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Quizzes > High School Quizzes > Career

Dosage Calculation Practice Quiz

Boost your dosage calculation skills with practice.

Difficulty: Moderate
Grade: Grade 11
Study OutcomesCheat Sheet
Paper art illustrating a trivia quiz on medication dosage calculations for students.

A prescription orders 250 mg of a medication. If the vial contains 500 mg per 5 mL, how many mL are needed for one dose?
5 mL
2.5 mL
1.25 mL
10 mL
The vial has 500 mg in 5 mL, which means the concentration is 100 mg per mL. To get 250 mg, you need 2.5 mL because 250 mg divided by 100 mg/mL equals 2.5 mL.
How many milligrams are in 1 gram of a medication?
100 mg
500 mg
10 mg
1000 mg
One gram is equivalent to 1000 milligrams. This conversion is fundamental in medication dosing calculations.
A liquid medication has a concentration of 100 mg per 2 mL. What volume gives a 150 mg dose?
1.5 mL
3 mL
2 mL
6 mL
Since 100 mg is contained in 2 mL, the concentration is 50 mg per mL. Therefore, to obtain 150 mg, you need 3 mL because 150 mg divided by 50 mg/mL equals 3 mL.
A prescription calls for 0.75 g of a medication. If tablets are available in 250 mg strength, how many tablets must be given?
4 tablets
3 tablets
1 tablet
2 tablets
0.75 grams is equivalent to 750 mg. When each tablet is 250 mg, dividing 750 mg by 250 mg per tablet results in 3 tablets.
Which statement best defines 'dosage' in medication administration?
The duration over which the medication remains effective
The frequency of doses given in a day
The route by which a medication is administered
The specific amount of medication prescribed for one administration
Dosage refers to the specific amount of medication to be given at one time. It is distinct from frequency, duration, and the route of administration.
A child weighing 15 kg is to receive a medication at 20 mg/kg. What is the total dose needed in mg?
300 mg
200 mg
150 mg
350 mg
The required dose is determined by multiplying the child's weight by the dosing rate. Here, 15 kg multiplied by 20 mg/kg equals 300 mg.
A syrup with a concentration of 125 mg per 5 mL is prescribed to provide a 250 mg dose. How many mL of syrup should be given?
5 mL
10 mL
15 mL
20 mL
Using the proportion, 125 mg in 5 mL indicates that doubling the mg (to 250 mg) requires doubling the mL (to 10 mL). This proportionate reasoning gives the correct volume.
A doctor orders 0.3 mg of a drug, and the solution available is 0.5 mg/mL. How many mL should be administered?
0.6 mL
1.0 mL
0.8 mL
0.3 mL
To determine the volume needed, divide the desired dose by the concentration. Dividing 0.3 mg by 0.5 mg/mL results in 0.6 mL.
A vial contains 2 g of medication in 20 mL. If 500 mg is needed, what volume should be administered?
2.5 mL
7.5 mL
5 mL
10 mL
First, convert 2 g to 2000 mg. Dividing 2000 mg by 20 mL gives a concentration of 100 mg/mL. Therefore, 500 mg requires 5 mL.
A patient weighing 80 kg is prescribed 0.25 mg/kg of a medication available as a solution with 2.5 mg/mL. What volume is required?
10 mL
8 mL
6 mL
12 mL
The total dose is calculated by multiplying 80 kg by 0.25 mg/kg, resulting in 20 mg. Dividing 20 mg by the concentration of 2.5 mg/mL gives 8 mL.
A nurse uses a syringe pump that delivers 4 mL per hour. If the medication has a concentration of 25 mg/mL, how many mg are infused in one hour?
125 mg
75 mg
100 mg
50 mg
Multiply the infusion rate by the concentration to find the dose per hour. Here, 4 mL/hr multiplied by 25 mg/mL equals 100 mg.
A medication is supplied as 5 mg per 0.5 mL. What is the concentration in mg/mL?
2.5 mg/mL
0.1 mg/mL
5 mg/mL
10 mg/mL
Dividing 5 mg by 0.5 mL results in a concentration of 10 mg/mL. This conversion helps in dosage calculations.
A solution contains 3 g of a drug in 100 mL. What is the concentration in mg/mL?
30 mg/mL
0.3 mg/mL
300 mg/mL
3 mg/mL
Convert 3 g to 3000 mg. Dividing 3000 mg by 100 mL yields a concentration of 30 mg/mL.
How many micrograms are in 2 mg of a medication?
20 micrograms
100 micrograms
2000 micrograms
200 micrograms
Since 1 mg equals 1000 micrograms, 2 mg is equal to 2000 micrograms. This conversion is essential in dosage calculations.
If a patient receives 150% of a prescribed 200 mg dose, what total amount in mg did the patient receive?
400 mg
350 mg
300 mg
250 mg
Receiving 150% of 200 mg means multiplying 200 mg by 1.5, resulting in 300 mg. This question tests understanding of percentage increases in dosing.
A pediatric patient weighing 25 kg is prescribed a medication at 10 mg/kg. The medication is available as a suspension of 50 mg per 5 mL. How many mL should be administered?
25 mL
30 mL
15 mL
20 mL
First, calculate the total dose: 25 kg Ă - 10 mg/kg equals 250 mg. Since the suspension provides 50 mg in 5 mL (or 10 mg/mL), 250 mg requires 25 mL.
A medication label indicates 0.8 g per 25 mL. Convert this strength to mg per mL and determine the mL required for a 300 mg dose.
12 mL
10 mL
7.5 mL
9.4 mL
Convert 0.8 g to 800 mg, then divide by 25 mL to get a concentration of 32 mg/mL. Dividing the desired 300 mg dose by 32 mg/mL gives approximately 9.4 mL.
A drug is infused at a rate of 120 mL per hour using a solution that contains 0.5 mg per mL. How many milligrams are administered during a 3-hour infusion?
210 mg
200 mg
180 mg
150 mg
The total volume infused in 3 hours is 120 mL/hour Ă - 3 hours = 360 mL. Multiplying this volume by the concentration of 0.5 mg/mL gives 180 mg.
A compounded medication is made by mixing 15 mL of a 100 mg/mL solution with 35 mL of a diluent. What is the final concentration in mg/mL?
25 mg/mL
15 mg/mL
30 mg/mL
20 mg/mL
First, determine the total amount of drug: 15 mL Ă - 100 mg/mL = 1500 mg. The final volume is 15 mL + 35 mL = 50 mL, so the concentration is 1500 mg divided by 50 mL, which is 30 mg/mL.
A patient with a body surface area (BSA) of 1.6 m² is prescribed a drug at 25 mg/m². If the drug is supplied as 200 mg in 20 mL solution, what volume in mL should be administered?
3 mL
5 mL
6 mL
4 mL
Calculate the total dose by multiplying the BSA by the dosing rate: 1.6 m² à - 25 mg/m² = 40 mg. The supplied solution has a concentration of 200 mg in 20 mL (10 mg/mL), so 40 mg requires 4 mL.
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Study Outcomes

