Final answer:
The safe dose range per dose for Ibuprofen for a child weighing 49 lbs. is 111.4 mg to 222.7 mg. The child's weight must be converted to kilograms to calculate this range. The prescribed 150mg dose falls within this safe range.
Step-by-step explanation:
The doctor has ordered 150mg of Ibuprofen every 6 hours for a child weighing 49 lbs., and we need to find out if this falls within the safe dose range for the medication. First, we must convert the child's weight from pounds to kilograms since the safe dose range is given in mg/kg.
Conversion: There are approximately 2.2 lbs. per kilogram. So, 49 lbs. × (1 kg / 2.2 lbs.) = 22.27 kg (rounded to the nearest hundredth).
Next, we will calculate the safe dose range per dose:
- Minimum safe dose: 5 mg/kg × 22.27 kg = 111.35 mg
- Maximum safe dose: 10 mg/kg × 22.27 kg = 222.7 mg
Now, we round the calculated doses to the nearest tenth, as the question specifies:
- Minimum safe dose (rounded): 111.4 mg.
- Maximum safe dose (rounded): 222.7 mg.
Therefore, the safe dose range per dose for a child weighing 49 lbs. is 111.4 mg to 222.7 mg, in tenths.
The doctor's order of 150mg fits within the calculated safe dose range, which is between 111.4 mg and 222.7 mg per dose.