Question

Dr. Lee has ordered 75 mg. of Retrovir (AZT) p.o. qd for Jimmy, a newly diagnosed AIDS patient. The AZT on hand is 50 mg/ 5 ml. How many ml will you need to give to Jimmy?

Answer 1

To administer the prescribed dose of 75 mg of Retrovir (AZT) for Jimmy, an AIDS patient, when the AZT concentration is 50 mg per 5 ml, one would need to give 7.5 ml of AZT.

Step-by-step explanation:

The student needs to calculate the amount of Retrovir (AZT) in milliliters for an AIDS patient. Dr. Lee has prescribed 75 mg of AZT to be taken orally, once per day (qd). The available AZT concentration is 50 mg/5 ml. To find out how many milliliters will be administered to Jimmy, we set up a proportion using the information given:
75 mg (desired dose) : X ml (unknown quantity) :: 50 mg (available dose) : 5 ml (available quantity)
To solve for X, we cross-multiply and divide:
(75 mg * 5 ml) / 50 mg = X ml
Which simplifies to:
(375 mg*ml) / 50 mg = X ml
X = 7.5 ml
So, you would need to give Jimmy 7.5 ml of the AZT solution.