Chapter 99 Compounding and Reconstitutions Q&A (1 OF 6) Sample Questions
1. A pharmacist has received prescription of hemorrhoids formula consisting of Hydrocortisone, Zinc oxide& Nitroglycerin 0.2%. Mitte 30 g. He will use Nitrol ointment 60 g (Nitroglycerin 2%) to prepare this formula. How much Nitrol® ointment will remain in the tube?
- A. 27 g
- B. 57g
- C. 48g
- D. 75g
Ans:
B
Tips:
Required nitroglycerin is 0.2% in 30 gm
0.2 100
X 30 X= 0.06 g
Amount of nitroglycerin in Nitrol oint.
2 100
X 60 X= 1.2 g
Amount needed from Nitrol oint
1.2 60
0.06 X
X=3 g so amount remaining=60-3= 57g
Required nitroglycerin is 0.2% in 30 gm
0.2 100
X 30 X= 0.06 g
Amount of nitroglycerin in Nitrol oint.
2 100
X 60 X= 1.2 g
Amount needed from Nitrol oint
1.2 60
0.06 X
X=3 g so amount remaining=60-3= 57g