Drug Dosage Calculations: Parenteral Medications Practice Exam Quiz

Drug Dosage Calculations: Parenteral Medications Practice Exam Quiz

 

What is the correct conversion of 0.5 milliliters (mL) to cubic centimeters (cc)?

A) 0.05 cc
B) 0.5 cc
C) 5 cc
D) 50 cc

 

A patient needs 250 mg of a drug, and the available concentration is 500 mg/mL. How many milliliters should be administered?

A) 0.25 mL
B) 0.5 mL
C) 1 mL
D) 2 mL

 

You need to administer 1,000 units of heparin. The vial contains 5,000 units/2 mL. How many milliliters will be needed?

A) 0.4 mL
B) 0.5 mL
C) 1.0 mL
D) 2.0 mL

 

A physician orders 1.5 grams of a medication. The available vial contains 750 mg per 1 mL. How many milliliters will you need to administer?

A) 1.5 mL
B) 2.0 mL
C) 3.0 mL
D) 4.0 mL

 

A patient requires a 50 mg dose of a medication, and the concentration is 10 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 5 mL
C) 10 mL
D) 50 mL

 

If a patient is prescribed 0.25 mg/kg of a drug and they weigh 70 kg, how many milligrams should they receive?

A) 12.5 mg
B) 17.5 mg
C) 25 mg
D) 35 mg

 

How many milliliters of a solution containing 1,000 units/mL are required to administer 5,000 units of a medication?

A) 2 mL
B) 5 mL
C) 10 mL
D) 50 mL

 

You need to give a patient 1.5 mL of a solution that has a concentration of 25 mg/mL. How many milligrams will the patient receive?

A) 37.5 mg
B) 50 mg
C) 75 mg
D) 100 mg

 

A medication is supplied as 10 mg/mL. How many milliliters should be administered to provide a 75 mg dose?

A) 5 mL
B) 7.5 mL
C) 10 mL
D) 12.5 mL

 

The order reads 200 mg of a drug, and the available concentration is 100 mg/mL. How many milliliters should be administered?

A) 0.5 mL
B) 1 mL
C) 2 mL
D) 4 mL

 

A patient is to receive 4 units of insulin. The vial contains 100 units/mL. How many milliliters should be administered?

A) 0.04 mL
B) 0.04 cc
C) 0.4 mL
D) 4 mL

 

The prescribed dose is 12.5 mL of a medication. The concentration is 50 mg/mL. How many milligrams will the patient receive?

A) 250 mg
B) 500 mg
C) 750 mg
D) 1,250 mg

 

A patient needs 1,000 mg of a medication. The available solution contains 500 mg per 2 mL. How many milliliters should be given?

A) 2 mL
B) 4 mL
C) 5 mL
D) 8 mL

 

How many milliliters of a 5% solution are required to provide a 15 gram dose?

A) 150 mL
B) 200 mL
C) 300 mL
D) 500 mL

 

A physician orders 30 mg of a drug, and the available vial contains 10 mg/mL. How many milliliters will be required?

A) 2 mL
B) 3 mL
C) 5 mL
D) 10 mL

 

The prescribed dose is 4.5 grams. You have a vial with a concentration of 1.5 grams per 1 mL. How many milliliters should be given?

A) 2 mL
B) 3 mL
C) 4 mL
D) 6 mL

 

A medication order reads: administer 2,000 units of heparin. The vial contains 1,000 units/mL. How many milliliters are required?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

If a medication is available in 0.5 mg/mL concentration and the prescribed dose is 3 mg, how many milliliters should be administered?

A) 1 mL
B) 3 mL
C) 5 mL
D) 6 mL

 

The prescribed dose is 0.6 mL, and the available concentration is 100 units/mL. How many units will be administered?

A) 60 units
B) 100 units
C) 200 units
D) 600 units

 

A drug is ordered at a rate of 5 mL per hour. How many milliliters should be administered in 6 hours?

A) 15 mL
B) 25 mL
C) 30 mL
D) 60 mL

 

A solution contains 2 mg/mL, and the patient needs a 10 mg dose. How many milliliters will be required?

A) 3 mL
B) 4 mL
C) 5 mL
D) 6 mL

 

How many milliliters of a solution containing 200 mg/mL are required to give a 1,000 mg dose?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 100 mg of a medication. The available solution contains 50 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A drug is ordered at a rate of 15 mL per hour. How many milliliters should be administered over 4 hours?

