Question

The physician orders Tagamet for gastrointestinal ulcers 30 mg/kg/day PO in four divided doses for a child weighing 22 kg. The dose on hand is Tagamet 300 mg/5 mL. How many mL per day will the child receive?

Answer 1

Correct Answers:

11

Rationale :

🧮Total daily dose is calculated as 30 mg/kg × 22 kg = 660 mg/day.

📏Using the concentration 300 mg/5 mL, that’s 60 mg/mL.

🔢To find volume per day, compute 660 mg ÷ 60 mg/mL = 11 mL/day.

💡Dividing into four doses changes mL per dose (2.75 mL), but the per-day total stays 11 mL.

📌Core Message

Correctly convert weight-based mg/day to mL/day using the drug concentration to get 11 mL/day.

Answer 2

Correct Answers:

45

Rationale :

⏱️Compute flow as (30 mL ÷ 40 min) = 0.75 mL/min.

💧With 60 gtt/mL (microdrip), rate is 0.75 × 60 = 45 gtts/min.

🧮Microdrip sets standardize to 60 gtt/mL, simplifying math.

📏The result is already in gtts/min, so no further conversion is needed.

📌Core Message

Use mL/min × gtt/mL with a 60 gtt/mL microdrip to reach 45 gtts/min.

Answer 3

Correct Answers:

50

Rationale :

🧮Find mL/min: 150 mL ÷ 45 min = 3.33 mL/min.

💧Apply drop factor 15 gtt/mL: 3.33 × 15 ≈ 50 gtts/min.

📏This uses the standard formula: (Volume × Drop factor) ÷ Time.

⏱️Rounding to the nearest whole drop gives 50.

📌Core Message

The IV drip rate comes from volume–time–drop factor math, yielding ≈50 gtts/min.

Answer 4

Correct Answers:

60

Rationale :

📦Concentration: 1,000 mg ÷ 500 mL = 2 mg/mL.

⏱️Infusion rate: 30 mL/hr.

🧮Dose/hr: 30 mL/hr × 2 mg/mL = 60 mg/hr.

💡This is a direct proportion conversion from mL/hr to mg/hr.

📌Core Message

Convert concentration to mg/mL and multiply by mL/hr for 60 mg/hr.

Answer 5

Correct Answers:

14

Rationale :

📦Solution strength: 125 mg ÷ 250 mL = 0.5 mg/mL.

🧮Required dose: 7 mg/hr.

📏Volume/hr: 7 mg/hr ÷ 0.5 mg/mL = 14 mL/hr.

💡This ensures the pump rate delivers the ordered mg/hr.

📌Core Message

Use mg/hr ÷ (mg/mL) to set the pump at 14 mL/hr.

Answer 6

Correct Answers:

1400

Rationale :

📦Concentration: 25,000 units ÷ 250 mL = 100 units/mL.

⏱️Infusion rate: 14 mL/hr.

🧮Dose/hr: 14 mL/hr × 100 units/mL = 1,400 units/hr.

💡Simple units-per-mL conversion yields the hourly units.

📌Core Message

Convert to units/mL, then multiply by mL/hr to get 1,400 units/hr.

Answer 7

Correct Answers:

21

Rationale :

🧮Total minutes: 8 hr × 60 = 480 min.

📏Flow: 1,000 mL ÷ 480 min = 2.083 mL/min.

💧With 10 gtt/mL, rate is 2.083 × 10 = 20.83 ≈ 21 gtts/min.

💡Round to the nearest whole drop.

📌Core Message

Convert to mL/min, multiply by gtt/mL, then round to get 21 gtts/min.

Answer 8

Correct Answers:

56

Rationale :

⏱️Infusion time: 40 minutes for 150 mL gives 150 ÷ 40 = 3.75 mL/min.

💧Apply 15 gtt/mL: 3.75 × 15 = 56.25 ≈ 56 gtts/min.

📘Patient weight does not affect the drip rate when volume and time are fixed.

🧮Round to the nearest whole drop for the final rate.

📌Core Message

Use volume, time, and drop factor—not weight—to get ~56 gtts/min.

Answer 9

Correct Answers:

5.6

Rationale :

📦Concentration: 400 mg/250 mL = 1.6 mg/mL = 1600 mcg/mL.

⏱️Rate in mL/min: 15 mL/hr ÷ 60 = 0.25 mL/min.

🧮mcg/min delivered: 1600 × 0.25 = 400 mcg/min.

⚖️Weight-based rate: 400 mcg/min ÷ 72 kg ≈ 5.56 ≈ 5.6 mcg/kg/min.

📌Core Message

Stepwise convert to mcg/min, then weight-normalize to get 5.6 mcg/kg/min.

Answer 10

Correct Answers:

0.5

Rationale :

📦Strength per tablet: 0.025 mg = 25 mcg.

🧮Ordered dose: 12.5 mcg, which is half of 25 mcg.

📏Since the tablet is scored, 0.5 tablet is appropriate and accurate.

💡Always align mcg↔mg units to avoid errors (0.025 mg = 25 mcg).

📌Core Message

Convert units correctly and use the scored tablet to give 0.5 tablet (12.5 mcg).

Dosage Calculation Exam-6

No.

1 :
The physician orders Tagamet for gastrointestinal ulcers 30 mg/kg/day PO in four divided doses for a child weighing 22 kg. The dose on hand is Tagamet 300 mg/5 mL. How many mL per day will the child receive?