  1. Understand key concepts of medication dosage and its relevance in clinical scenarios.
  2. Analyze dosage problems using conversion factors and proportions.
  3. Apply arithmetic skills to compute accurate medication dosages.
  4. Evaluate problem scenarios to identify and correct potential dosing errors.
  5. Develop confidence in handling real-world dosing challenges and exam questions.

Dosage Calculation Quiz & Practice Test Cheat Sheet

  1. Master the metric system - Solidify your foundation by remembering that 1 kilogram equals 1,000 grams and 1 gram equals 1,000 milligrams. This makes converting dosages quick and error‑free during exams and practice. Metric System Quiz on Nurseslabs
  2. Convert between measurement systems - Become a pro at swapping units by knowing that 1 kilogram equals 2.2 pounds and 1 liter equals 1,000 milliliters. With these key benchmarks locked in, you'll sail through any unit‑conversion challenge. Metric Conversion Quiz on Nurseslabs
  3. Apply the standard dosage calculation formula - Get comfy with D (Desired Dose) ÷ H (Dose on Hand) × V (Vehicle) to find out exactly how much medicine to give. This step‑by‑step approach is your trusty roadmap for precise results every time. Standard Dosage Formula Quiz
  4. Use the ratio and proportion method - Set up a ratio comparing what you have to what you need, then solve for the unknown dose. It's like solving a mini‑puzzle that builds confidence and reduces errors. Ratio & Proportion Tutorial
  5. Practice dimensional analysis - Convert units step‑by‑step, canceling out unwanted measures until only your target unit remains. This systematic trick ensures your final answer is in the correct form. Dosage Calculation Formulas on Fiveable
  6. Memorize common conversions - Keep flashcards handy: 1 teaspoon is 5 milliliters, 1 tablespoon is 15 milliliters, and so on. These bite‑sized facts speed up your work and boost accuracy. Conversion Quiz on Nurseslabs
  7. Understand body weight dosing - Learn to calculate pediatric and adult doses by multiplying the dose-per-kilogram rate by the patient's weight. It's crucial for safe, personalized medication plans. Weight-Based Dosing Guide
  8. Learn reconstitution formulas - Figure out how much liquid to add to a powder to get the right concentration for injection or suspension. Practice this to avoid under‑ or overdiluting your meds. Reconstitution Formulas on Fiveable
  9. Practice with real-world scenarios - Tackle sample questions that mimic clinical settings to reinforce your skills under pressure. The more you practice, the more second‑nature dosage calculations become. Practice Questions on SchoolTube
  10. Double-check your calculations - Make it a habit to review every step of your math before documenting or administering a dose. A quick re‑check can catch tiny mistakes and keep patients safe. 7 Must‑Know Tips on eAsynclex
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