Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 1

1

Dosage Calculations 2

Worksheet #2

1. Ordered: Rocephin 200 mg IV q8h

Available: Rocephin 250 mg powered vial

Reconstitution: Add 2.4 mL sterile water to yield a total volume of 2.5 mL

What is the concentration / mL?

How much volume is administered per dose?

Draw an arrow at the correct measurement:

2. Ordered: Ampicillin 800 mg IV QID

Available: Ampicillin 1 g powdered vial

Reconstitution: Add 9.6 mL NS to yield a total volume of 10 mL

What is the concentration/mL?

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 2

2

3. Ordered: Ancef 1.4 g IV BID

Available: Ancef 2 g powdered vial

Reconstitution: Add 4.4 mL NS

Concentration: 370 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

4. Ordered: Ceftazidime 750 mg IV TID

Available: Ceftazidime 2 g powdered vial

Reconstitution: Add 7.5 mL NS to yield a total volume of 8 mL

Concentration: 250 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

5. Ordered: Cefazolin 500 mg IV TID

Available: Cefazolin 1 g powdered vial

Reconstitution: Add 4.8 mL sterile water to yield a total volume of 5 mL

Concentration: 200 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 3

3

6. Ordered: Piperacillin 1.4 g IV Q6H

Available: Piperacillin 2 g powdered vial

Reconstitution: Add 19.6 mL sterile water to yield a total volume of 20 mL

What is the Concentration/mL?

How much volume is administered per dose?

Draw an arrow at the correct measurement:

7. Ordered: Kefzol 240 mg IM q8h

Available: Kefzol 1 g powdered vial

Reconstitution: Add 3.7 mL sterile water to yield a total volume of 4 mL

Total concentration: 250 mg/mL

How much volume is administered per dose (round to the nearest hundredth)?

Draw an arrow at the correct measurement:

8. Ordered: Cefotetan 1500 mg IM q8h

Available: Cefotetan 2 g powdered vial

Reconstitution: Add 3.5 mL sterile water to yield a total volume of 4 mL

Total concentration: 500 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 4

4

9. Ordered: Gentamicin 50 mg IM TID

Available: Gentamicin 100 mg powered vial

Reconstitution: Add 1.8 mL sterile water to yield a total volume of 2 mL

How much volume is administered per dose?

What is the concentration/mL?

Draw an arrow at the correct measurement:

10. Ordered: Gentamicin 25 mg IM QID

Available: Gentamicin 50 mg powered vial

Reconstitution: Add 1.3 mL sterile water to yield a total volume of 1.5mL

How much volume is administered per dose?

What is the concentration/mL?

Draw an arrow at the correct measurement:

11. Ordered: Ampicillin 500 mg IV QID

Available: Gentamicin 1 g powered vial

Reconstitution: Add 4.5 mL sterile water to yield a concentration of 1000mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 5

5

12. Ordered: Amoxicillin 75 mg po TID x 10 days

Available: Amoxicillin 2.5 g powdered bottle

Reconstitution: Add 88 mL tap water to yield a total volume of 100 mL and a concentration of 25 mg/

mL

How much volume is administered per dose?

How many mL/24 hours are administered?

How many mL per course of treatment?

How many mL are left over in the bottle at the end of the course of treatment?

Draw an arrow at the correct measurement:

13. Ordered: Cefotaxime 850 mg IV q12h

Available: Cefotaxime 1 g powdered vial

Reconstitution: Add 3 mL for a total volume of 3.4 mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 6

6

14. Ordered: Duricef 500 mg po BID x 7 days

Available: Duricef 7.5 g powdered bottle

Reconstitution: Add 62 mL tap water to yield total volume of 75 mL and a concentration of 100 mg/

mL

How much volume is administered per dose?

How many mL/24 hours are administered?

How many mL per course of treatment?

How many mL are left over in the bottle at the end of the course of treatment?

Draw an arrow at the correct measurement:

15. Ordered: Cefaclor 250 mg po TID

Available: Cefaclor 500 mg powdered vial

Reconstitution: Add 3 mL for a total volume of 3.4 mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 7

7

16. Ordered: Kefzol 500 mg IV BID

Available: Kefzol 600 mg powdered vial

Reconstitution: Add 2.5 mL sterile water

Concentration: 165 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

17. Ordered: Ampicillin 125 mg IM q6h

Available: Ampicillin 500 mg powdered vial

Reconstitution: Add 4.6 mL Sterile water

Concentration: 104.2 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

18. Ordered: Cloxacillin 500 mg IV q12h

Available: Cloxacillin 250 mg powdered vial

Reconstitution: Add 3.1 mL Normal Saline

Concentration: 69.4 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 8

8

19. Ordered: Ancef 2 g IM daily

Available: Ancef 4 g powdered vial

Reconstitution: Add 3.7 mL Sterile water

Concentration: 1052.6 mg/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

20. Ordered: Penicillin G 200,000 units IV QID

Available: Penicillin G 600,000 units powdered vial

Reconstitution: Add 5.5 mL Normal Saline

Concentration: 100,000 units/mL

How much volume is administered per dose?

Draw an arrow at the correct measurement:

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 9

9

ANSWERS:………………………………………………………………………………………………

1. 100 mg / mL; 2 mL

2. 100 mg / mL; 8 mL

3. 3.8 mL/dose

4. 3 mL/dose

5. 2.5 mL/dose

6. 100 mg/mL; 14 mL/dose

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 10

10

7. 0.96 mL

8. 3 mL/dose

9. 1 mL/dose; 50 mg/mL

10. 0.75 mL; 33.3 mg/mL

11. 0.5 mL/dose

12. 3 mL/dose; 9 mL/24 hours; 90 mL/10 days; 10 mL

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 11

11

13. 2.9 mL/dose

14. 5 mL/dose; 10 mL/24 hours; 70 mL/7 days; 5 mL

15. 1.7 mL/dose

16. 3 mL/dose

17. 1.2 mL/dose

18. 7.2 mL/dose

Academic Success Centre www.rrc.ca/asc Parkinson, Sept. 2013 Revised by D. Earthdancer 2015

http://www.youtube.com/rrcwiseguys http://blogs.rrc.ca/wiseguys Page | 12

12

19. 1.9 mL/dose

20. 2 mL/dose