If an injectable drug contains 25mcg/0.5ml, how many mls will be required to provide a patient with a dose of 0.25mg?
.25mg / 25mg/.5ml = .25mg * .5ml/25mg = .005ml
That's a pretty small syringe!
To determine how many milliliters (ml) of the injectable drug are required to provide a dose of 0.25mg, follow these steps:
Step 1: Understand the given information:
- The injectable drug contains 25mcg (micrograms) per 0.5ml.
- 1mg (milligram) is equal to 1000mcg. So, 0.25mg is equal to 0.25 * 1000mcg = 250mcg.
Step 2: Set up a ratio based on the provided information:
The ratio can be set up as follows:
25mcg / 0.5ml = 250mcg / x ml
Step 3: Cross-multiply and solve for x:
Cross-multiplying the ratio:
25mcg * x ml = 0.5ml * 250mcg
x ml = (0.5ml * 250mcg) / 25mcg
Step 4: Calculate the required number of milliliters (ml):
x ml = (0.5 * 250) / 25
= 5ml
Therefore, to provide a patient with a dose of 0.25mg, you would require 5ml of the injectable drug.