DOSAGE CALCULATIONS PRACTICE EXAM QUESTIONS AND
ANSWERS GRADED A+ 100% VERIFIED.
1. Order ANS >> Biaxin 200 mg p.o. q 12 h for a child who weighs
45 lbs. Have ANS >> Biaxin 125 mg per 5 mL
Biaxin label states 15 mg/kg/day in two equal doses.
Is this dosage safe? ANS >> 1. Convert lbs to kgs. 45lbs = 20.5 kg
2. Calculate the recommended dose per day. A child weighing 20.5 kg can have
307.5 mg PER DAY. So, divide 307.5 by 2 to get a single dose. So, the maximum
single dose is 153.75 mg.
,3. NO, the ordered dose is not safe. The doctor ordered 200 mg which is more than
153.75 mg.
2. How many mcg in a mg? ANS >> 1000
3. Order ANS >> D5LR 1250 mL IV over 8 hours.
What is the infusion rate in mL/h? ANS >> Answer ANS
>> 156 mL/h Divide 1250 by 8
156.25 => 156
4. Order ANS >> Amoxil 200 mg q 8 h
Have ANS >> 50 mg/ml
Label ANS >> 20 to 40 mg/kg/day in divided doses every 8 hours.
The patient weighs 10 kg. Is this order safe? ANS >> 1. First, calculate the
minimum and maximum dose per day. The minimum amount would be 200 mg. (20
x 10) The maximum amount would be 400 mg. (40 x 10)
,2. Now, since the dose is given every 8 hours, divide the minimum and maximum
by 3, since 3 doses can be given in one day (24 hours). The minimum single dose
is 66.7 mg, and the maximum single dose is 133.3 mg.
3. NO, the ordered dose is not safe. The doctor ordered 200 mg for a single dose
which is more than the maximum allowed single dose of 133.3 mg.
5. How many mL in a teaspoon (tsp)? ANS >> 5
6. How many grams are in a kilogram? ANS >> 1000
7. How many teaspoons are in a tablespoon? ANS >> 3
, 8. How many ounces are in a pound? ANS >> 16
9. How many pounds are in a kilogram? ANS >> 2.2
10. Convert 21.3 kg to lbs. ANS >> 46.86
11. Tridil is infusing at 15 mL/hr on an infusion pump. The drug is mixed 50
mg in 500 mL DsW. How many mcg/min is the patient receiving? ANS >>
Answer ANS >> 25 mcg/min
First, convert the 50 mg to mcg. 50 mg = 50,000 mcg
Now, how many mcg is in 1 mL?
50,000 mcg/500 mL = 100 mcg/mL
Now, how many mcg/hr is the pt receiving?
100 mcg x 15 mL = 1,500 mcg/hr
So, 1500 mcg/60 min = 25 mcg/min
12. How many mL in a tablespoon (T or tbs)? ANS >> 15
ANSWERS GRADED A+ 100% VERIFIED.
1. Order ANS >> Biaxin 200 mg p.o. q 12 h for a child who weighs
45 lbs. Have ANS >> Biaxin 125 mg per 5 mL
Biaxin label states 15 mg/kg/day in two equal doses.
Is this dosage safe? ANS >> 1. Convert lbs to kgs. 45lbs = 20.5 kg
2. Calculate the recommended dose per day. A child weighing 20.5 kg can have
307.5 mg PER DAY. So, divide 307.5 by 2 to get a single dose. So, the maximum
single dose is 153.75 mg.
,3. NO, the ordered dose is not safe. The doctor ordered 200 mg which is more than
153.75 mg.
2. How many mcg in a mg? ANS >> 1000
3. Order ANS >> D5LR 1250 mL IV over 8 hours.
What is the infusion rate in mL/h? ANS >> Answer ANS
>> 156 mL/h Divide 1250 by 8
156.25 => 156
4. Order ANS >> Amoxil 200 mg q 8 h
Have ANS >> 50 mg/ml
Label ANS >> 20 to 40 mg/kg/day in divided doses every 8 hours.
The patient weighs 10 kg. Is this order safe? ANS >> 1. First, calculate the
minimum and maximum dose per day. The minimum amount would be 200 mg. (20
x 10) The maximum amount would be 400 mg. (40 x 10)
,2. Now, since the dose is given every 8 hours, divide the minimum and maximum
by 3, since 3 doses can be given in one day (24 hours). The minimum single dose
is 66.7 mg, and the maximum single dose is 133.3 mg.
3. NO, the ordered dose is not safe. The doctor ordered 200 mg for a single dose
which is more than the maximum allowed single dose of 133.3 mg.
5. How many mL in a teaspoon (tsp)? ANS >> 5
6. How many grams are in a kilogram? ANS >> 1000
7. How many teaspoons are in a tablespoon? ANS >> 3
, 8. How many ounces are in a pound? ANS >> 16
9. How many pounds are in a kilogram? ANS >> 2.2
10. Convert 21.3 kg to lbs. ANS >> 46.86
11. Tridil is infusing at 15 mL/hr on an infusion pump. The drug is mixed 50
mg in 500 mL DsW. How many mcg/min is the patient receiving? ANS >>
Answer ANS >> 25 mcg/min
First, convert the 50 mg to mcg. 50 mg = 50,000 mcg
Now, how many mcg is in 1 mL?
50,000 mcg/500 mL = 100 mcg/mL
Now, how many mcg/hr is the pt receiving?
100 mcg x 15 mL = 1,500 mcg/hr
So, 1500 mcg/60 min = 25 mcg/min
12. How many mL in a tablespoon (T or tbs)? ANS >> 15
