Pharmacy 102- Chapter 9- Quiz

How many milliliters of active ingredient are in 500 mL of a 14% solution?

70 mL 14 mL : 100 mL x mL 500 mL (14 × 500 = 7,000. 100 × x = 100x. x = 7,000 ÷ 100 = 70).

A prescriber ordered 400 mg in 100 mL to be administered at 15 mL/hr through macrodrip tubing with a. drop factor of 10 gtts/mL. How many milligrams of the drug will be in each drop?

0.4 mg/gtt 400 mg ÷ 100 mL = 4 mg/mL 4 mg/mL ÷ 10 gtts/mL = 0.4 mg/gtt

A prescriber ordered 500 mg in 50 mL to be administered at 25 mL/hr through macrodrip tubing with a. drop factor of 20 gtts/mL. How many milligrams of the drug will be in each drop?

0.5 mg/gtt 500 mg ÷ 50 mL = 10 mg/mL. Next, use the formula: concentration (mg/gtt) = concentration (mg/mL) ÷ drop factor (gtts/mL). Therefore, 10 mg/mL ÷ 20 gtt/mL = 0.5 mg/gtt.

How many milliliters of active ingredient are in 225 mL of a 5% solution?

11.25 mL 5 mL : 100 mL :: x mL 225 mL (5 × 225 = 1,125. 100 × x = 100x. x = 1,125 ÷ 100 = 11.25).

A patient is to receive 1,375 mg in 500 mL over 8 hours. What is the flow rate in milligrams per hour? Round your answer to the nearest tenth of a milligram, if necessary.

171.9 mg/hr 1,375 mg ÷ 8 hr = 171.9 mg/hr.

Your pharmacy stocks a 2.5% liquid in a liquid solution. How is this percentage strength expressed as a ratio strength of a v/v solution?

2.5 mL/100 mL 2.5% solution has 2.5 mL of active ingredient per 100 mL of solution.

How many milliliters of active ingredient are in 1.5 L of a 15% solution?

225 mL 1 L : 1000 mL 1.5 L : x mL (1 × x = 1x. 1000 × 1.5 = 1,500. x = 1,500 ÷ 1 = 1,500) 15 mL : 100 mL :: x mL : 1,500 mL (15 × 1,500 = 22,500. 100 × x = 100x. x = 22,500 ÷ 100 = 225).

A physician has ordered a 500 mL bag of D5NS to be infused at 60 mL/hr. How many bags will be needed in a 24-hour period?

3 500 mL ÷ 60 ml/hr = 8.33 hr. 24 hr ÷ 8.33 hr/bag = 2.88 bags.

How many grams of active ingredient are in 275 mL of a 10% solution?

27.5 g 10 g : 100 mL x g : 275 mL (10 × 275 = 2,750. 100 × x = 100x. x = 2,750 ÷ 100 = 27.5).

A physician has ordered a 1 L bag of D5NS to run at 90 mL/hr. How many bags will be needed in a 24-hour period?

3 1 L = 1,000 mL 1,000 mL ÷ 90 mL/hr = 11.11 hr. 24 hr ÷ 11.11 hr/bag = 2.2 bags,

The pharmacy receives an order for 20 mL of a medication with a concentration of 2 mg/mL. Your pharmacy stocks the medication as 8 mg/mL. How much of the drug and a diluent will you need for this special dilution?

5 mL of drug and 15 mL of diluent 2 mg : 1 mL x mg : 20 mL (2 × 20 = 40. 1 × x = 1x. x = 40 ÷ 1 = 40). 8 mg : 1 mL 40 mg : x mL (8 × x = 8x. 1 × 40 = 40. x = 40 ÷ 8 = 5 mL of drug). 20 mL - 5 mL = 15 mL of diluent.

There are 22 mL of active ingredient in 400 mL of a solution. What is the percentage strength of this solution? Round your answer to the nearest tenth of a percent, if necessary.

5.5% 22 mL : 400 mL x mL : 100 mL (22 × 100 = 2,200. 400 × x = 400x. x = 2,200 ÷ 400 = 5.5.

The pharmacy receives an order for 250 mL of D10W. How much D50W and how much SWFI are needed to make this dilution?

