Question

Cimetidine HCL 200 mg Po daily divided into 2 doses is ordered. The pharmacy sends cimetidine

oral solution 200 mg/5 ml. How many ml per dose will the nurse give?

Answer 1

To determine the volume per dose for Cimetidine HCL when given a solution concentration, divide the total daily dosage by the number of doses and use the concentration to find the volume. In this case, each dose will be 2.5 ml of the 200 mg/5 ml solution.

Step-by-step explanation:

The question involves calculating the appropriate volume of a medication solution to administer based on the given concentration. Since the order is for Cimetidine HCL 200 mg to be taken daily in divided doses (specifically, two doses), we must calculate the volume for each dose.

The pharmacy provides Cimetidine in an oral solution with a concentration of 200 mg per 5 ml. Since the total daily dosage is 200 mg and this needs to be divided into two doses, each dose would be 100 mg. Using the concentration provided:
200 mg in solution corresponds to 5 ml of the solution. Therefore, for a dose of 100 mg, we would have half the volume (because 100 mg is half of 200 mg), which is 2.5 ml per dose.

Step-by-step calculation:

1. 
   
3. Identify the total daily dosage needed: 200 mg.
4. 
   
6. Divide this by the number of doses per day: 200 mg / 2 doses = 100 mg per dose.
7. 
   
9. Determine the volume of solution that contains 100 mg using the given concentration: since 200 mg corresponds to 5 ml, for 100 mg, we need half of 5 ml, which is 2.5 ml.