(1)
Find the dose for the patient in milligrams:
5 mg
X mg
1 kg (2.2 lbs) =
110 lbs
2.2X
=
550
X =
550
2.2
X =
250 mg per dose
NOTE: 1 kg
was changed to
2.2 lbs. so
that corresponding units of
the proportion are
the same. See lesson 1, para 1-40.
(2)
Find the number of tablets to be dispensed per day:
1 tab =
X tab
50 mg
250 mg
50 X
=
250
X =
5 tablets per day
(3)
Times 10 days:
10 x 5 tablets = 50 tablets required for a ten day regimen.
b. Meperidine HCl (Demerol) is a synthetic narcotic analgesic having a
recommended dose of 6 mg/kg/24 hours for pain and is given in divided doses at four
to six hour intervals. The maximum single dose is 100 mg. How many milliliters of
Demerol injection (50 mg/ml) should be administered to a 33-pound child, who is
suffering the pain of a broken leg, as a single dose every six hours?
(1)
Find the daily dose in milligrams:
6 mg
= X mg
1 Kg (2.2 lbs) 33 lbs
2.2 X = 198
X = 198
2.2
X = 90 mg of Demerol per day
MD0802
3-3