A) 45 mL
B) 60 mL
C) 75 mL
D) 90 mL

 

A solution contains 25 mg/mL. How many milliliters are needed to administer a 100 mg dose?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The available solution is 40 mg/mL. The doctor orders 120 mg. How many milliliters should be given?

A) 1.5 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The prescribed dose is 4 grams of a medication. The available concentration is 1.5 grams per 2 mL. How many milliliters are needed?

A) 2.5 mL
B) 4.5 mL
C) 6 mL
D) 8 mL

 

A vial contains 50,000 units in 10 mL. The doctor orders 25,000 units. How many milliliters should be administered?

A) 2.5 mL
B) 5 mL
C) 10 mL
D) 12.5 mL

 

A solution contains 4 mg/mL, and the prescribed dose is 16 mg. How many milliliters should be given?

A) 2 mL
B) 4 mL
C) 6 mL
D) 8 mL

 

A patient is to receive 2.5 grams of a medication. The concentration is 1.25 grams/2 mL. How many milliliters should be administered?

A) 2.0 mL
B) 3.0 mL
C) 4.0 mL
D) 5.0 mL

 

The doctor prescribes 500 mg of a medication. The available concentration is 250 mg/mL. How many milliliters will be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is available in a concentration of 200 mg/mL. How many milliliters are required for a 1,000 mg dose?

A) 4 mL
B) 5 mL
C) 6 mL
D) 7 mL

 

The prescribed dose is 40 mg. The available solution contains 10 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A patient needs 0.8 mg/kg of a medication, and the patient weighs 80 kg. How many milligrams should be administered?

A) 64 mg
B) 80 mg
C) 120 mg
D) 160 mg

 

A vial contains 1,000 units of insulin per 5 mL. How many milliliters are required to administer a 500 unit dose?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The order reads: administer 500 mg of a drug. The available concentration is 250 mg/2 mL. How many milliliters should be given?

A) 1 mL
B) 2 mL
C) 4 mL
D) 5 mL

 

The prescribed dose is 2.5 mg/kg. If the patient weighs 70 kg, how many milligrams should be administered?

A) 150 mg
B) 175 mg
C) 200 mg
D) 225 mg

 

The doctor orders 100 mL of normal saline to be infused over 4 hours. What is the infusion rate in milliliters per hour?

A) 20 mL/hour
B) 25 mL/hour
C) 30 mL/hour
D) 35 mL/hour

 

A medication is available in a 1 mg/mL concentration. The doctor prescribes 3 mg. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is available in a concentration of 500 units/mL. The doctor orders 1,000 units. How many milliliters should be given?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is ordered at a dosage of 0.5 mg/kg. If the patient weighs 50 kg, how many milligrams should be administered?

A) 20 mg
B) 25 mg
C) 30 mg
D) 35 mg

 

The doctor orders 5,000 units of heparin. The available concentration is 10,000 units/2 mL. How many milliliters should be given?

A) 0.5 mL
B) 1 mL
C) 2 mL
D) 4 mL

 

The doctor prescribes 1,200 mg of a medication. The vial contains 400 mg/mL. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

You need to administer 5,000 units of insulin. The vial contains 100 units/mL. How many milliliters should be administered?

A) 2 mL
B) 4 mL
C) 5 mL
D) 10 mL

 

A solution contains 2.5 mg/mL. How many milliliters are needed for a dose of 25 mg?

A) 7.5 mL
B) 8.0 mL
C) 10.0 mL
D) 12.5 mL

 

A vial contains 500 mg per 10 mL. The doctor orders 250 mg. How many milliliters should be given?

A) 2 mL
B) 5 mL
C) 10 mL
D) 12 mL

 

A patient is ordered 3 mg of a medication, and the available concentration is 1 mg/mL. How many milliliters will be needed?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor prescribes 1.2 grams of a medication. The available concentration is 400 mg/mL. How many milliliters will be administered?

A) 2.5 mL
B) 3.0 mL
C) 4.0 mL
D) 5.0 mL

 

The prescribed dose is 30 mL of a 10% solution. How many grams of the drug will the patient receive?

A) 3 grams
B) 5 grams
C) 10 grams
D) 30 grams

 

The doctor orders 1,500 units of heparin. The vial contains 5,000 units/2 mL. How many milliliters should be administered?

A) 0.5 mL
B) 0.6 mL
C) 1.0 mL
D) 1.5 mL

 

The doctor orders 150 mg of a medication. The available concentration is 50 mg/mL. How many milliliters will be required?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A patient is prescribed 8 mg of a medication, and the concentration is 4 mg/mL. How many milliliters will be required?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 0.5 mg/kg of a drug. If the patient weighs 60 kg, how many milligrams should be administered?

