FLUIDS: QUIZ 3

Fluid Dosage Calculations

1. Solu-Cortef is available in a 100 mg/2mL IM solution. Your patient is to receive 50 mg IM. What amount will you give?

a. 1 mL b. 0.5 mL c. 2 mL d. 1.5 mL

2. Dilaudid 3 mg IM is ordered for your patient. The only available dosage strength is 2 mg/mL. What amount will you give?

a. 0.6 mL b. 1 mL c. 1.5 mL d. 2 mL

3. Thorazine 37.5 mg has been ordered for your patient. The only available dosage is 25 mg/mL. What amount will you give?

a. 0.5 mL b. 1 mL c. 1.5 mL d. 2 mL

4. 500 mg of Ampicillin solution is ordered; available solution contains 125 mg/5mL. How much will you give?

a. 20 mL b. 4 mL c. 1.25 mL d. 16 mL

5. Penicillin G Potassium 1,000,000 units is ordered; available solution contains 500,000 units per cc. How many mL will you give?

a. 0.5 mL b. 1 mL c. 1.5 mL d. 2 mL

CLPNA Fluid Dosage Calculations: Quiz 3 page 1

6. 50 mg of Demerol is ordered; available solution contains 100 mg/mL. How much will you give?

a. 2 mL b. 0.5 mL c. 1.5 mL d. 1 mL

7. A solution contains furosemide (frusemide) 10 mg/mL. How many milligrams of frusemide are in 3 mL of solution?

a. 30 mg b. 15 mg c. 3.3 mg d. 300 mg

8. A solution contains morphine hydrochloride 2 mg/mL. How many milligrams of morphine hydrochloride are in 5 mL of solution?

a. 10 mg b. 0.2 mg c. 2.5 mg d. 100 mg

9. A solution contains morphine hydrochloride 40 mg/mL. How many milligrams of morphine hydrochloride are in 5 mL of solution?

a. 8 mg b. 0.125 mg c. 100 mg d. 200 mg

10. A suspension contains phenytoin 125 mg/5mL. How many milligrams of phenytoin are in 30 mL of the suspension?

a. 3750 mg b. 750 mg c. 4.2 mg d. 625 mg

11. A solution contains fluoxetine 20 mg/5mL. How many milligrams of fluoxetine are in 25 mL of solution?

a. 500 mg b. 1.25 mg c. 100 mg d. 250 mg

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12. A suspension contains erythromycin 250 mg/5mL. How many milligrams of erythromycin are in 20 mL of suspension?

a. 5000 mg b. 12.5 mg c. 1250 mg d. 1000 mg

13. A syrup contains chlorpromazine 25 mg/5mL. How many milligrams of chlorpromazine are in 30 mL of syrup?

a. 750 mg b. 1.2 mg c. 150 mg d. 125 mg

14. A mixture contains penicillin 250 mg/5mL. How many milligrams/grams of penicillin are in 25 mL of mixture?

a. 1.25 g b. 10 mg c. 750 mg d. 6250 mg

15. Paracetamol 750 mg is to be given to a patient via syrup. The stock on hand contains 150 mg in 5 mL. What volume of syrup is to be administered to the patient?

a. 5 mL b. 25 mL c. 30 mL d. 150 mL

16. Furosemide (frusemide) 125 mg is ordered. The stock solution contains 50 mg/mL. What volume of solution should be administered to the patient?

a. 25 mL b. 2.5 mL c. 0.4 mL d. 5 mL

17. A patient is prescribed 100 mg of morphine hydrochloride to be administered orally. On hand is solution that has 40 mg/mL. What dosage should the patient be given?

a. 2.5 mL b. 25 mL c. 0.25 mL d. 0.40 mL

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18. A patient is prescribed 1250 mg of erythromycin to be administered orally. On hand is suspension that has 250 mg/5mL. What dosage should the patient be given?

a. 2.5 mL b. 5 mL c. 25 mL d. 50 mL

19. A patient is prescribed 35 mg of chlorpromazine to be administered orally. On hand is syrup that has 25 mg/5mL. What dosage should the patient be given?

