Question

1. The doctor has ordered 250 mg of liquid medication and the medication is supplied as 100 mg/5 mL. The nurse will administer _____ mL.

2. The doctor has ordered 100 mcg of a medication and the medication is supplied as 0.05 mg scored tablets. The nurse will administer _____ tablet(s)

Answer 1

1) The prescribed dose = 250 mg

Dosage available = 100 mg / 5 ml

Let x be the required ml of medicine to administer.

Given that 5 ml contain 100 mg of medicine .

5 ml = 100 mg (1)

Then for 250 mg of medicine x ml be required

X ml = 250 mg (2)

Cross multiply equation 1 & 2

That is

X × 100 = 250 × 5

X = 250×5 / 100

X= 25×5 / 10

X= 12.5 ml

Therefore 12.5 ml should be given to the patient.

1) The prescribed dose = 100 mcg

Dosage available = 0.05 mg

Convert 0.05 mg to mcg

1 mg = 1000 mcg

Then 0.05 mg gives

0.05 ×1000 = 50 mcg

Let x be the required number of tablet to administer.

Given that 1 tablet contains 50 mcg

1 tablet =50 mcg (1)

Then x be the required number of tablet

Required number of tablet = prescribed dose/ available dose

Then x = 100 mcg/ 50 mcg

X= 2

Therefore 2 tablet is required.