1500mLx20gtt/mL
720 minutes
  1. 1500 mLx20 gtt/mL = 30,000 gtt
  2. 30,000 gtt/720 minutes = 41.66666666 gtt/min
  3. Answer after rounding: 42 gtt/min

2 Answers

B is the answer to this question. The nurse will be in charge of adjusting the clamp on the intravenous tube. The adjustments can either slow down or speed up the rate of the flow of IV fluid. In order to see if the flow is correct, they would count the number of drops per minute.

If there would be no control, the rate of the IV flow will only depend on gravity. The rate of the fluid will usually depend on several factors such as your age, your body size, and the type of medical condition that you are being treated for. There are some complications that may occur when you get the fluid too fast or too slow.

2 Answers

120 mcg = 0.12 mg
If each suspension of Onquid is 0.06 mg/ml
This means each ml contains 0.06mg of Onquid
If 1 ml = 0.06mg
Then 0.12 mg = 2ml
Therefore, the amount of ml to be administered by the nurse as order by the physician is 2 ml.

2 Answers

  1. The physician ordered Ritodrine IV 70mcg/min. The pharmacy sent up Ritodrine 150mg premixed in 500mL D5W. You would set your IV pump at ________mL/hour.

2 Answers

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