50 mL of D50W and 200 mL of SWFI (250 ÷ 50) × 10 = 50 mL of D50W. 250 mL - 50 mL = 200 mL of SWFI.

There are 15 g of active ingredient in a 210 mL solution. What is the percentage strength of this solution? Round your answer to the nearest tenth of a percent, if necessary.

7.1% 15 g : 210 mL x g : 100 mL (15 × 100 = 1,500. 210 × x = 210x. x = 1,500 ÷ 210 = 7.1).

The pharmacy receives an order for 500 mL of D8W. How much D50W and how much SWFI are needed to this dilution?

80 mL of D50W and 420 mL of SWFI (500 ÷ 50) × 8 = 80 mL of D50W. 500 mL - 80 mL = 420 mL of SWFI.

A physician has ordered a 500 mL bag of IV fluid to be infused over 6 hours. What is the IV flow rate in milliliters per hour? Round your answer to the nearest tenth of a milliliter, if necessary.

83.3 mL/hr 500 mL ÷ 6 hr = 83.3 mL/hr.

A physician orders a 1,000 mL IV bag to be infused at 110 mL/hr. How many hours will it take to infuse the full 1,000 mL IV bag? Round your answer to the nearest tenth of an hour, if necessary.

9.1 hours 1,000 mL ÷ 110 mL/hr = 9.1 hr.

A physician orders a 150 mL IV bag to be infused at 12 mL/hr. How many hours will it take to infuse the full 150 mL IV bag? Round your answer to the nearest tenth of an hour, if necessary.

12.5 hours 150 mL ÷ 12 mL/hr = 12.5 hr.

There are 150 mL of active ingredient in 1,200 mL of a solution. What is the percentage strength of this solution? Round your answer to the nearest tenth of a percent, if necessary.

12.5% Use the equation: 150 mL : 1200 mL x mL : 100 mL (150 × 100 = 15,000. 1,200 × x = 1200x. x = 15,000 ÷ 1,200 = 12.5).

A prescriber ordered 1,250 mg in 500 mL to be administered at 80 mL/hr through macrodrip tubing with a. drop factor of 10 gtts/mL. How many milligrams of the drug will be in each drop?

0.25 mg/gtt 1,250 mg ÷ 500 mL = 2.5 mg/mL. 2.5 mg/mL ÷ 10 gtt/mL = 0.25 mg/gtt.

There are 250 mg of active ingredient in a 75 mL solution. What is the percentage strength of this solution?

0.3% 1000 mg : 1 g 250 mg : x g (1000 × x = 1000x. 1 × 250 = 250. x = 250 ÷ 1000 = 0.25) Next, determine the percentage strength using the equation: 0.25 g : 75 mL :: x g : 100 mL (0.25 × 100 = 25. 75 × x = 75x. x = 25 ÷ 75 = 0.3.

How many grams of active ingredient are in 1 L of a 0.9% solution?

1 L = 1,000 mL. 0.9 g : 100 mL x g : 1,000 mL (0.9 × 1,000 = 900. 100 × x = 100x. x = 900 ÷ 100 = 9).

An IV solution has a total volume of 150 mL and is being administered over 120 minutes using macrodrip tubing with a drop factor of 10 gtts/mL. What is the IV flow rate in drops per minute? Round your answer to the nearest whole number, if necessary.

13 gtts/min (150 mL ÷ 120 min) × 10 gtts/mL = 12.5 gtts/min, which rounds to 13 gtts/min.

The pharmacy receives an order for 75 mL of a medication with a concentration of 15 mg/mL. Your pharmacy stocks the medication as 25 mg/mL. How much of the drug and a diluent will you need for this special dilution?

15 mg : 1 mL x mg : 75 mL (15 × 75 = 1,125. 1 × x = 1x. x = 1,125 ÷ 1 = 1,125). 25 mg : 1 mL :: 1,125 mg : x mL (25 × x = 25x. 1 × 1,125 = 1,125. x = 1,125 ÷ 25 = 45 mL of drug). 75 mL - 45 mL = 30 mL.

A prescription calls for a 20% solution of a medication. How is this percentage strength expressed as a ratio strength of a w/v solution?

20 g/100 mL A w/v solution is expressed as grams of solute per 100 mL of solution. Therefore, this 20% solution has 20 g of active ingredient per 100 mL of solution.

