A prescription is brought in for 300 g of 5% coal tar ointment. The pharmacy has in stock 3% coal tar ointment and coal tar.

What is the total desired quantity of the new product?

a. 300 grains

b. 300 %

c. 300 grams

What strengths of coal tar does the pharmacy have in stock?

a. 5%, 100%

b. 3%, 100%

c. 3%, 5%

What is the desired strength of the requested new preparation?

a. 3%

b. 5%

c. 100%

The pharmacy receives an order for 76% Isopropyl Alcohol, 1L. In stock, the pharmacy has 91% Isopropyl Alcohol, 70% Isopropyl Alcohol, 50% Isopropyl Alcohol, and Distilled Water.

Steps:

What is the desired strength of the new product?

a. 50%

b. 70%

c. 76%

d. 91%

What strengths of isopropyl alcohol does the pharmacy have in stock?

a. 70%, 76%, 91%

b. 50%, 70%, 76%

c. 50%, 76%, 91%

d. 50%, 70%, 91%

What is the desired quantity of the requested new preparation?

a. 1L

b. 1kL

c. 1dL

d. 1gal

A prescription for Ammoniated Mercury Ointment 7%, 450g, with a signa of apply ud bid, is received at your pharmacy. The pharmacy only has 3% and 10% Ammoniated Mercury available. Using alligation, calculate the amount of each available product needed to prepare this prescription.

a. 192.86g of 10% and 257.14g of 3%

b. 225g of 10% and 225g of 3%

c. 257.14g of 10% and 192.86g of 3%

d. 200g of 10% and 250g of 3%

A pharmacy receives a prescription for Coal Tar 4.5% Gel, 2 ounces. The signa reads Apply to nose UD for seborrheic dermatitis. In stock, the pharmacy has coal tar and clear gel-base. How many grams of each are needed to prepare this prescription?

a. 37g of Coal Tar and 23g of Clear gel base

b. 23g of Coal Tar and 37g of Clear gel base

c. 57.3g of Coal Tar and 2.7g of Clear gel base

d. 2.7g of Coal Tar and 57.3g of Clear gel base

A pharmacy receives a medication order for an IV of lactated ringers with 16% Sodium Chloride. It is to be administered at 125mL/hr at 60gtts/min. In stock, the pharmacy has a 1 L bag of D₅W and 500mL of 23.4% Concentrated Sodium Chloride. How many milliliters of each are needed to prepare this order?

a. 316.2mL of 23.4% sodium chloride and 683.8mL of Dextrose 5%

b. 683.8mL of 23.4% sodium chloride and 316.2mL of Dextrose 5%

c. 600mL of 23.4% sodium chloride and 400mL of Dextrose 5%

d. 400mL of 23.4% sodium chloride and 600mL of Dextrose 5%

Now that you have completed the practice problems,please take the time to review your answers and steps for each problem. Please click here to view/print the document to check your answers.

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Now that you have completed the practice problems,please take the time to complete some mastery problems. Please click here to view/print the document to check your answers.

Mastery Problems

MASTERY PROBLEM 1
How many milliliters of normal saline, a diluent, must be added to one fluid ounce of 1% Phenylephrine HCl solution to reduce the strength to 0.67%?

MASTERY PROBLEM 2
How many milliliters of water should be added to 6 gallons of 91% Isopropyl Alcohol to create a diluted 70% Isopropyl Alcohol?

MASTERY PROBLEM 3
How many grams of cream base must be added to 1% pimecrolimus cream to make 1 pound of a 0.75% ointment?

MASTERY PROBLEM 4
The pharmacy receives an order for 0.5L of D10W. Using D5W and D50W.  How many milliliters of each will be needed to prepare this order?

MASTERY PROBLEM 5
How many milliliters of distilled water must be added to a 5% solution of potassium chloride to make one and a half liters of a 0.2% solution?

MASTERY PROBLEM 6
How many grams of coal tar should be added to 6 pounds of 20% coal tar ointment to prepare an ointment containing 40% coal tar?

MASTERY PROBLEM 7
Prepare one pint of 12% dextrose using 0.9% NaCl and D20W. How many milliliters of each are needed?

MASTERY PROBLEM 8
Prepare 3 gallons of 5% hydrogen peroxide (H2O2) solution using 30% hydrogen peroxide (H2O2) and 1.5% hydrogen peroxide (H2O2) solutions.  How many milliliters of each are needed?

MASTERY PROBLEM 9
A medication order for 1 L 18% NaCl in D5W, 125ml/hr for 3 days is received in the pharmacy. To prepare the order, the pharmacy has 23.4% concentrated NaCl in stock and D5W.  How many milliliters of each are needed to prepare one bag?

MASTERY PROBLEM 10
How many grams of 25% Zinc Oxide Paste and 3% Zinc Oxide Paste are needed to prepare 240 g of 15% Zinc Oxide Paste?