Georgia Baptist College of Nursing

Georgia Baptist College of Nursing

Of Mercer University

Learning Resources Center

Practice Medication Calculation Quiz #4

ANSWER KEY

1.  Jennifer, weight 12 kg, has been prescribed Medication BBB TID. The recommended dosage for a child her age is 15/kg/day.

How many mg of Medication BBB will Jennifer receive per day?

weight= 12 kg 15 mg X 12 kg = 180 mg / day

2.  Christopher, weight 10 kg, has been prescribed Medication JJJ QID. The recommended dosage for a child his age is 20 mg/kg/day.

How many mg of Medication JJJ will Christopher receive per dose?

weight = 10 kg 20 mg X 10 kg = 200 mg / day to be given QID therefore →

200 mg / day ÷ 4 = 50 mg / dose

3.  Ashleigh, weight 5 kg, has Medication EEE prescribed BID. The recommended dosage for a child her age is 12 mg/kg/day. Determine the number of ml that Ashleigh should receive at each dose if the medication is supplied as a 10 mg per 2 ml solution.

weight = 5 kg 12 mg X 5 kg = 60 mg / day Given BID therefore →

60 mg / day ÷ 2 = 30 mg / dose

ml = 2 ml | | 30 mg = 60 = 6 ml

10mg | | ml 10

30 mg = 10mg 10x = 60 x = 60 x = 6 ml

x 2 ml 10

4.  Brandon, weight 10 kg, has Medication RRR ordered TID. The recommended dosage for a child his age is 15 mg/kg/day. How many ml will Brandon receive at each dose if the medication is supplied as a 5 mg per ml solution?

weight = 10kg 15 mg X 10 kg = 150 mg / day To be given TID therefore→

150 ÷ 3 = 50 mg / dose

ml = 1 ml | | 50 mg = 50 = 10 ml

5 mg | | ml 5

50 mg = 5 mg 5x = 50 x = 50 x = 10 ml

x 1 ml 5

5.  Alexandra, weight 20 kg, has Medication AAA ordered daily. The recommended dosage is 5 mg/kg/day. How many ml will Alexandra receive at each dose if the medication is supplied as a 50 mg per ml solution?

weight = 20 kg 5 mg X 20 kg = 100 mg /day Given once a day → 100 mg /day

ml = 1 ml | | 100 mg = 100 = 2 ml

50 mg | | ml 50

100mg = 50 mg 50x = 100 x = 100 x = 2 ml

x 1 ml 50

6.  The physician has ordered Medication ZZZ 1.5 G now. The medication is supplied as 1,000 mg per tablet. How many tablet(s) will you administer?

tab = 1 tab | 1000mg | 1.5 G = 1500 = 1.5 tab

1000mg | 1 G | tab 1000

1.5 G = 1500 mg

1500 mg = 1000 mg 1000x = 1500 x = 1500 x = 1.5 tab

x 1 tab 1000

7. Ordered: ASA gr V PO once a day

Available: ASA 100 mg per tablet

Administer: _____ tablet(s)

tab = 1 tab | 60 mg | gr V = 300 = 3 tab

100 mg | 1 gr | tab 100

1 gr = 60 mg → 5 gr = 5 X 60 = 300 mg

300 mg = 100 mg 100x = 300 x = 300 x = 3 tab

x 1 tab 100

8. Codeine gr 1/4 is ordered to be given IM q 4-6 h prn. A 5 mg per ml single dose unit is provided. How many ml contain the prescribed dose?

ml = 1 ml | 60 mg | gr ¼ = 15 = 3 ml

5mg | 1 gr | ml 5

gr ¼ = 15 mg

15 mg = 5 mg 5x = 15 x = 15 x = 3 ml

x 1 ml 5

9. Ordered: Penicillin G 700,000 u IM q 12h

Available: Penicillin G 600,000 u per ml

Administer: ______ml per dose

ml = 1 ml | | 700,000 u = 700,000 = 1.16 = 1.2 ml

600,000 u | | ml 600,000

700,000 u = 600,000 u 600,000x = 700,000 x = 700,000 x = 1.16 x = 1.2 ml

x 1 ml 600,000

10.  Heparin sodium 5,000 u SQ [subcutaneous] has been ordered. The medication is supplied in a vial containing 10,000 u per ml. How many ml should be administered at each dose?

