The doctor writes a prescription for aminophylline 125mg po qid x 10 days.
You only stock the 250mg/5ml strength. How many teaspoons would be
needed for one dose? How many mls would be needed to fill the entire
prescription?
2.5 ml
Please check your 1-6-11,11:24pm post.
10
To determine how many teaspoons would be needed for one dose, we need to calculate the dosage using the available strength of 250mg/5ml.
First, we need to find out how many milligrams of aminophylline are needed for one dose. The prescribed dose is 125mg, so we divide that by the available strength of 250mg/5ml:
125mg / 250mg/5ml = 0.5ml
So, one dose of aminophylline would require 0.5ml.
To determine how many milliliters would be needed to fill the entire prescription, we need to calculate the total amount of medication needed for the entire duration of 10 days.
The prescribed dose is 125mg qid (four times a day), so we multiply that by the number of days (10) and the available strength (250mg/5ml):
125mg x 4 times a day x 10 days = 5000mg
To convert milligrams to milliliters, we need to know the concentration of the available strength. In this case, we know that the available strength is 250mg/5ml.
Following the ratio, we set up a proportion:
250mg/5ml = 5000mg/xml
Cross-multiplying, we get:
250mg * x = 5000mg * 5ml
Simplifying further:
250x = 25000
x = 25000 / 250
x = 100
Therefore, to fill the entire prescription, you would need 100 milliliters (ml) of aminophylline.
In summary:
- One dose of aminophylline would require 0.5ml (or approximately 1/10th of a teaspoon).
- To fill the entire prescription, you would need 100 milliliters (ml) of aminophylline.