Calculations Practice Chapters 25 & 27
Order Points & Parenteral Doses
1. Zoloft 50 mg
Min/max inventory level: 3/5
On hand: 1
Reorder quantity ____
2. Zithtromax Z-pak
Min/max inventory level: 6/12
On hand: 5
Reorder quantity ____
3. A patient needs 11 million units of a drug in a single dose. The drug is available as 6 million units per
ml in a 3 ml vial. How many ml will the patient receive?
4. Tobramycin injection is available in a concentration of 80 mg per 2 ml. The patient received 1.5 ml
in 100 ml of normal saline. What was the dose in mg that the patient received?
5. Clonidine injection is available as 10 ml vials containing 100mcg/ml. A patient order is for 0.2mg
daily in 2 equal doses. How many ml will be needed for each dose?
6. A 500 ml TPN needs the addition of 33 mEq of sodium chloride. The label on the vial of
concentrated sodium chloride injection has the following information: 30 ml single dose, 234
mg/ml, 4 mEq, and 23.4%. How many ml should be added to the TPN bag?
7. A patient order is for digoxin 0.54 mg. The injection solution is available as 250 mcg per ml. How
many ml will be needed to fill the order?
8. Regular insulin is ordered for an obese patient. The drug is available in 10 ml vials containing 1,000
units. The initial dose for the patient is 108 units in four equal doses. How many ml will be given in
a single dose?
9. Cleocin IV comes as 600mg/4ml. How many ml are needed to make a piggy-back of 750mg in 100ml
of 0.9% sodium chloride injection?
10. A physician orders 25 mg of theophylline to be given orally to a pediatric patient. If the elixir of
theophylline contains 80 mg per tablespoonful, how many ml of the elixir should be administered?
11. The doctor orders Garamycin 70mg. A 2ml vial contains 40 mg/ml. How many ml should be
dispensed?
12. How many ml of aminophyllin solution (500mg/20ml) is needed to prepare 350 mg aminophyllin in
100ml D5W?
13. A patient requires potassium chloride 7mEq in a 1,000 ml bag of Lactated Ringer’s solution. The
pharmacy has on hand potassium chloride for injection 40 mEq in 20 ml vials. How many ml will be
needed in the IV bag?
14. 500 ml of D5W with 8,000 units of heparin is ordered for a patient. A 5ml vial of Heparin contains
10,000 units per ml. How many ml are needed for this patient?
15. An Injectable medication is available as 2 mg/ml in 1 ml and 10 ml vials. The patient order is for
0.5mg in 50ml NS IVPB t.i.d. What is the total amount in ml of drug that the patient will receive per
day?
16. A patient is ordered Novolin R 54 units. The Novolin R available is 1,000 units in a 10 ml vial. How
many ml will the patient require?
17. Digoxin injection is available in a concentration of 0.5 mg in a 2 ml vial. The physician orders a 150
mcg dose in 150 ml of D5W. How many ml will the patient need?
18. A patient needs a 1 g dose of streptomycin. The drug is available in a 2.5 ml vial, concentration
400mg/ml. How many ml does the patient need?
19. Morphine sulfate 8 mg is ordered by the physician. The label on the morphine sulfate vial reads 15
mg (1 ml fill in 2 ml size). How many ml will the patient receive?
20. Droperidol is available as a 2.5 mg/ml injection. A patient needs a 4 mg slow IV push. How many ml
are used?
Answers:
1. 4 (#10, pg 196)
2. 7 (#11, pg 196)
3. 1.8 ml (#28, pg 216)
4. 60 mg (#33, pg 216)
5. 1 ml (#24, pg 215)
6. 8.25 ml (#31, pg 216)
7. 2.16 ml (#41, pg 217)
8. 0.27 ml (#44, pg 218)
9. 5 ml (#20, pg 214)
10. 4.69 ml (#8, pg 212)
11. 1.75 ml (#11, pg 213)
12. 14 ml (#17, pg 214)
13. 3.5 ml (#37, pg 217)
14. 0.8 ml (#40, pg 217)
15. 0.75 ml (#42, pg 218)
16. 0.54 ml (#38, pg 217)
17. 0.6 ml (#32, pg 216)
18. 2.5 ml (#30, pg 216)
19. 0.53 ml (#35, pg 217)
20. 1.6 ml (#26, pg 215)