A) 20 mg
B) 30 mg
C) 35 mg
D) 40 mg

 

A vial contains 500 mg per 5 mL. The doctor orders 100 mg. How many milliliters will be needed?

A) 1 mL
B) 2 mL
C) 3 mL
D) 5 mL

 

The available solution contains 50 mg/mL. The doctor orders 150 mg. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor prescribes 0.3 mg/kg for a patient weighing 85 kg. How many milligrams will be required?

A) 20 mg
B) 25 mg
C) 30 mg
D) 35 mg

 

A solution contains 4 mg/mL. How many milliliters are needed for a dose of 12 mg?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

A medication is available in a 1:1,000 concentration. How many milliliters are needed to provide a 10 mg dose?

A) 0.5 mL
B) 1.0 mL
C) 2.0 mL
D) 5.0 mL

 

The order is for 3,000 units of a medication. The available vial contains 1,000 units/mL. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 150 mg of a drug, and the available solution is 50 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 5 mL

 

The doctor orders 0.4 mg/kg of a medication for a patient weighing 70 kg. How many milligrams should be administered?

A) 28 mg
B) 35 mg
C) 40 mg
D) 45 mg

 

A medication is available in a concentration of 2 mg/mL. The doctor orders 6 mg. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor prescribes 250 mg of a medication. The available concentration is 125 mg/5 mL. How many milliliters should be given?

A) 5 mL
B) 6 mL
C) 7 mL
D) 8 mL

 

A medication is available in a concentration of 150 mg/mL. How many milliliters will be required for a dose of 450 mg?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 0.5 mg/kg of a medication, and the patient weighs 80 kg. How many milligrams should be administered?

A) 35 mg
B) 40 mg
C) 45 mg
D) 50 mg

 

A solution contains 10 mg/mL. How many milliliters are needed to administer a 50 mg dose?

A) 3 mL
B) 4 mL
C) 5 mL
D) 6 mL

 

A vial contains 1,000 units/mL. The doctor orders 200 units. How many milliliters should be given?

A) 0.1 mL
B) 0.2 mL
C) 0.3 mL
D) 0.4 mL

 

The prescribed dose is 15 mg. The available concentration is 5 mg/mL. How many milliliters will be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 0.3 mg/kg of a medication, and the patient weighs 90 kg. How many milligrams should be administered?

A) 25 mg
B) 27 mg
C) 28 mg
D) 30 mg

 

The doctor orders 2,000 units of heparin. The vial contains 10,000 units/5 mL. How many milliliters should be administered?

A) 0.5 mL
B) 1 mL
C) 2 mL
D) 4 mL

 

A medication is available in a concentration of 300 mg/5 mL. The doctor orders 600 mg. How many milliliters will be administered?

A) 5 mL
B) 10 mL
C) 12 mL
D) 15 mL

 

A solution contains 1,000 units/mL. The doctor orders 3,000 units. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 5 mg/kg for a patient weighing 60 kg. How many milligrams should be administered?

A) 250 mg
B) 300 mg
C) 350 mg
D) 400 mg

 

The doctor prescribes 100 mg of a medication, and the available concentration is 25 mg/mL. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor prescribes 2.5 mg/kg for a patient weighing 75 kg. How many milligrams should be administered?

A) 180 mg
B) 200 mg
C) 210 mg
D) 220 mg

 

A vial contains 50 mg per 5 mL. The doctor orders 100 mg. How many milliliters should be administered?

A) 5 mL
B) 10 mL
C) 15 mL
D) 20 mL

 

The doctor prescribes 20 mg of a drug, and the available concentration is 10 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 3,000 units of insulin. The vial contains 500 units/mL. How many milliliters will be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

A medication is available in a concentration of 5 mg/mL. How many milliliters are needed for a dose of 20 mg?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 500 mg of a medication. The available concentration is 200 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is available in a concentration of 75 mg/mL. The doctor prescribes 150 mg. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 1,000 units of heparin. The available concentration is 5,000 units/mL. How many milliliters should be given?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is ordered at a dosage of 0.5 mg/kg. If the patient weighs 80 kg, how many milligrams should be administered?

A) 35 mg
B) 40 mg
C) 45 mg
D) 50 mg

 

The doctor orders 150 mg of a medication, and the available concentration is 50 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 5 mL

 

A solution contains 500 mg/mL. How many milliliters are needed for a dose of 1,000 mg?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is available in a 5 mg/mL concentration. How many milliliters will be required to administer a 25 mg dose?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 40 mg of a medication. The available concentration is 20 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 100 mg of a medication. The available concentration is 25 mg/5 mL. How many milliliters will be required?

