Practice Problems for Drug Calculations Flashcards
1 ounce=___mL
30 mL
1/2 tsp=___mL
2.5 mL
1 mg=___microgram (mcg)
1,000 microgram (mcg)
1.5 liters=___mL
1500 mL
3.5 kg=___pounds
7.7 pounds
1 tbsp.=___tsp
3 tsp
1 quart=___ounces
33.3 ounces
1 tsp=___mL
5 mL
15 mL=___tbsp
1 tbsp
11 pounds=___kg
5 kg
400 mcg=___mg
0.4 mg
50 g=___mL
50 mL
1 cup=___mL
240 mL
74 kg=___pounds
162.8 pounds
Ordered: 2 g Amoxicillin. On hand is Amoxicillin 500 mg capsules. How many do you give?
4 tablets
Ordered: Nitroglycerine 0.04 mg sl every 5 minutes for chest pain. Three tablets were given. What is the total dose given?
0.12 mg
Ordered: Lanoxin (digoxin) 0.125 mg orally. On hand are Lanoxin 0.25 mg tablets. How much do you give?
1/2 tablet.
Ordered: Enalapril 7.5 mg. Pharmacy sends up 3 tablets, each labeled Enalapril 2.25 mg with instructions to give all three tablets. Is this the correct dose? Show your work to support your answer.
6.75 mg. No.
Ordered: Demerol 50 mg IM for pain. On hand is Demerol 100 mg in 1 mL. How much do you give?
0.5 mL
Ordered: Tylenol 64 mg. Pharmacy sends Tylenol 160 mg in 5 mL. How much do you give?
2 mL
Ordered: Morphine sulfate 4 mg for pain. On hand is Morphine sulfate 2 mg in 1 mL. How much do you give in mL?
2 mL
Ordered: Dexamethasone 8 mg. On hand is Dexamethasone 5 mg in 1 mL. How much do you give in mL?
1.6 mL
Ordered: Coumadin 7.5 mg. On hand is Coumadin 5 mg tablets. How much do you give?
1 1/2 tablets.
Tablets are labeled 0.01 mg. Dosage ordered is 0.02 mg.
2 tablets
Tablets are labeled 2.5 mg. You must give 5 mg.
2 tablets.
Tablets are labeled 0.25 mg. You must give 0.125 mg.
1.2 tablet.
A dosage of 1.8 mg is ordered. Tablets are labeled 0.6 mg.
3 tablets
Prepare a dosage of 3.2 mg, using tablets labeled 1.6 mg.
2 tablets
You are to administer 4 tablets with a dosage strength of 0.04 mg each. What total dosage are you giving?
0.2 mg
You have given 2.5 tablets with a strength of 1.25 mg each. What total dosage was given?
3.1 mg
The tablets your patient is to receive are labeled 0.01 mg. You are to give 3.5 tablets. What total dosage are you giving?
0.04 mg
You administered 3 tablets to your patient. The tablets were labeled 0.75 mg each. The dosage ordered was 2.25 mg. Did your patient receive the correct dosage?
2.25 mg. Yes.
The dosage ordered for your patient was 4.5 mg. The tablets are labeled 3.5 mg. The pharmacy sent 2.5 tablets to be given. Will this be the correct dosage?
8.75 mg. No.
X = 0.08/0.65 x 1.2 =___
1.5
X = 350/1000 x 4.4 =___
1.5
X = 1.3/0.95 x 0.5 =___
0.7
X + 30/10 x 3 =___
9.0
X = 0.35/1.3 = x 4.5 =___
1.2
X = 135/100 x 2.5 = ___
3.4
X = 0.15/0.1 x 1.3
2.0
X = 320/150 x 1 =___
2.1
X = 0.4/1.5 x 2.3 =___
0.6
X = 0.08/0.8 x 4 =___
0.4
75mg in 5 ml = 187.5 mg in X mL
12.5 mL
7500 u in 1.5 mL = 10,000 u in X mL
2 mL
17 mg in 3 tab = 42.5 mg in X tab
7.5 tablets
0.25 mg in 0.08 mL = 0.75 mg in X mL
0.2 mL
55 mg in 1.1 mL = 165 mg in X mL
3.3 mL
14.2 mg in 1.3 mL = 12.1 mg in X mL
1.1 mL
250 u in 2.3 mL = 325 u in X mL
3 mL
50 mg in 1 tab = 75 mg in X tab
1 1/2 tablets
0.02 mg in 1.2 mL = 0.05 mg in X mL
3.0 mL
350 mg in 1.6 mL = 175 mg in X mL
0.8 mL
A 50 mg dosage has been ordered. The strength available is 60 mg in 1.5 mL.
1.3 mL
Prepare a dosage of 300 mcg. The dosage available is 0.4 mg/mL.
0.8 mL
The dosage ordered is 0.45 g. The vial supplied is 300 mg/mL.
1.5 mL
The medication supplied is labeled 5 mg/mL. An 8 mg dose is ordered.
1.6 mL
Prepare a 70 mg dosage from a solution labeled 250 mg in 5 mL.
