EE Chapter 49 Pharmacy Calculations; Basic calculations Q&A (1 OF 15) Sample Questions
1. A prescription order of antibiotic 30 mg of injection STAT. The antibiotic available as 2.5% inj. In solution. What volume of the solution is needed to fill this order?
- A. 1.2 ml
- B. 12 ml
- C. 30 mL
- D. 25 ml
2.5% = 2500 mg/100 mL = 25 mg/mL
25 mg………..1 ml
(30 mg x 1 ml)/ 25 mg
1. Read the question. Identify and organize the given values. You are asked to solve for the volume.
2. Choose the best strategy to solve it. Before starting to calculate, always make sure that the values are in the same unit. You can use simple proportion to answer this. To answer this problem, you have to express the concentration in weight by volume (as shown from Solutions provided above). Double-check your final answer is in the right unit.
3. Check if you answered the question right. The right match is A.