Question

1. Your patient weighing 44 lbs has an order for Tylenol (acetaminophen) 325 mg stat. The recommendations for acetaminophen is 10 - 15 mg/kg/dose. Tylenol solution is available is 160mg per teaspoon. A. Is this ordered dose safe? B. How many mls would you give 2. A child has an order for ibuprofen 185 mg orally prn q6h. Ibuprofen solution is available as 100 mg tsp. How many ml do you need for this dose? 3. A client weighing 110 lbs. is to receive a drug at the dosage of 2.5 mg/kg of bodyweight. How many mg of the drug will the client receive? 4. The physician ordered: 15 mEq of potassium chloride Available: 5 mEq/10 ml How many teaspoons should be given? 5. The physician prescribed 4 mg IM of a medication. The medication is available as a powder in a 50 mg vial. Reconstitute it with 5.0 ml of water. Solution concentration yields 10 mg per mL. How many mLs do you give 6. The medication ordered is 0.5 gm of amoxicillin. Available is 250 mg/tablet How many tablets should be given? 7. Liquid digoxin is available as 0.05mg/ml. How much would you need for a dose of 36 meg? 8. Potassium chloride 20 mEq is prescribed. It is available as 10 mEq per tablet. How many tablets should the nurse give? 9. Amoxicillin (Amoxil) 0.25 G, PO, three times daily Drug available: Amoxil 125 mg/5 ml how many ml will be given for each dose? Then how many total mls will be given for the entire day 10. Order: Tazicef (ceftazidime) 500 mg IM Stat Drug available: Tazicef 1 g in a vial. The label states to add 3 mL of sterile water in which when reconstituted the concentration will be lg-3.6 mL How many mls will be given ?

Answer 1

1) Patient weight = 44 lbs

Ordered dose = 325 mg stat

Recommended dose of Tylenol = 10 - 15 mg/ kg/ dose or 10-15 mg/2.2lbs/ dose ( 1 kg= 2.2 lbs)

Available dose = 160 mg / teaspoon or 160 mg/ 5 ml ( 1 teaspoon= 5 ml)

A)Calculation of safe dose:-

By proportion method :-

10mg : 2.2 lbs :: X : 44 lbs ( using lower limit of recommended dose)

X = (10mg × 44 lbs) / 2.2lbs = 200 mg

15 mg: 2.2 lbs:: X : 44 lbs ( using upper limit of recommended dose)

X =( 15mg × 44 lbs)/ 2.2 lbs = 300 mg

Safe range is 200- 300 mg/ kg or 2.2 lbs/ dose

Yes, this order dose is safe.

B) By proportion method:-

160mg : 5 ml :325 mg : X ml

X = (325 mg× 5ml ) / 160 mg = 10.15 ml

Hence, 10.15 ml would be given.

2) Ordered dose = 185 mg

Available dose= 100 mg / tsp or 100 mg/ 5 ml ( 1tsp= 5 ml)

By proportion method:-

100 mg: 5 ml :: 185 mg : X ml

X = ( 185 mg × 5 ml)/ 100 mg

X = 9.25 ml

Hence, 9.25 ml will be needed.

3) Client weight = 110 lbs

Ordered dose = 2.5 mg/ kg or 2.5 mg/ 2.2 lbs

Let X mg of drug client will receive.

By proportion method:-

2.5 mg: 2.2 lbs : X mg : 110 lbs

X = ( 2.5 mg × 110 lbs)/ 2.2 lbs

X = 125 mg

4) Ordered dose = 15 mEq of Kcl

Available dose= 5 mEq/ 10 ml or 5 mEq/ 2 teaspoons ( 5 ml= 1 tsp)

By proportion method:-

5 mEq: 2 tsp::15 mEq: X teaspoons

X = (15mEq × 2 teaspoons)/ 5 mEq

X = 6 teaspoons

5) Ordered dose = 4 mg IM

Available dose in powder form = 50 mg

After reconstruction , available dose= 50mg/ 5 ml

By proportion method:-

50mg : 5 ml:: 4 mg : X ml

X = ( 4 mg X 5 ml)/ 50 mg

X = 0.4 ml