1.4 mL
The drug is labeled 25 mg per mL. 30 mg has been ordered.
1.2 mL
The label reads 50 mg/mL. Prepare a 60 mg dose.
1.2 mL
The order is for 12 mg. The vial is labeled 5 mg per mL.
2.4 mL
The dosage ordered is 7 mg. The vial label reads 10 mg per mL.
0.7 mL
The solution strength is 10 mg/1mL. 8 mg is ordered.
0.8 mL
Order: phenobarbital gr 1/2 PO daily for convulsions.
Oh hand: 20 mg/5 mL.
How many mL will you give?
7.5 mL
Order: Zantac 0.15 g PO bid for ulcers.
Oh hand: 15 mg/mL
How many tsp will you give?
2 tsp
Order: Dilaudid 3 mg PO every 3 hour PRN for pain.
On hand: Dilaudid Liquid 1 mg/mL
How many mL will you give?
3 mL
Order: lactulose 20 g PO tid for hepatic encephalopathy.
On hand: lactulose 10 g/15 mL
How many oz will you give?
1 oz
The physician orders Tigan, 0.2 g IM qid, for nausea.
The dosage of medication on hand is a multiple-dose vial labeled 100 mg/mL.
How many mL will you give?
2 mL
A physician orders Thorazine, 50 mg tid, prn for singultus.
The dose on hand is Thorazine 25 mg tablets.
How many tablets will you give?
2 tablets
Order: Orinase, I g PO bid, for type II diabetes mellitus.
How many tablets will you give?
(500 mg each)
2 tablets
Order: Persantine, 50 mg PO qid, for prevention of thromboembolism.
How many tablets will you give?
(25 mg each)
2 tablets
Order: NPH insulin, 56 units SQ, every AM for type I diabetes mellitus.
On hand: NPH insulin 100 units/mL.
How many units will you give?
56 units
Order: heparin, 7500 units SQ bid, for prevention of thrombi.
On hand: heparin 10,000 units/mL
How many mL will you give?
- 8 mL
0. 75 mL
Order: Compazine, 10 mg PO bid, for emotional disturbance.
How many capsules will you give?
(10 mg each)
1 capsule
Order: meperidine, 50 mg IM, every 3 hours prn for pain.
On hand: meperidine 100 mg/mL.
How many mL will you give?
0.5 mL
The health care provider orders hydromorphone, 3 mg I.V. q6h p.r.n., for a patient with postoperative pain. The medication is available in a prefilled syringe containing 4 mg per millimeter. How many millimeters of hydromorphone should you waste?
0.25 mL
The health care provider orders heparin, 8,000 units subQ q8h, for a patient with deep vein thrombosis. The heparin available is 20,000 units per 1 mL. How many milliliters of heparin should you give?
0.4 mL
A physician prescribes 45 units of NPH insulin to be given to a patient with type 1 diabetes mellitus subQ in the morning daily. You have NPH insulin, 100 units/mL, available. Using a U-100 syringe, how many milliliters will be in the syringe?
0.45 mL
A patient diagnosed with pneumonia needs 2,000 mL of fluid over 24 hours. What’s the flow rate?
83 mL/hour
A 4-year-old patient weighs 46 pounds. How many kilograms is this?
21 kg
The health care provider orders a single dose of oral suspension acetaminophen, 10 mg/kg/dose, for a feverish child who weighs 6 kg. What’s the dose in milligrams?
60 mg
Doctor orders Ampicillin 500 mg IM. The pharmacy sends a vial of ampicillin labeled 1g/mL. How many mL will the nurse give?
5 mL
The physician orders Amikacin 0.25g IM q 12 hr. It is available 1g/4mL. How many mL will the nurse administer per dose? Per day?
2 mL
Carvediol 12.5 mg p.o. bid is ordered for your patient. Pharmacy sends dose of Carveldilol 6.25 mg per tablet. How many will you give?
2 tablets
Mirapex 1500 mg is ordered t.i.d. for a patient. The nurse has Mirapex 0.5 g tablets. How many tablets will the nurse administer this morning? All day?
3 tablets that morning.
9 tablets all day.
The patient is to receive 20 mEq of KCL p.o. q am. The pharmacy sends a bottle labeled 30 mEq/15 mL. How many mL will the nurse administer?
10 mL
Aluminum hydroxide suspension 15 mL is ordered q.i.d. The pharmacy sends a bottle of aluminum hydroxide 320 mg/5 mL. How many mg is the patient receiving per day?
3840 mg
The order is for 400mcg, 1 tab 30 min before surgery. The pharmacy sends atropine 0.4mg tablets. How many tablets will the nurse give?
1 tablet
Morphine sulfate oral solution 120 mg q 4 hr around the clock, is ordered for a patient in hospice care. Morphine sulfate is available in 100 mg/5 mL. How many mg morphine sulfate will the patient receive per day?
720 mg
Celor oral suspension 375 mg q 8 hr is ordered for a patient on discharge. The patient has a prescription for Ceclor 125 mg/5 mL oral suspension. How many tablespoons will the nurse instruct the patient to take per dose?
1 tbsp.
