NOTE:
Round parenteral medications to the tenth, except for heparin and insulin,
which are rounded to the hundredth.
PRACTICE:
The order is to give morphine sulfate gr 1/8 I.M. q 4h
p.r.n. for pain. On hand are ampules labeled 10 mg per
ml. How much medication should you give?
SOLUTION:
1
10 mg = 8 gr
1 ml
X ml
60 mg = X mg
1 gr
1 gr
8
X = 7.5 mg
10 mg = 7.5 mg
1 ml
X ml
10X = 7.5
X = .75 = .8 ml
PRACTICE: The order is to give 0.3 mg of atropine I.M. on call to surgery. The
medication is stocked in a vial labeled gr 1/150 per ml. How much
medication should you give?
SOLUTION:
gr 1/150 = 0.3 mg
1 ml
X ml
60 mg
X mg
=
gr 1
gr 1/150
X = .4 mg
.4 mg = 0.3 mg
1 ml
X ml
.4 X = 0.3
X = .75 = .8 ml
PRACTICE: The physician orders Gentamicin 60 mg I.M. q 8h. The
vial is labeled 80 mg per 2 ml. How much medication
should you give?
MD0904
2-30