A) 5 mL
B) 6 mL
C) 7 mL
D) 8 mL

 

The doctor orders 0.25 mg/kg of a drug for a patient who weighs 50 kg. How many milligrams should be administered?

A) 10 mg
B) 12 mg
C) 15 mg
D) 20 mg

 

The doctor orders a 20 mg dose of a medication, and the available concentration is 8 mg/mL. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 150 mg of a medication. The available concentration is 300 mg/10 mL. How many milliliters should be administered?

A) 2.5 mL
B) 3 mL
C) 5 mL
D) 7.5 mL

 

A medication is ordered at 0.2 mg/kg, and the patient weighs 60 kg. How many milligrams should be administered?

A) 12 mg
B) 15 mg
C) 20 mg
D) 25 mg

 

The doctor prescribes 80 mg of a drug. The available concentration is 40 mg/mL. How many milliliters should be given?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders a 2,000-unit dose of heparin. The vial contains 500 units/mL. How many milliliters should be given?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 0.5 mg/kg of a drug for a patient weighing 55 kg. How many milligrams should be administered?

A) 20 mg
B) 25 mg
C) 30 mg
D) 35 mg

 

A medication is available in a concentration of 5 mg/mL. The doctor orders 30 mg. How many milliliters should be administered?

A) 5 mL
B) 6 mL
C) 7 mL
D) 8 mL

 

A medication is available in a concentration of 10 mg/mL. The doctor orders 80 mg. How many milliliters should be administered?

A) 5 mL
B) 6 mL
C) 7 mL
D) 8 mL

 

The doctor orders 2 mg/kg for a patient weighing 80 kg. How many milligrams should be administered?

A) 120 mg
B) 140 mg
C) 160 mg
D) 180 mg

 

A medication is available in a concentration of 100 mg/2 mL. The doctor orders 250 mg. How many milliliters should be administered?

A) 4 mL
B) 5 mL
C) 6 mL
D) 7 mL

 

The doctor orders 4,000 units of a drug. The available concentration is 2,000 units/mL. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 100 mg of a drug. The available concentration is 25 mg/mL. How many milliliters should be administered?

A) 3 mL
B) 4 mL
C) 5 mL
D) 6 mL

 

A medication is available in a concentration of 50 mg/mL. The doctor orders 300 mg. How many milliliters should be administered?

A) 4 mL
B) 5 mL
C) 6 mL
D) 7 mL

 

The doctor orders a 100 mg dose of a drug. The available concentration is 200 mg/mL. How many milliliters should be administered?

A) 0.25 mL
B) 0.5 mL
C) 1 mL
D) 1.5 mL

 

A medication is available in a concentration of 150 mg/mL. The doctor orders 600 mg. How many milliliters should be administered?

A) 3 mL
B) 4 mL
C) 5 mL
D) 6 mL

 

A medication is available in a concentration of 1 mg/mL. The doctor orders 0.5 mg. How many milliliters should be administered?

A) 0.2 mL
B) 0.5 mL
C) 1 mL
D) 1.5 mL

 

The doctor orders 10,000 units of insulin. The available concentration is 500 units/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is ordered at 4 mg/kg, and the patient weighs 70 kg. How many milligrams should be administered?

A) 220 mg
B) 250 mg
C) 280 mg
D) 300 mg

 

A medication is available in a concentration of 100 mg/mL. The doctor orders 1,500 mg. How many milliliters should be administered?

A) 10 mL
B) 15 mL
C) 20 mL
D) 25 mL

 

The doctor orders a 200 mg dose of a medication. The available concentration is 50 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 0.4 mg/kg for a patient weighing 100 kg. How many milligrams should be administered?

A) 30 mg
B) 35 mg
C) 40 mg
D) 45 mg

 

A medication is available in a concentration of 50 mg/mL. The doctor orders 200 mg. How many milliliters should be administered?

A) 3 mL
B) 4 mL
C) 5 mL
D) 6 mL

 

The doctor orders 2 mg/kg for a patient weighing 40 kg. How many milligrams should be administered?

A) 70 mg
B) 80 mg
C) 90 mg
D) 100 mg

 

A medication is available in a concentration of 150 mg/5 mL. The doctor orders 450 mg. How many milliliters should be administered?