The order is for 3 mg/kg daily. Patient weighs 87 kg. How many mg does nurse administer per dose if it is ordered t.i.d.
261 mg
Doctor orders Ancef 1 g daily in 4 divided doses. How much will the nurse give per dose?
250 mg
Order: tolbutamide 250 mg p.o. b.i.d.
Supply: tobutamide 0.5 g tablets
Give:___tablet(s)
1/2 tablet
Order: codeine gr 1/2 p.o. q. 4h p.r.n., pain
Supply:codeine 15 mg tablets
Give:___tablet(s)
2 tablets
Order: Synthroid 0.075 mg p.o. daily
Supply: Synthroid 150 mcg tablets
Give:___tablet(s)
1/2 tablet
Order: phenobarbital gr 1/6 p.o. t.i.d.
Supply: phenobarbital elixir 20 mg per 5 mL
Give:____mL
2.5 mL
Order: Keflex 500 mg p.o. q.i.d.
Supply: Keflex 250 mg per 5 mL
Give:___mL
10 mL
Order: Inderal 20 mg p.o. q.i.d.
Supply: Inderal 10 mg tablets
Give:___tablet(s)
2 tablets
Order: Amoxil 400 mg p.o. q.6h
Supply:Amoxil 250 mg per 5 mL
Give:___mL
8 mL
Order: Diabenese 150 mg p.o. b.i.d.
Supply: Diaenese 100 mg tablets
Give:___tablet(s)
1 1/2 tablets
Order: Aspirin gr v p.o. daily
Supply: Aspirin 325 mg tablets
Give:___tablet(s)
1 tablet
Order: codeine gr 1/4 p.o. daily
Supply: codeine 30 mg tablets
Give:___tablet(s)
1/2 tablet
Order: Inderal 30 mg p.o. q.i.d.
Supply: Inderal 20 mg tablets
Give:___tablet(s)
1 1/2 tablet
Order: Synthroid 300 mcg p.o. daily
Supply: Snthroid 0.3 mg tablets
Give:___tablet(s)
1 tablet
Order: Lasix 60 mg p.o. daily
Supply: Lasix 40 mg tablets
Give:___tablet(s)
1 1/2 tablets
Order: Tylenol with (c with line on top) codeine gr 1/8 p.o. daily
Supply: Tylenol with 7.5 mg codeine tablets
Give:___tablet(s)
1 tablet
Order: penicillin G 400,000 units p.o. q.i.d.
Supply: penicillin G 200,000 unit tablets
Give:___tablet(s)
2 tablets
Order: Vasotec 7.5 mg p.o. daily
Supply: Vasotec 5 mg tablets
Select:____mg tablets
and give___tablet(s)
5 mg tablets
1 1/2 tablets
Order Penicillin VK 375 mg p.o. q.i.d.
Supply: Penicillin VK 250 mg per 5 mL
Give:___mL
7.5 mL
Order: Neomycin 1 g p.o. q6h
Supply: Neomycin 500 mg tablets
Give:___tablet(s)
2 tablets
Order: Halcion 0.25 mg p.o. bedtime
Supply: Halcion 0.125 mg tablets
Give:___tablet(s)
2 tablets
Order: Roxanol 30 mg p.o. q. 4h p.r.n., pain
Supply: Roxanol 20 mg/mL
Give:___mL
1.5 mL
Order: dexamethasone 750 mcg p.o. b.i.d.
Supply: dexamethasone 0.75 mg and 1.5 mg tablets
Select:___mg tablets
Give:___tablet(s)
0.75 mg tablets
1 tablet
Order: Edecrin 12.5 mg p.o. b.i.d.
Supply: Edecrin 25 mg tablets
Give:___tablet(s)
1/2 tablet
Order: Urecholine 50 mg p.o. t.i.d.
Supply: Urecholine 25 mg tablets
Give:___tablet(s)
2 tablets
Order: Erythrocin 0.5 g p.o. q.12h
Supply: Erythrocin 250 mg tablets
Give:___tablet(s)
2 tablets
Order: glyburide 2.5 mg p.o. daily
Supply: glyburide 1.25 mg tablets
Give:___tablet(s)
2 tablets
Order: Tranxene 7.5 mg p.o. q.AM
Supply: Tranxene 3.75 mg capsules
Give:___capsules
2 capsules
Order: phenobarbital gr 3/4 p.o. daily.
Supply: phenobarbital 15 mg, 30 mg, and 60 mg scored tablets.
Selected:___mg tablets.
Give:___tablet(s)
15 + 30 mg tablets
1 tablet of each
Order: acetaminophen 240 mg p.o. q.4h p.r.n.., pain or T greater than 102 degrees F
Supply: acetaminophen drops 80 mg per 0.8 mL
Give:____mL
2.4 mL
Order: acetaminophen 160 mg p.o. q.4h p.r.n., pain or T greater than 102 degrees F
Supply: acetaminophen liquid 160 mg/t
Give:___mL
5 mL
Order: Coumadin 7.5 mg p.o. daily
Supply: Coumadin 2.5 mg tablets
Give:___tablet(s)
3 tablets
