1. Doctor orders digoxin 0.92 mg daily for a child that weighs 16 lbs. The safe dosage for this medication is 8-12 mcg/kg/day. Is this a safe dosage for this child/ explain
2. Doctor orders Amoxicillin 500mg PO BID times 10 days for infection. Available is Amoxicillin 250 mg/10ml.
How many ml should the nurse give
3. A child weighs 100 lbs.The child has a bacteria infection and the doctor orders penicillin I gram stat. Available penicillin is 500 mg/ml. Ho many ml should the nurse give?
4. Order: Acetaminophen elixir 15 mg/kg po. Child weight is 15 pounds. Available Acetaminophen elixir is 100 mg/5ml. How many ml will you administer?
ANSWER.
1) Safe dose for the child.
Ordered dose = 0.92 mg.
Weight of the child = 16 lbs .
Convert lbs to kg for calculation.
1 lbs = 0.45 kg.
So
Weight of the child = 16 * 0.45
= 7.2 kg.
Here
Safe dosage for this medication = 8-12 mcg/kg/day.
Convert mcg value to mg for calculation
1 mcg = 0.001 mg.
So
Safe dose for this medication = 0.008 mg to 0.012 mg.
Safe dose for this child with 7.2 kg body weight = 0.008 * 7.2 - 0.012 * 7.2
= 0.06mg to 0.09mg / day.
* Ordered dose (0.92) is more than safe dose so it is not safe for this child.
2) Calculation of amount(ml) of drug required.
Formula = Desired dose/Dose in hand *Quantity.
Here
Desired dose(D) = 500 mg.
Dose in hand (H) = 250 mg.
Quantity (Q) = 10 ml.
As per formula
Amount(ml) of drug required = 500/250 * 10
= 2 * 10
= 20 ml.
3) Calculation of amount(ml) of drug required.
Formula = Desired dose /Dose in hand * Quantity.
Here
Desired dose (D) = 1 gm.
Convert gm value to mg for calculation
1gm = 1000 mg.
So
Desired dose(D) = 1000 mg.
Dose in hand (H) = 500 mg.
Quantity(Q) = 1 ml.
As per formula
Amount(ml) of drug required = D/H * Q
= 1000/500 * 1
= 2 * 1
= 2 ml.
4) Calculation of amount of drug required.
Formula = Desired dose /Dose in hand * Quantity.
Here
Ordered dose = 15 mg/kg.
Child weight = 15 lbs.
Convert lbs value to kg for calculation
1 lb = 0.45 kg.
Child weight = 15 * 0.45
= 6.8 kg.
Desired dose (D) = 15 * 6.8
= 102 mg.
Dose in hand (H) = 100 mg.
Quantity(Q) = 5 ml.
As per formula
Amount(ml) of drug required = D/H * Q
= 102/100 * 5
= 1.02 * 5
= 5.1 ml.
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