A) 10 mL
B) 12 mL
C) 15 mL
D) 18 mL

 

The doctor orders 200 mg of a drug. The available concentration is 100 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders a 250 mg dose of a medication. The available concentration is 25 mg/mL. How many milliliters should be administered?

A) 5 mL
B) 6 mL
C) 7 mL
D) 8 mL

 

The doctor orders 0.1 mg/kg of a drug for a patient weighing 50 kg. How many milligrams should be administered?

A) 3 mg
B) 5 mg
C) 7 mg
D) 10 mg

 

The doctor orders 1,500 units of insulin. The available concentration is 500 units/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is ordered at 2 mg/kg, and the patient weighs 65 kg. How many milligrams should be administered?

A) 120 mg
B) 130 mg
C) 140 mg
D) 150 mg

 

A medication is available in a concentration of 20 mg/mL. The doctor orders 40 mg. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 0.6 mg/kg for a patient weighing 50 kg. How many milligrams should be administered?

A) 25 mg
B) 30 mg
C) 35 mg
D) 40 mg

 

A doctor prescribes a medication that is available in a concentration of 250 mg/5 mL. The prescribed dose is 500 mg. How many milliliters should be administered?

A) 5 mL
B) 10 mL
C) 15 mL
D) 20 mL

 

A medication is available in a concentration of 50 mg/mL. The doctor orders 100 mg. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A patient weighs 75 kg, and the doctor orders a medication at 0.4 mg/kg. How many milligrams should be administered?

A) 25 mg
B) 30 mg
C) 35 mg
D) 40 mg

 

The doctor orders 500 mg of a drug. The available concentration is 250 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A patient weighs 60 kg, and the doctor orders 3 mg/kg. How many milligrams should be administered?

A) 120 mg
B) 150 mg
C) 180 mg
D) 200 mg

 

A medication is available in a concentration of 500 mg/mL. The doctor orders 1000 mg. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is available in a concentration of 10 mg/mL. The doctor orders 60 mg. How many milliliters should be administered?

A) 4 mL
B) 5 mL
C) 6 mL
D) 7 mL

 

A doctor orders 400 mg of a drug. The available concentration is 100 mg/mL. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

A medication is available in a concentration of 2 mg/mL. The doctor orders 6 mg. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

A doctor orders a 200 mg dose of a medication. The available concentration is 100 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

The doctor orders 15 mg/kg of a drug for a patient weighing 70 kg. How many milligrams should be administered?

A) 100 mg
B) 105 mg
C) 110 mg
D) 115 mg

 

A medication is available in a concentration of 50 mg/mL. The doctor orders 150 mg. How many milliliters should be administered?

A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL

 

A medication is available in a concentration of 25 mg/mL. The doctor orders 100 mg. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 10 mg/kg for a patient weighing 45 kg. How many milligrams should be administered?

A) 400 mg
B) 450 mg
C) 500 mg
D) 550 mg

 

The doctor orders 75 mg of a drug. The available concentration is 25 mg/mL. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

A medication is available in a concentration of 100 mg/2 mL. The doctor orders 200 mg. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 0.3 mg/kg for a patient weighing 80 kg. How many milligrams should be administered?

A) 20 mg
B) 25 mg
C) 30 mg
D) 35 mg

 

A patient weighs 100 kg, and the doctor orders a 0.5 mg/kg dose. How many milligrams should be administered?

A) 40 mg
B) 50 mg
C) 60 mg
D) 70 mg

 

A medication is available in a concentration of 250 mg/10 mL. The doctor orders 125 mg. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 1.5 mg/kg for a patient weighing 55 kg. How many milligrams should be administered?

A) 75 mg
B) 80 mg
C) 85 mg
D) 90 mg

 

A medication is available in a concentration of 500 mg/mL. The doctor orders 300 mg. How many milliliters should be administered?

A) 0.5 mL
B) 1 mL
C) 1.5 mL
D) 2 mL

 

A medication is available in a concentration of 200 mg/mL. The doctor orders 800 mg. How many milliliters should be administered?

A) 2 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

The doctor orders 0.2 mg/kg for a patient weighing 50 kg. How many milligrams should be administered?

A) 5 mg
B) 6 mg
C) 7 mg
D) 8 mg

 

The doctor orders 100 mg of a drug. The available concentration is 25 mg/mL. How many milliliters should be administered?

A) 1 mL
B) 3 mL
C) 4 mL
D) 5 mL

 

A patient weighs 120 kg, and the doctor orders a 0.25 mg/kg dose. How many milligrams should be administered?

