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Q3. The physician order reads “Administer Acetaminophen 625 mg PO QID prn headache or fever." The medication is available as an elixir of 250 mg/ 5 mL. What is the maximum amount (in mL) the nurse might administer to this client in one day?

Q4. A neonate weighs 10 pounds 2 oz. The physician order reads “Administer Claforan IV 225 mg/kg/day in divided doses BID." What is the dose (in mg) the nurse should administer in one dose? Calculate to the 100th decimal.

Q5. The child weighs 38 lbs. The physician order reads “Administer Ampicillin 300 mg PO every 8 hours”.   The safe therapeutic dose range is 50 - 100 mg/kg/day.  What is the safe therapeutic dosage range (in mg) for one dose? Calculate to the 100th decimal.

Answer 1

3rd Answer: 625 mg needs to be given orally 4 times a day, so total dosage per day - 2500mg

5ml - 250mg

? - 2500mg

= 2500 X 5 / 250

= 50ml is the maximum amount in ml

4th Answer: 10 pounds 2oz = 4.591 kgs (baby's weight)

225mg for 1 kg weight

?mg for 4.591kgs

=4.591 X 225mg / 1kg

=1032.975 mg (total dose per day)

since the medication needs to be administered BD

= 1032.975 / 2

= 516.4875 mg per dose

5th Answer: 38lbs = 17.2365kgs

The safe therapeutic dose range is 50 - 100 mg/kg/day.

50mg / kg / day

The patient weighs 17.2365kg

Minimum dosage per day = 17.2365 X 50

= 861.825 mg

Maximum dosage per day = 17.2365 X100

=1723.65 mg

So, the safe therapeutic dosage range can vary from  = 861.825 / 3 to  1723.65 / 3 (since is given three times a day)

= 287.275mg - 574.55mg per dosage