2 :
The patient is to receive medication in 30 mL of fluid over 40 minutes. Using a drip factor of 60 gtts/mL, what would your drip rate be?

3 :
The patient is to receive Rocephin 1 g IV every 12 hours. The Rocephin is mixed in 150 mL D5W. Figure the drip rate if it is to infuse over 45 minutes and the drop factor is 15.

4 :
The patient is receiving an Aminophylline drip at 30 mL per hour. The drug is mixed with one gram in 500 mL. How many milligrams are you giving per hour?

5 :
The order for the patient is 7 mg/hr of continuous morphine sulfate infusion. The solution is prepared as 125 mg morphine in 250 mL D5W. Calculate the mL per hour needed to deliver the correct drug dosage.

6 :
The patient is receiving a continuous heparin infusion running at 14 mL/hr. The solution available is 250 mL containing 25,000 units of heparin. Calculate the dosage (units) of heparin the patient receives per hour.

7 :
The patient is to receive 1,000 mL in 8 hours. You are using 10 gtt/mL tubing. What will your gtt/min be?

8 :
The patient weighs 85 lbs and is to receive Rocephin 1 g every 12 hours. The Rocephin is mixed in 150 mL D5W. Figure the gtts/min if it is to infuse over 40 minutes using 15 gtt/mL tubing.

9 :
A hypotensive client is receiving IV dopamine (400 mg/250 mL). The client weighs 72 kg and is receiving 15 mL/hr. How many mcg/kg/min is the client receiving?

10 :
You are to administer 12.5 mcg of Synthroid PO to the patient. The pharmacy sends Synthroid 0.025 mg per scored tablet. How many tablets should you administer?

Dosage Calculation Exam-6

No.

1 : The physician orders Tagamet for gastrointestinal ulcers 30 mg/kg/day PO in four divided doses for a child weighing 22 kg. The dose on hand is Tagamet 300 mg/5 mL. How many mL per day will the child receive?

2 : The patient is to receive medication in 30 mL of fluid over 40 minutes. Using a drip factor of 60 gtts/mL, what would your drip rate be?

3 : The patient is to receive Rocephin 1 g IV every 12 hours. The Rocephin is mixed in 150 mL D5W. Figure the drip rate if it is to infuse over 45 minutes and the drop factor is 15.

4 : The patient is receiving an Aminophylline drip at 30 mL per hour. The drug is mixed with one gram in 500 mL. How many milligrams are you giving per hour?

5 : The order for the patient is 7 mg/hr of continuous morphine sulfate infusion. The solution is prepared as 125 mg morphine in 250 mL D5W. Calculate the mL per hour needed to deliver the correct drug dosage.

6 : The patient is receiving a continuous heparin infusion running at 14 mL/hr. The solution available is 250 mL containing 25,000 units of heparin. Calculate the dosage (units) of heparin the patient receives per hour.

7 : The patient is to receive 1,000 mL in 8 hours. You are using 10 gtt/mL tubing. What will your gtt/min be?

8 : The patient weighs 85 lbs and is to receive Rocephin 1 g every 12 hours. The Rocephin is mixed in 150 mL D5W. Figure the gtts/min if it is to infuse over 40 minutes using 15 gtt/mL tubing.

9 : A hypotensive client is receiving IV dopamine (400 mg/250 mL). The client weighs 72 kg and is receiving 15 mL/hr. How many mcg/kg/min is the client receiving?

10 : You are to administer 12.5 mcg of Synthroid PO to the patient. The pharmacy sends Synthroid 0.025 mg per scored tablet. How many tablets should you administer?

1 :
The physician orders Tagamet for gastrointestinal ulcers 30 mg/kg/day PO in four divided doses for a child weighing 22 kg. The dose on hand is Tagamet 300 mg/5 mL. How many mL per day will the child receive?

2 :
The patient is to receive medication in 30 mL of fluid over 40 minutes. Using a drip factor of 60 gtts/mL, what would your drip rate be?

3 :
The patient is to receive Rocephin 1 g IV every 12 hours. The Rocephin is mixed in 150 mL D5W. Figure the drip rate if it is to infuse over 45 minutes and the drop factor is 15.

4 :
The patient is receiving an Aminophylline drip at 30 mL per hour. The drug is mixed with one gram in 500 mL. How many milligrams are you giving per hour?

5 :
The order for the patient is 7 mg/hr of continuous morphine sulfate infusion. The solution is prepared as 125 mg morphine in 250 mL D5W. Calculate the mL per hour needed to deliver the correct drug dosage.

6 :
The patient is receiving a continuous heparin infusion running at 14 mL/hr. The solution available is 250 mL containing 25,000 units of heparin. Calculate the dosage (units) of heparin the patient receives per hour.

7 :
The patient is to receive 1,000 mL in 8 hours. You are using 10 gtt/mL tubing. What will your gtt/min be?

8 :
The patient weighs 85 lbs and is to receive Rocephin 1 g every 12 hours. The Rocephin is mixed in 150 mL D5W. Figure the gtts/min if it is to infuse over 40 minutes using 15 gtt/mL tubing.

9 :
A hypotensive client is receiving IV dopamine (400 mg/250 mL). The client weighs 72 kg and is receiving 15 mL/hr. How many mcg/kg/min is the client receiving?

10 :
You are to administer 12.5 mcg of Synthroid PO to the patient. The pharmacy sends Synthroid 0.025 mg per scored tablet. How many tablets should you administer?