A) 25 mg
B) 30 mg
C) 35 mg
D) 40 mg

 

A medication is available in a concentration of 50 mg/mL. The doctor orders 1,500 mg. How many milliliters should be administered?

A) 20 mL
B) 25 mL
C) 30 mL
D) 35 mL

 

The doctor orders 200 mg of a drug. The available concentration is 20 mg/mL. How many milliliters should be administered?

A) 5 mL
B) 10 mL
C) 15 mL
D) 20 mL

 

A patient weighs 50 kg, and the doctor orders 0.5 mg/kg. How many milligrams should be administered?

A) 15 mg
B) 20 mg
C) 25 mg
D) 30 mg

 

The doctor orders 500 mg of a drug. The available concentration is 50 mg/mL. How many milliliters should be administered?

A) 5 mL
B) 6 mL
C) 7 mL
D) 8 mL

 

The doctor orders 10 mg/kg for a patient weighing 80 kg. How many milligrams should be administered?

A) 600 mg
B) 700 mg
C) 800 mg
D) 900 mg

 

Questions and Answers for Study Guide

 

Explain the importance of accurate drug dosage calculations in administering parenteral medications.

Answer:

Accurate drug dosage calculations are critical in administering parenteral medications to ensure patient safety, avoid underdosing or overdosing, and achieve the desired therapeutic effect. Errors in calculations can lead to severe consequences, including drug toxicity, ineffectiveness, or even death. Parenteral routes bypass the gastrointestinal system, leading to immediate drug effects, so errors are less forgiving compared to oral administration. Nurses and healthcare professionals must double-check calculations, use validated formulas, and cross-reference the prescribed dose with the patient’s weight, age, and medical condition to minimize risks. Tools like infusion pumps and dosage calculators can enhance accuracy but should not replace manual verification.

 

Discuss the steps involved in calculating a drug dose for a pediatric patient based on weight.

Answer:

Calculating a drug dose for a pediatric patient based on weight involves the following steps:

1. Obtain the patient’s weight in kilograms (kg): Convert pounds to kilograms if necessary (1 kg = 2.2 lbs).
2. Review the prescribed dose: Ensure the dose is appropriate for the child’s condition and recommended dosage guidelines.
3. Use the formula:
   $\text{Dose}=\text{Weight (kg)}\times \text{Dosage (mg/kg)}$
   For example, if a drug requires 2 mg/kg and the child weighs 15 kg, the dose is $15\times 2=30\text{mg}$.
4. Verify the concentration: Check the concentration of the medication available (e.g., mg/mL).
5. Calculate the volume to administer:
   Volume=Dose (mg)Concentration (mg/mL)\text{Volume} = \frac{\text{Dose (mg)}}{\text{Concentration (mg/mL)}}Volume=Concentration (mg/mL)Dose (mg)​.
6. Double-check the calculation: Verify the dose with a colleague or use a calculator to minimize errors.
7. Administer safely: Confirm the five rights of medication administration (right patient, drug, dose, route, and time).

 

Describe common errors in drug dosage calculations and strategies to avoid them.

Answer:

Common Errors:

• Mathematical mistakes: Miscalculations during conversions or incorrect use of formulas.
• Misinterpretation of orders: Confusion due to unclear handwriting or ambiguous abbreviations.
• Incorrect weight conversions: Failing to accurately convert pounds to kilograms.
• Failure to consider patient-specific factors: Overlooking factors like age, organ function, or comorbidities.
• Wrong concentration selection: Using a vial with a different concentration than anticipated.

Strategies to Avoid Errors:

1. Use standardized tools: Utilize calculators, dosage charts, and conversion tables.
2. Double-check calculations: Review calculations independently or with a colleague.
3. Understand the medication: Familiarize yourself with the drug’s indications, contraindications, and dosing guidelines.
4. Avoid ambiguous abbreviations: Write out full instructions and avoid symbols like “U” for units.
5. Verify patient details: Confirm the patient’s weight, age, and medical history before calculation.
6. Engage in continuing education: Regularly update knowledge on drug dosage calculations and new guidelines.
7. Implement technology: Use electronic prescribing and automated infusion pumps to reduce manual errors.

 

Compare and contrast the methods for calculating drug dosages for intravenous (IV) versus intramuscular (IM) administration.