ml = 1 ml | | 5,000u = 5,000 = 0.5 ml

10,000 u | | ml 10,000

5,000u = 10,000u 10,000x = 5,000 x = 5,000 x = 0.5 ml

x 1 ml 10,000

11. Ordered: Potassium chloride 10 mEq PO every am

Available: Potassium chloride 20 mEq per 15 ml

Administer: _____ ml

ml = 15 ml | | 10 mEq = 150 = 7.5ml

20 mEq | | ml 20

10 mEq = 20 mEq 20x = 150 x = 150 x = 7.5 ml

x 15 ml 20

12.  150 u of drug MMM has been prescribed. The medication is supplied in a vial in dry form (500 u per vial). The directions read: "Add 5.6 ml of sterile saline to obtain a solution which contains 50 u per ml." When mixed as directed, ______ml would contain the ordered dose.

ml = 1 ml | | 150 u = 150 = 3 ml

50 u | | ml 50

150 u = 50 u 50x = 150 x = 150 x = 3 ml

x 1 ml 50

13.  250 u of Drug QQQ has been ordered. The medication is supplied in a vial in a dry form (1,000 u per vial). The directions read: "Add 9.6 ml of sterile saline to

obtain a solution which contains 200 u per ml." When mixed as directed, ____ ml would contain the prescribed dose.

ml = 1 ml | | 250 u = 250 = 1.25 = 1.3 ml

200 u | | ml 200

250U = 200 u 200x = 250 x = 250 x = 1.25 x = 1.3ml

x 1 ml 200

14. Order: Oxacillin 300 mg IM q 6h

Available: Oxacillin 3 G per ml

Administer: ___ ml

ml = 1 ml | 1 G | 300 mg = 300 = 0.1 ml

3 G | 1000 mg | ml 3000

1 G = 1000 mg 3 G = 3 X 1000 = 3000mg

300 mg = 3000mg 3000x = 300 x = 300 x = 0.1 ml

x 1 ml 3000

15. Order: Ancef 500 mg IM q 8h

Available: Ancef 2 G per ml

Administer: ____ ml

ml = 1 ml | 1 G | 500 mg = 500 = 0.25 ml

2 G | 1000mg | ml 2000

1 G = 1000 mg 2 G = 2 X 1000 = 2000 mg

500 mg = 2000mg 2000x = 500 x = 500 x = 0.25 ml

x 1 ml 2000

16. Order: Nafcillin 500 mg IM q 6h

Available: Nafcillin 250 mg per 2 ml

How many ml will you administer?

ml = 2 ml | | 500 mg = 1000 = 4 ml

250 mg | | ml 250

500 mg = 250 mg 250x = 1000 x = 1000 x = 4 ml

x 2 ml 250

17. Order: Amoxicillin 500 mg PO q 6h

Available: Amoxicillin 1.5 G per 3 ml

How many ml will you administer?

ml = 3 ml | 1 G | 500 mg = 1500 = 1 ml

1.5 G | 1000 mg | ml 1500

1 G = 1000 mg 1.5 G = 1.5 X 1000 = 1500 mg

500 mg = 1500 mg 1500 x = 1500 x = 1500 x = 1 ml

x 3 ml 1500

18. Order: Streptomycin 0.5 G IM q 6h

Available: Streptomycin 1 G per 15 ml

Administer: ____ ml

ml = 15 ml | | 0.5 G = 7.5 = 7.5 ml

1 G | | ml 1

0.5 G = 1 G 1x = 7.5 x = 7.5 x = 7.5

x 15 ml 1

19. Order: Cefotaxime 750 mg IM q8h

Available: Cefotaxime 1 G per 1 ml

Administer: ____ ml

ml = 1 ml | 1 G | 750 mg = 750 = 0.75 ml

1 G | 1000 mg | ml 1000

1 G = 1000 mg

750 mg = 1000mg 1000x = 750 x = 750 x = 0.75 ml

x 1 ml 1000

20. Order: Suprax 400 mg PO once a day

Available: Suprax 200 mg per ml

Administer: ____ml

ml = 1 ml | | 400 mg = 400 = 2 ml

200 mg | | ml 200

400 mg = 200 mg 200x = 400 x = 400 x = 2ml

x 1 ml 200

BE SURE TO ALSO KNOW YOUR CONVERSIONS FOR OUNCES, TEASPOONS AND TABLESPOONS!!

Rev./5/06/FEK