VTNE math practice questions and
answers with correct solutions
The attending veterinarian asks you to administer 120 mg of enrofloxacin (Baytril) IV slow over
20 minutes to a dog that is hospitalized in your clinic. The strength of injectable enrofloxacin is
2.27%, how many milliliters of drug will you administer? ✔✔Answer: 5.3 ml
A 2.27% solution is 22.7 mg/ml. 120 mg divided by 22.7 mg/ml = 5.3 mls
A 120-pound Great Dane has presented with Gastric Dilatation Volvulus. The clinician has asked
you to quickly prepare the drug protocol. As a premedication, the dog is to receive 0.08 mg/kg of
Hydromorphone. How many milligrams will you administer? ✔✔Answer: 4.4 mg
To calculate milligrams administered the dog's body weight should be converted to kilograms.
As a general rule, the majority of medications are dosed in a milligram-per-kilogram dosing.
Therefore all body weights need to be converted to kilograms so that you are working in the
same units.
120 lb/2.2 = 54.5 kg (There are 2.2 lbs per kilogram)
,54.5 kg x (0.08 mg/kg) = 4.4 mg (Notice the "kg" will cancel out when you do the math)
If your answer was 9.6 mg, you did not convert the body weight into kilograms.
How many milligrams are in 100 ml of a 3% solution? ✔✔Answer: 3,000 mg
A 3% solution is equal to 30 mg/mL.
Now take 100 mL X 30 mg/mL = 3000 mg= 3 grams (since there are 1000 mg in 1 gram)
How many milliliters should be administered to a 100-kg patient that needs 50 mg of a 2.5%
solution? ✔✔Answer: 2 ml
Percent is equal to weight (in Grams) / 100 parts volume (in mLs)
(This is based on water since 1 mL weighs 1 Gram):
Example: A 3% solution: 3 Grams / 100 mL or 3000 mg / 100 mL or 30 mg/mL
The easiest way to remember is to just add a zero onto any percentage for the milligrams (i.e. 2%
solution = 20 mg/ml; 10% solution = 100 mg/ml, etc.)
In this situation a 2.5% solution is equivalent to 25 mg/ml. Therefore:
, 50 mg / (25 mg/ml) = 2 ml
A 4-kg puppy is in need of subcutaneous fluids due to dehydration. The doctor prescribed a dose
of 20 ml/kg. How many milliliters should this patient receive? ✔✔Answer: 80 ml
To obtain the answer the following math should have been performed:
4 kg x (20 ml/kg) = 80 ml
Notice the kilograms were canceled out.
A dog presents with a history of coughing and rapid breathing. Radiographs confirm congestive
heart failure (see image). You are asked to administer 2 mg/kg of furosemide IV. The
concentration of furosemide is 50 mg/mL. The dog weighs 25 pounds. How many milliliters
should you administer to this patient? ✔✔Answer: 0.44 mL
The dog is 25 pounds.
25 pounds/2.2 pounds per kg= 11.3 kg
answers with correct solutions
The attending veterinarian asks you to administer 120 mg of enrofloxacin (Baytril) IV slow over
20 minutes to a dog that is hospitalized in your clinic. The strength of injectable enrofloxacin is
2.27%, how many milliliters of drug will you administer? ✔✔Answer: 5.3 ml
A 2.27% solution is 22.7 mg/ml. 120 mg divided by 22.7 mg/ml = 5.3 mls
A 120-pound Great Dane has presented with Gastric Dilatation Volvulus. The clinician has asked
you to quickly prepare the drug protocol. As a premedication, the dog is to receive 0.08 mg/kg of
Hydromorphone. How many milligrams will you administer? ✔✔Answer: 4.4 mg
To calculate milligrams administered the dog's body weight should be converted to kilograms.
As a general rule, the majority of medications are dosed in a milligram-per-kilogram dosing.
Therefore all body weights need to be converted to kilograms so that you are working in the
same units.
120 lb/2.2 = 54.5 kg (There are 2.2 lbs per kilogram)
,54.5 kg x (0.08 mg/kg) = 4.4 mg (Notice the "kg" will cancel out when you do the math)
If your answer was 9.6 mg, you did not convert the body weight into kilograms.
How many milligrams are in 100 ml of a 3% solution? ✔✔Answer: 3,000 mg
A 3% solution is equal to 30 mg/mL.
Now take 100 mL X 30 mg/mL = 3000 mg= 3 grams (since there are 1000 mg in 1 gram)
How many milliliters should be administered to a 100-kg patient that needs 50 mg of a 2.5%
solution? ✔✔Answer: 2 ml
Percent is equal to weight (in Grams) / 100 parts volume (in mLs)
(This is based on water since 1 mL weighs 1 Gram):
Example: A 3% solution: 3 Grams / 100 mL or 3000 mg / 100 mL or 30 mg/mL
The easiest way to remember is to just add a zero onto any percentage for the milligrams (i.e. 2%
solution = 20 mg/ml; 10% solution = 100 mg/ml, etc.)
In this situation a 2.5% solution is equivalent to 25 mg/ml. Therefore:
, 50 mg / (25 mg/ml) = 2 ml
A 4-kg puppy is in need of subcutaneous fluids due to dehydration. The doctor prescribed a dose
of 20 ml/kg. How many milliliters should this patient receive? ✔✔Answer: 80 ml
To obtain the answer the following math should have been performed:
4 kg x (20 ml/kg) = 80 ml
Notice the kilograms were canceled out.
A dog presents with a history of coughing and rapid breathing. Radiographs confirm congestive
heart failure (see image). You are asked to administer 2 mg/kg of furosemide IV. The
concentration of furosemide is 50 mg/mL. The dog weighs 25 pounds. How many milliliters
should you administer to this patient? ✔✔Answer: 0.44 mL
The dog is 25 pounds.
25 pounds/2.2 pounds per kg= 11.3 kg