Answer:

IV Dosage Calculations:

• Method: Requires consideration of infusion rates and total volume. The formula often includes time as a variable:
  Rate=Volume (mL)Time (hours)\text{Rate} = \frac{\text{Volume (mL)}}{\text{Time (hours)}}Rate=Time (hours)Volume (mL)​.
• Precision: High precision is needed as IV drugs are delivered directly into the bloodstream, leading to immediate effects.
• Adjustment: Requires constant monitoring to adjust for infusion rates or dilution.

IM Dosage Calculations:

• Method: Focuses on the total volume to be injected and the concentration of the drug. The formula is simpler:
  Volume=Dose (mg)Concentration (mg/mL)\text{Volume} = \frac{\text{Dose (mg)}}{\text{Concentration (mg/mL)}}Volume=Concentration (mg/mL)Dose (mg)​.
• Considerations: Volume per injection site is limited (e.g., max 3 mL for adults) to avoid tissue damage.
• Absorption: Drugs administered IM are absorbed slower than IV, providing a more gradual therapeutic effect.

Key Differences:

• IV administration demands precise control of rates and volume, while IM focuses on ensuring safe volume and proper site selection.
• IV is used for emergencies and rapid drug delivery, whereas IM is for slower, sustained release.

Similarities:

• Both require accurate dosage calculations and adherence to aseptic techniques.

 

Why is it essential to adjust drug dosages for specific populations such as the elderly or those with renal impairments?

Answer:

Adjusting drug dosages for specific populations is essential to prevent adverse effects and ensure therapeutic efficacy.

Elderly Patients:

• Reasons for Adjustment: Aging affects drug metabolism and excretion. Reduced liver function impairs metabolism, while decreased renal function slows drug clearance, increasing the risk of accumulation and toxicity.
• Considerations: Start with lower doses and titrate upwards cautiously. Regularly monitor renal and liver function.

Patients with Renal Impairments:

• Reasons for Adjustment: The kidneys play a significant role in excreting many drugs and their metabolites. Impaired renal function leads to reduced clearance, prolonging the drug’s half-life and increasing its toxicity risk.
• Considerations: Use drugs with lower renal clearance or adjust the dosing interval and amount. Monitor creatinine clearance (CrCl) or glomerular filtration rate (GFR) to guide adjustments.

In both cases, individualized dosing is vital. Tools like the Cockcroft-Gault equation for estimating CrCl and age-specific dosing guidelines help optimize therapy.

 

Provide an example of a real-life scenario requiring a critical drug dosage calculation and describe the process.

Answer:

Scenario:
A 55 kg pediatric patient presents with severe dehydration and requires immediate IV administration of a drug prescribed at 0.8 mg/kg. The drug is available in a concentration of 5 mg/mL.

Process:

1. Determine the dose:
   $\text{Dose}=\text{Weight (kg)}\times \text{Dosage (mg/kg)}$
   $\text{Dose}=55\times 0.8=44\text{mg}$.
2. Calculate the volume to administer:
   Volume=Dose (mg)Concentration (mg/mL)\text{Volume} = \frac{\text{Dose (mg)}}{\text{Concentration (mg/mL)}}Volume=Concentration (mg/mL)Dose (mg)​
   Volume=445=8.8 mL\text{Volume} = \frac{44}{5} = 8.8 \, \text{mL}Volume=544​=8.8mL.
3. Verify calculations: Double-check both dose and volume calculations.
4. Administer the drug safely: Use an IV pump to control the infusion rate, and monitor the patient for adverse effects.

Outcome:
The patient receives the correct dose, preventing underdosing or overdosing, and begins to recover.

 

Describe the factors that influence drug absorption and distribution in parenteral administration.

Answer:

Factors Influencing Drug Absorption:

1. Route of Administration: IV provides immediate absorption, while IM and subcutaneous routes depend on blood flow to the injection site.
2. Blood Flow: Highly vascularized areas enhance drug absorption. For example, IM injections in the deltoid muscle are absorbed faster than in the gluteus.
3. Drug Solubility: Lipid-soluble drugs penetrate cell membranes more easily, enhancing absorption.
4. Formulation: Drugs in aqueous solutions are absorbed faster than those in oil-based suspensions.

Factors Influencing Drug Distribution:

1. Blood Circulation: Cardiac output and blood flow to specific tissues affect distribution.
2. Plasma Protein Binding: Drugs bound to proteins like albumin are inactive; only the free drug can exert therapeutic effects.
3. Tissue Permeability: Lipophilic drugs cross cell membranes more effectively, while hydrophilic drugs may be limited to extracellular spaces.
4. Volume of Distribution (Vd): Drugs with a higher Vd distribute widely into tissues, while those with a low Vd remain in the plasma.

