Dose
Calculate the single dose in mL for the following O/L:
DrugA 0.275g tid
Available: 250mg/5mL
0.275g = 275mg.
? : 275mg :: 5mL : 250mg.
? = 275mg * 5mL / 250mg = 5.5mL
How long will the following RX last:
DrugF 250mg/5mL, Mitte: 100mL
Sig: 7.5mL BID
7.5mL * 2 = 15mL per day.
100mL / 15mL = 6.67.
For day supply, you always round down. So 6 days
Convert the following to Arabic numbers:
XLVII
X=10, L=50. 50-10 = 40.
V=5, I=1. 5+1+1=7.
40 + 7 = 47
A patient is experiencing anaphylaxis and is ordered to receive DrugN 0.01ml/kg. The patient weighs 143 lbs. How many ml are needed to administer this dose?
Remember, 1kg = 2.2lbs.
143lbs / 2.2 = 65kg.
0.01mL/kg * 65kg = 0.65ml
How many tsp are in 4 tbsp?
1tbsp = 3tsp. 4*3 = 12 tsp
Calculate the daily dose in tsp for the following O/L:
DrugB 175mg bid x 7d
Available: 50mg/5mL, pack size 125mL
175mg bid = 350mg for one day. 5mL = 1 tsp.
? : 350mg :: 1tsp : 50mg.
? = 350mg * 1 tsp / 50mg = 7 tsp
What is the day supply for the following RX:
DrugG 1mg/mL, Mitte 150mL
Sig: 2 tsp QAM
2 tsp = 10mL per day.
150mL / 10mL = 15 days
A label reads: “Take ʒss PO at bedtime.”
How many mL should the patient take per dose?
ʒ = 5mL. ss = 1/2.
5mL * 1/2 = 2.5mL
A 6-year-old child is receiving DrugO. The order is for 4.5mg/kg every 6 hours. The child weighs 44 lbs. What is the daily dose in grams for this patient?
4.5mg/kg q6h = 18mg/kg per day.
Weight in Kg = 44 / 2.2 = 20kg.
18mg/kg * 20kg = 360mg = 0.36g.
How many 2 tsp doses are in 5 fl oz of liquid medication?
5 fl oz = 5 * 30mL = 150mL. 2 tsp = 10mL.
150/10 = 15 doses
Calculate the single dose in mL for the following O/L:
DrugC 0.075 mg od. Mitte: 30mL
Available: 50 mcg/mL
0.075mg = 75mcg.
? : 75mcg :: 1mL : 50 mcg.
? = 1mL * 75mcg / 50mcg = 1.5mL
How long will the following RX last:
DrugH 0.4mg/mL, Mitte: 210mL
Sig: 2mg tid
Daily dose = 2mg * 3 = 6mg.
Total dispensed DrugH = 0.4mg/mL * 210mL = 84mg.
84mg/6mg = 14 days
You need to compound a DrugL oral liquid with 0.25g DrugL with water qs ad ʒxx.
How much mL of Drug O/L can you dispense?
qs ad shows the total volume of liquid.
ʒxx = 5mL * 20 = 100mL
DrugP 5mcg/lbs is ordered for a patient in shock who weighs 105kg. How many milligrams is that?
Weight = 105 * 2.2 = 231lbs.
5mcg/lbs * 231lbs = 1155mcg = 1.155mg
What is 84°F converted to Celsius?
(84°F - 32) * 5/9 = 28.9°C
Calculate the single dose in mL for the following O/L:
DrugD 175 mg tid x 7 d
Available: 2.5% liquid
2.5% = 2.5g/100mL = 2500mg/100mL = 25mg/mL.
? : 175mg :: 1mL : 25mg.
? = 175mg * 1mL / 25mg = 7mL.
How long will the following RX last:
DrugJ 80mg/mL, Mitte: 300mL
Sig: ʒiss qid
Daily dose = ʒiss * 4 = 7.5mL * 4 = 30mL.
300mL / 30mL = 10 days
Convert the following to Arabic numbers:
MMMCMXC
MMM=1000+1000+1000=3000.
CM=1000-100=900.
XC=100-10=90. 3990
What is the daily dose (in micrograms) of DrugQ if doctor orders 0.025mg/kg DrugQ dose od. The patient is a 176-pound man with arrhythmia?
Weight = 176 / 2.2 = 80kg.
80kg * 0.025mg/kg = 2mg = 2000mcg.
A patient presents in the emergency room with a fever of 41°C. What is the patient's temperature in Fahrenheit?
41° C / (5/9) + 32 = 105.8°F
A mother needs to administer DrugE 600 mg to her child to reduce fever. It is available as
DrugE 200 mg/½ tsp. How many ml should she administer?
½ tsp = 2.5mL.
? : 600mg :: 2.5mL : 200mg.
? = 600mg * 2.5mL / 200mg = 7.5mL
How long will the following RX last:
DrugK 5mg/mL, Mitte: ℥v
Sig: 5.5mL bid prn
Daily dose = 5.5mL * 2 = 11mL.
Total dispensed = ℥v = 30mL * 5 = 150mL.
150mL / 11mL = 13.63 days, which rounds down to 13 days
How long will this medication last for the following Rx:
DrugM 5mg/mL, Mitte: ℥iiiss
Sig: 5.5mL hs prn
℥iiiss = 30mL * 3.5 = 105mL.
105/5.5 = 19.09 = 19 days
An 8-year-old child who weighs 82lbs is scheduled to receive DrugR 25mg/kg/day divided into three doses. How many milligrams will the child receive for one dose?
Weight in kg = 82/2.2.
Since 25mg/kg is daily dose, each dose is 25/3 per kg.
Therefore, (82/2.2) * (25/3) = 310.6mg.
Doctor orders DrugZ qid x 2d. If you dispensed ℥vii of liquid DrugZ, how many mL should the patient take per dose?
7 ounce for 2 days = 3.5 ounce per day.
Daily dose = 3.5 * 30mL = 105mL.
105mL/4 = 26.25mL