Question

1. The physician has ordered that 1 gram of Glucophage be given to the patient. How many milligrams will you be giving to the patient?
2. The order reads to administer two teaspoons of guaifenesin to the patient. How many milliliters will you administer?
3. The order reads to administer two tablespoons of Milk of Magnesia to the patient. How many teaspoons will you administer?
4. The patient weighs 71 kg. How many pounds does the patient weigh?
5. The order reads to administer 1 fluid ounce of aluminum hydroxide. How many milliliters will you administer?
6. The physician orders 1 gram of Keflex to be administered in 4 divided daily doses. What is the dosage to be administered in each individual divided dose?
7. The patient is to receive 20 meq of KCL (Potassium Chloride). The solution contains 30 meq per 15 ml. How many milliliters of solution should be given to the patient?
8. The patient weighs 143 pounds. What is the patient’s weight in kilograms?
9. The physician’s order reads to administer Lasix 80 mg PO STAT. You have Lasix 20 mg tablets on hand. How many tablets will you administer to the patient?
10. The pediatric patient weighs 25 kg. What is your patient’s weight in pounds?
11. The physician has ordered Amoxicillin 125 mg PO to be administered to a pediatric patient. You have 250 mg/5ml. How many milliliters will you administer?
12. The physician orders 500 mg of Ampicillin. A 1 g vial of powdered ampicillin is available. The label says to add 4.5 mg of sterile water to yield 1 gram per 5 milliliters. How many milliliters of the drug will you administer?
13. Coumadin 2.5 mg is ordered. You have 5 mg tablets on hand. How many tablets will you give to the patient?
14. The physician orders 650 mgs of Tylenol elixir. You have 325 mg per 5 ml available. How many milliliters will you give to the patient?
15. Levothyroxine sodium 150 mcg is ordered. 75 mcg tablets are available. How many tablets will you administer to this patient?
16. The order reads for Tylenol gr X to be administered. How many milligrams would you administer?
17. How many milligrams of Rocephin are left in a vial containing Rocephin 2 grams after 750 milligrams are removed?
18. The patient is to receive 12 mg of triamcinolone syrup. There are 4 mg/5 ml. How many milliliters would you administer?

A pediatric patient has been ordered on Zithromax daily for an infection. Based on the patient’s weight, the physician has ordered that the patient is to receive 150 mg on the first day and 75 mg on days 2 through 5.

There are 125 mg in 5 ml. Please answer questions 19 and 20 using this information.

19. How many milliliters would be administered on day 1?
20. How many milliliters would be administered on days two through five?

Answer 1

ANSWER.

* Calculation of mg of Glucophage required.

1 gm = 1000 mg.

So

mg of glucophage required = 1000 mg.

* Calculation of volume(ml).

Ordered dose = 2 teaspoon.

1 teaspoon = 5 ml.

So

Volume(ml) of drug required = 2 * 5

= 10 ml.

* Calculation of number of teaspoon.

Ordered dose = 2 tablespoon.

1 tablespoon = 3 teaspoon.

So

Number of teaspoons required = 3 * 2

= 6 teaspoon.

* Calculation of weight of the patient (pounds).

Weight of the patient in kg = 71 kg.

1 kg = 2.205 pound.

So

Weight of the patient in pound = 71 * 2.205

= 156.56 kg.

* Calculation of volume(ml).

1 fluid ounce = 30 ml.

So

Volume(ml) required for administration = 30 ml.

* Dose administered in each individual divided dose.

Ordered dose = 1 gm in 4 divided doses.

Each individual dose required = 1/4

= 0.25 gm per dose.

* Calculation of volume(ml).

Volume(ml) = Desired dose/Dose in hand * Quantity.

Here

Desired dose = 20 mEq.

Dose in hand = 30 mEq.

Quantity = 15 ml.

As per above formula

Volume(ml) = 20/30 * 15

= 0.67 * 15

= 10.05 ml.

* Calculation of patient weight in kg.

Patient weight in pounds = 143 pound.

1 pound = 0.454 kg.

Patient weight in kg = 143 * 0.454

= 64.9 kg.

* Calculation of number of tablets required.

Ordered dose = 80 mg.

Available dose = 20 mg/tablet.

Number of tablets required = Ordered dose/Available dose.

= 80/20

= 4 tablets.

* Calculation of patient weight in pounds.

Patient weight in kg = 25 kg.

1 kg = 2.205 pound.

Patient weight in pound = 25 * 2.205

= 55.1 pound.

* Calculation of volume(ml).

Volume(ml) = Desired dose/Dose in hand * Quantity.

Here

Desired dose = 125 mg.

Dose in hand = 250 mg.

Quantity = 5 ml.

As per above formula

Volume(ml) = 125/250 * 5

= 0.5 * 5

= 2.5 ml.

* Calculation of volume(ml).

Volume(ml) = Desired dose/Dose in hand * Quantity.

Here

Desired dose = 500 mg.

Dose in hand = 1000 mg(1gm).

Quantity = 5 ml.

As per above formula

Volume(ml) = 500/1000 * 5

= 0.5 * 5

= 2.5 ml.

* Calculation of number of tablets required.

Ordered dose = 2.5 mg.

Available dose = 5 mg /tablet.

Number of tablets required = Ordered dose/Available dose.

= 2.5/5

= 0.5 ( Half of a tablet).

* Calculation of volume(ml).

Volume(ml) = Desired dose/Dose in hand * Quantity.

Here

Desired dose = 650 mg.

Dose in hand = 325 mg.

Quantity = 5 ml.

As per above formula

Volume(ml) = 650/325 * 5

= 2 * 5

= 10 ml.

* Calculation of number of tablets required.

Ordered dose = 150 mcg.

Availalble dose = 75 mcg.

Number of tablets required = Ordered dose/Available dose.

= 150/75

= 2 tablets.

* Calculation of mg of drug required.

Ordered dose = gr X.

gr X = 10 grain

1 grain = 64.7 mg.

So

mg of drug required = 10 * 64.7

= 647 mg.

* Calculation of mg of drug remain in the vial.

Total amount(mg) of drug present in the vial = 2000 mg (2 gm).

Amount(mg) of drug removed = 750 mg.

So

Amount(mg) of drug left in the vial = 2000 - 750

= 1250 ml.

* Calculation of volume(ml).

Volume(ml) = Desired dose/Dose in hand * Quantity.

Here

Desired dose = 12 mg.

Dose in hand = 4 mg.

Quantity = 5 ml.

As per above formula

Volume(ml) = 12/4 * 5

= 3 * 5

= 15 ml.

* Calculation of volume(ml) day 1.

Volume(ml) = Desired dose/Dose in hand * Quantity.

Here

Desired dose = 150 mg.

Dose in hand = 125 mg.

Quantity = 5 ml.

As per above formula

Volume(ml) = 150/125 * 5

= 2 * 5

= 10 ml.

Calculation of volume(ml) on days two through five.

Volume(ml) = Desired dose/Dose in hand * Quantity.

Here

Desired dose = 75 mg.

Dose in hand = 125 mg.

Quantity = 5 ml.

As per above formula

Volume(ml) = 75/125 * 5

= 0.6 * 5

= 3 ml on day two through five.