Understanding these factors is crucial for calculating appropriate dosages and predicting therapeutic outcomes.

 

Explain the importance of reconstitution in parenteral drug preparations and the steps involved.

Answer:

Importance of Reconstitution:

Many parenteral medications are supplied as powders to increase shelf life and stability. Reconstitution involves dissolving the powder in a diluent (e.g., sterile water, saline) to prepare the drug for administration. Accurate reconstitution is essential to ensure proper drug concentration, avoid contamination, and prevent errors in dosing.

Steps Involved in Reconstitution:

1. Read the Instructions: Review the manufacturer’s guidelines for the correct diluent and volume.
2. Gather Supplies: Sterile syringe, vial of medication, and appropriate diluent.
3. Aseptic Technique: Clean the vial stopper with an alcohol swab to prevent contamination.
4. Draw the Diluent: Use a sterile syringe to draw the recommended amount of diluent.
5. Add Diluent to the Vial: Inject the diluent into the medication vial and swirl gently (do not shake) until the powder dissolves completely.
6. Check for Clarity: Ensure the solution is clear and free of particulates.
7. Label the Vial: Include the concentration, date, and time of reconstitution.
8. Calculate the Dose: Based on the reconstituted concentration, calculate the dose to administer.

Proper reconstitution ensures patient safety and effective drug delivery.

 

Discuss the role of technology in improving accuracy in drug dosage calculations.

Answer:

Role of Technology:

1. Electronic Health Records (EHRs): Automatically calculate and verify dosages based on patient-specific data (e.g., weight, age, renal function).
2. Dosage Calculators: Apps and online tools simplify complex calculations, reducing human error.
3. Infusion Pumps: Programmable devices precisely control IV drug delivery rates and volumes.
4. Barcode Scanning: Ensures the right drug is administered to the right patient at the correct dose and route.
5. Automated Dispensing Systems (ADS): Dispense medications in pre-calculated doses, minimizing the risk of miscalculations.

Benefits:

• Reduces errors in calculations and administration.
• Enhances efficiency and saves time.
• Provides decision support for high-risk medications like insulin or chemotherapy.

Challenges:

• Over-reliance on technology may lead to skill degradation in manual calculations.
• Technical failures can interrupt care.

Healthcare professionals should use technology as a supplement, not a replacement, for clinical judgment.

 

Describe how to handle and dispose of parenteral medications safely.

Answer:

Handling Parenteral Medications:

1. Aseptic Technique: Use sterile gloves and disinfect vials and ampules before drawing medication.
2. Proper Storage: Store medications at the recommended temperature and away from light if required.
3. Avoid Cross-Contamination: Use separate syringes and needles for each patient.

Disposal of Parenteral Medications:

1. Unused Medication: Dispose of in pharmaceutical waste bins to prevent environmental contamination.
2. Syringes and Needles: Place in sharps containers immediately after use to prevent needlestick injuries.
3. Expired Medications: Follow hospital or local regulations for disposing of expired drugs.

Safe handling and disposal practices protect healthcare workers, patients, and the environment.

 

How do you approach drug dosage calculations for patients with multiple comorbidities?

Answer:

Approach for Patients with Comorbidities:

1. Comprehensive Assessment: Evaluate the patient’s medical history, current medications, renal and liver function, and potential drug interactions.
2. Adjust Dosages: Modify doses based on organ function, especially for drugs metabolized by the liver or excreted by the kidneys.
3. Consider Drug Interactions: Some medications may enhance or reduce the effect of others, requiring dosage adjustments.
4. Monitor Therapeutic Levels: For drugs with narrow therapeutic windows (e.g., digoxin, warfarin), regularly check plasma levels to avoid toxicity.
5. Consult Pharmacists: Collaborate with pharmacists to optimize drug regimens and ensure appropriate dosing.

Tailored dosing minimizes risks and improves therapeutic outcomes in complex cases.

 

Discuss ethical considerations in drug dosage calculations and administration.

Answer:

Ethical Considerations:

1. Patient Safety: Healthcare professionals have a moral obligation to ensure accurate dosage calculations to prevent harm.
2. Informed Consent: Patients should be informed about the medication, its dosage, and potential risks.
3. Accountability: Report any errors promptly and take corrective measures to avoid recurrence.
4. Confidentiality: Protect patient information during medication preparation and administration.
5. Professional Competence: Continuously update skills and knowledge to maintain proficiency in drug calculations.

Ethical practice fosters trust and enhances the quality of care.

 

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