Question

2. A prescriptions calls for Promethazine 7.5ml PO, TID, 21 days-How many total milliliters are needed to fill the prescription? Please convert to ounces? 3. Amoxicillin prescription is written for 2.5ml.PO,QID, QTY Dispense is 200ml, How many day will the therapy last based on the quantity? 4. An IV order requires 20 mg of NaCl-In stock only NaCl 5mg/2ml is available. How many ml is required to prepare the IV based on strength available? 5. KCl is available as 25Meq/2ml. How many milliliters are needed to prepare 4.5Meq order?

Answer 1

2).Order is 7.5ml.per oral for tid 21 days.

21x 3times =63 times the patient has to take.

1 time he gets 7.5ml. So, for 63 times he should get 7.5 x 63 = 472.5 = 473 ml he should get in total.

1 ounce = 30 ml

so, let us consider x ounce = 473ml.= 473/30 =15.76 = 16 ounces.

3).order is 2.5ml

dispense is 200 ml

since 2.5 ml to be given for 4 times a day. the total dose a patient gets is 2.5 x 4 = 10 ml per day.

So, for x days = 200ml

x= 200ml/10ml= 20 days.

4)doctors order = 20mg

stock in hand= 5mg/2ml

dosage= 20x 2/5= 8ml.

So. 8ml is required to give the ordered dose.

5) doctors order = 4.5 meq

stock = 2.5/2ml

dosage = 4.5 x 2/2.5 = 3.6ml

So, 3.6ml is available to prepare the required dosage.