Question

If the dose of a medication is 5cc qd, how many days of medication is 120cc?

Drug B is a PO medication that comes from the pharmacy as 50mg/5ml. If the dose is 70 mg, how many milliliters is given?  

The pharmacy has prepared a solution of 50 units of Drug A in 500 ml of normal saline. At what rate should you set the pump in ml per hour to infuse 10 units of Drug A per hour?

Answer 1

1) ▪︎Given :

1. Dose of Medication : 5cc qd. (Means 4 times in a day we have taken 5cc medication each . Means total medication in a day = 4×5cc = 20 cc )

▪︎To Find :

No. of days when total dose will be 120 cc

▪︎solution :

As the total dose in one day is 20cc.

No. of days when total dose will be 120 cc = 120/20

= 6 days

□ Ans : Therefore 6 days of medication is 120 cc

2) ▪︎Given :

Dose of Medication that pharmacy have : 50mg/5ml . ( I.e. 50 mg of Drug B is present in 5 ml of solution )

▪︎To find :

Milliliter of Medication required if 70 mg of drug dose is prescribed

▪︎Solution:

Let's find , how much solution is there for 1 mg of drug :

i.e 5/50 = 0.1 ml   
therefore 1 mg drug is present in 0.1 ml solution

Then let's find , how much solution is required for 70 mg:

i.e 0.1 × 70 = 7 ml

□ Ans : Therefore , 7 ml of drug is given for the dose of 70 mg .

3) ▪︎Given :

1. Solution which is prepared by pharmacy: 50 units in 500 ml normal saline

▪︎To find :

Rate of pump to be set in ml/hr to infuse 10 units of Drug A per hour

▪︎Solution:

As 50 units of Drug A is present in 500 ml of normal saline

I.e. 10 units of drug should be present in 100 ml of normal saline ( by cross multiplication)

we have to infuse 10 units of Drug in one hour I.e. 100 ml , which contains 10 units.

□ Ans : Therefore rate of infusion should be 100 ml per hour , to fulfill the need of 10 units of Drug A in one hour .