Question

1. Your patient needs 12,000 units of heparin SC. You have on hand 5000 units/mL. How much will you inject? A. 0.4 ml B. 1 mL C. 2 mL D.2.4 mL 2. You have on hand atropine 0.4 mg/mL. You need to administer atropine gr 1/150 IM. How many milliliters will you prepare? A. 0.4 ml B. 1 mL C. 1.4 mL D. 4 mL 3. The physician orders meperidine 75 mg IM every 4 to 6 hours prn for a patient admitted with acute cholecystitis. You have on hand meperidine 50 mg/mL. How much will you give? A. 1 mL B.1.5 mL C.2 mL D. 4 mL 4. A patient is receiving 60 mg of methylprednisolone IM every 8 hours. You have on hand 75 mg/mL. How much will you draw up? A. 1.3 mL B. 1 mL D. 0.4 mL

Answer 1

1.Given

Order:Heparin

Dose:12000 units

Route:SC

Available:5000 units/ml (i.e., 1ml=5000 units)

When 5000units=1ml

Then 12000 units=??ml

Cross multiply and divide

=12000×1÷5000

=12000÷5000

=2.4

Ans:2.4 ml to be injected

2.Given

Order:Atropine

Available:0.4mg/ml

Route:IM

Dose: gr1/150 (0.4mg) to be multiplied by 64.799(1/150×64.799 ,0.006×64.799=0.4)

Therefore the dose is 0.4 mg

As 0.4mg=1ml

Ans:0.1 ml will be prepared

3.Given

Order:Meperidine

Dose:75mg

Route:IM

Frequency:4 _6 hrs, prn

Available:50mg/ml

When 50mg=1ml

Then 75mg=??ml

Cross multiply and divide

=75×1÷50

=75÷50

=1.5ml

Ans:1.5ml to be given

4.Given

Medication:Methylprednisolone

Route:IM

Dose:60mg

Frequency:Thrice a day

Available:75mg/ml

when75mg=1ml

Then 60mg=??ml

Cross multiply and divide

=60×1÷75

=60÷75

=0.8

Ans:0.8ml to be drawn up.