Parenteral Calculations
Practice…
Matching
1.1 Order : Cleocin (clindamycin) 0.3 g IM
q6h
Vial labeled 300 mg/2 ml.
1.2 Order : Vitamin B12 1.5 mg IM daily
Vial labeled 1000 mcg/mL.
A.
1.5 mL
1.3 Order: Heparin 6000 units subcut q12h
Vial labeled 10,000 U/units/mL.
B.
1.2 mL
C.
2 mL
1.4 Order: Benadryl (diphenhydramine) 25
mg IM q4h prn
Vial labeled 50 mg/2 mL.
1.5 Order: Nubain (nalbuphine) HCL 12 mg
IM
Vial labeled 10 mg/mL.
D.
1 mL
E.
0.6 mL
The patient is admitted to the hospital in severe
congestive heart failure. The physician orders
Lasix 80 mg IV push stat followed by 30 mg po
b.i.d. The label reads 40 mg in 4 milliliters.
How many grams of Lasix will you administer?
A. 0.8 g
B. 0.08 g
C. 1.2 g
D. 0.4 g
Morphine sulfate 8 mg subcut daily. The label
reads 10 mg / 2.5 mL. How many milliliters will
you prepare?
A. 1/4 mL
B. 1.5 mL
C. 2 mL
D. 1 mL
The estrogen, DES, has been prescribed for a
patient; 0.5 g IV once a week. The label reads
50 mg/mL. How many milliliters will you
administer to the patient?
A. 0.5 mL
B. 7.5 mL
C. 25 mL
D. 10 mL
The physician has written an order for Vit B12
200 mcg IM stat. The label on the vial reads 1
mg = 1 mL. How many milliliters of the Vit B12
will you administer to the patient?
A. 4 mL
B. 0.4 mL
C. 0.2 mL
D. 2 mL
Esmolol, a beta adrenergic blocker, has been
prescribed, 175 mg IV. The vial reads 250 mg =
10 mL. How many milliliters will you prepare
for this patient?
A. 5 mL
B. 6 mL
C. 8 mL
D. 7 mL
If an ampule of digoxin, a cardiac stimulant, is
labeled 250 mcg = 10 mL, how many
milligrams are in 1 mL?
A. 2.5 mg
B. 0.25 mg
C. 0.025 mg
D. 0.0025 mg
The prescriber ordered 0.1 mg of digoxin I.M
stat. The ampule reads 0.5 mg = 2 mL. How
many mL will you prepare?
A. 0.2 mL
B. 0.4 mL
C. 0.6 mL
D. 0.8 mL
The medication order is for 5 milligrams per
kilogram of ritonavir (Norvir). Read the label in
the figure above, and determine how many
milliliters are contained in this dose if the
patient weighs 48 kilograms? mL
The order is for K-Lor 60 mEq po stat. Read the
label in the figure, and determine the number
of packets you would need. _____packets
Case Study
•
A patient was admitted to the hospital with a diagnosis of type II diabetes Mellitus,
congestive heart failure, hypertension, and a urinary tract infection.
• Her vital signs are as follows: BP, 168/102; P, 92; R, 30; T, 101F. The patient
responded well to her treatment and was discharged with the following orders:
 Visiting nurse qd x 3 with follow-up
 NPH insulin 44 units ac breakfast daily subcut
 Blood glucose levels q6h
 Diabenese 0.2 g b.i.d. po
 Doxazosin 0.004 g daily hs po
 Lasix 60 mg po daily
 K-Lor 30 mEq po daily
 Vistaril 20 mg po IM hs daily prn
 Antivert 0.025 g po q4h prn for nausea
 Zoloft 0.1 g daily po
1.) Lasix is supplied in 20, 40, and 80 mg tablets. Which strength tablets and how many
would you administer to the patient?
2.) You have K-Lor tablets 10 mEq each. How many of these tablets equal the
prescribed dose?
3.) How many tablets of Diabinese will you prepare for this patient if one tablet
contains 100 mg?
4.) How many tablets of Doxazosin will you give to the patient if each tablet contains 2
mg?
5.) Calculate the number of milliliters that equals the prescribed dose of Vistaril if the
label reads, 25 mg per mL.