a. 1.4 mL b. 5 mL c. 0.7 mL d. 7 mL

20. A patient is prescribed 200 mg amoxicillin trihydrate to be administered orally. On hand is solution that has 250 mg/5mL. What dosage should the patient be given?

a. 7.5 mL b. 1.5 mL c. 0.67 mL d. 4 mL

21. A patient is prescribed 0.16 g acetaminophen for pain. On hand is 160 mg/5mL. What dosage should the patient be given?

a. 24 mL b. 4.8 mL c. 5 mL d. 20 mL

22. A patient is prescribed 600 mg of erythromycin ethylsuccinate suspension. On hand is a suspension that has 400 mg/5mL. What dosage should the patient be given?

a. 20 mL b. 4 mL c. 0.25 mL d. 7.5 mL

23. A patient is prescribed 0.1 g of theophylline elixir. In stock is theophylline elixir 80 mg/15mL. What dosage should the patient be given?

a. 16.4 mL b. 20 mL c. 18.8 mL d. 14.6 mL

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24. The order is for 400 000 units of nystatin suspension. In stock is nystatin suspension 100 000 units/mL. What dosage should the patient be given?

a. 1.4 mL b. 4 mL c. 5 mL d. 0.7 mL

25. A patient is prescribed 20 g lactulose to be administered via gastric tube. On hand is a lactulose 10 g/15mL. What dosage should the patient be given?

a. 32.4 mL b. 30 mL c. 24 mL d. 16 mL

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Answer Key to Infusion: Quiz 3

Q01 a 100 mg/2mL ÷ 2 = 50 mg/mL; 50 mg ÷ 50 mg/mL = 1 mL Q02 c 3 mg ÷ 2 mg/mL = 1.5 mL Q03 c 37.5 mg ÷ 25 mg/mL = 1.5 mL Q04 a 125 mg/5mL ÷ 5 = 25 mg/mL; 500 mg ÷ 25 mg/mL = 20 mL Q05 d 1,000,000 units ÷ 500,000 units/cc = 2 mL Q06 b 50 mg ÷ 100 mg/mL = 0.5 mL Q07 a 10 mg/mL x 3 mL = 30 mg Q08 a 2 mg/mL x 5 mL = 10 mg Q09 d 40 mg/mL x 5 mL = 200 mg Q10 b 125 mg/5mL ÷ 5 = 25 mg/mL x 30 mL= 750 mg Q11 c 20 mg/5 mL ÷ 5 = 4 mg/mL x 25 mL = 100 mg Q12 d 250 mg/5 mL ÷ 5 = 50 mg/mL x 20 mL = 1000 mg or 1 g Q13 c 25 mg/5 mL ÷ 5 = 5 mg/mL x 30 mL = 150 mg Q14 a 250 mg/mL ÷ 5 = 50 mg/mL x 25 mL = 1250 mg or 1.25 g Q15 b 150 mg/5 mL ÷ 5 = 30 mg/mL; 750 ÷ 30 = 25 mL needed to provide 750 mg of paracetamol Q16 b 125 mg ÷ 50 mg/mL = 2.5 mL of solution required Q17 a 100 mg ÷ 40 mg/mL = 2.5 mL Q18 c 250 mg/5mL ÷ 5 = 50 mg/mL; 1250 mg ÷ 50 mg/mL = 25 mL Q19 d 25 mg/5mL ÷5 = 5 mg/mL; 35 mg ÷ 5 mg/mL = 7 mL Q20 d 250 mg/5 mL ÷ 5 = 50 mg/mL; 200 mg ÷ 50 mg/mL = 4 mL Q21 c 160 mg/5mL ÷ 5 = 32 mg/mL; 0.16 g x 1000 = 160 mg ÷ 32 mg/mL = 5 mL Q22 d 400 mg/5mL ÷ 5 = 80 mg/mL; 600 mg ÷ 80 mg/mL = 7.5 mL Q23 c 0.1 g x 1000 = 100 mg; 100 mg ÷ 80 mg = 1.25 x 15 mL = 18.75 or 18.8 mL Q24 b 400 000 units ÷ 100 000 units/mL = 4 mL Q25 b 20 g ÷ 10 g = 2 x 15 mL = 30 mL

CLPNA Fluid Dosage Calculations: Quiz 3 page 6