An IV solution has a total volume of 50 mL and is being administered over 45 minutes using macrodrip tubing with a drop factor of 20 gtts/mL. What is the IV flow rate in drops per minute? Round your answer to the nearest whole number, if necessary.

22 gtt/min (50 mL ÷ 45 min) × 20 gtts/mL = 22 gtts/min.

An IV solution has a total volume of 100 mL and is being administered over 180 minutes using microdrip tubing with a drop factor of 60 gtts/mL. What is the IV flow rate in drops per minute? Round your answer to the nearest whole number, if necessary.

33 gtts/min Therefore, (100 mL ÷ 180 min) × 60 gtts/mL = 33 gtts/min.

The pharmacy receives an order for 100 mL of a medication with a concentration of 7.5 mg/mL. Your pharmacy stocks the medication as 15 mg/mL. How much of the drug and a diluent will you need for this special dilution?

50 mL of drug and 50 mL of diluent NOT: First, determine the total amount of medication (mg) needed for the special dilution using the equation: 7.5 mg : 1 mL :: x mg : 100 mL (7.5 × 100 = 750. 1 × x = 1x. 750 ÷ 1 = 750). Next, determine how much of the concentrated medication (mL) is needed using the equation: 15 mg : 1 mL :: 750 mg : x mL (15 × x = 15x. 1 × 750 = 750. x = 750 ÷ 15 = 50 mL of drug). Finally, determine how many milliliters of diluent is needed by subtracting the drug volume from the total ordered volume: 100 mL − 50 mL = 50 mL.

Your pharmacy stocks a 7.5% liquid in a liquid solution. How is this percentage strength expressed as a ratio strength of a v/v solution?

7.5 mL/100 mL A v/v solution is expressed as milliliters of solute per 100 mL of solution. Therefore, this 7.5% solution has 7.5 mL of active ingredient per 100 mL.

Your pharmacy receives the following TPN order: Base Solution: Dextrose 12%, Aminosyn 3%, Liposyn 2.5%, SWFI QSAD to 2,000 mL. Additives: Sodium Chloride 10 mEq, Potassium Chloride 10 mEq, Magnesium Sulfate 15 mEq, and MVI 15 mL/day. You have the following stock solutions: Dextrose 70%, Aminosyn 10%, Liposyn 20%, Sodium Chloride 4 mEq/mL, Potassium Chloride 2 mEq/mL, Magnesium Sulfate 4.06 mEq/mL, and MVI 15 mL/day. How much of each base solution and additive will you prepare? Round your answers to the nearest hundredth of a milliliter, if necessary.

Dextrose: 342.86 mL, Aminosyn: 600 mL, Liposyn: 250 mL, SWFI: 780.95 mL, Sodium Chloride: 2.5 mL, Potassium Chloride: 5 mL, Magnesium Sulfate: 3.69 mL, MVIs: 15 mL. NOT: For the base solutions (except SWFI) use the formula: Volume of base solution = total volume (mL) ÷ stock solution concentration (%) × desired concentration (%). For Dextrose: (2,000 mL ÷ 70) × 12 = 342.86 mL. For Aminosyn: (2,000 ÷ 10) × 3 = 600 mL. For Liposyn: (2,000 ÷ 20) × 2.5 = 250 mL. For Sodium Chloride: 4 mEq : 1 mL :: 10 mEq : x mL (4 × X = 4x. 1 × 10 = 10. 10 ÷ 4 = 2.5 mL). For Potassium Chloride: 2 mEq : 1 mL :: 10 mEq : x mL (2 × X = 2x. 1 × 10 = 10. 10 ÷ 2 = 5 mL). For Magnesium Sulfate: 4.06 mEq : 1 mL :: 15 mEq : x mL (4.06 × X = 4.06x. 1 × 15 = 15. 15 ÷ 4.06 = 3.69 mL). For MVIs: the prescriber ordered a daily amount so you will draw up 15 mL. For SWFI: add all base solutions and additives and then subtract from total volume: 342.86 mL + 600 mL + 250 mL + 2.5 mL + 5 mL + 3.69 mL + 15 mL = 1,219.05. 2,000 mL − 1,219.05 mL = 780.95 mL of SWFI.