NUR 112 Basic Medmath SHADOW HEALTH
Shadow Health Basic Med Math Bryana Patton
11/2/2018
1. Scenario: Mr. Larsen’s general practioner advised him to
... [Show More] take 2g of fish oil per day. The capsule
Mr. Larsen purchased are 1,000mg.
Question: How Many Fish Oil capsules should be take each day?
Work:
1. Convert the doctor’s recommendation of 2g into milligrams.
2 g x 1,000mg
1 g
=2,000mg
2. Determine how many fish pill capsules Mr. Larsen should take to ingest 2,000mg
1 capsule
1,000mg
x2,000mg=2 capsules
Answer: 2 capsules
2. Scenario: Before his surgery, Mr. Larsen was taking Tramadol, prescribed as 50mg by mouth
every 6 hours as needed for pain.
Question: If he took every available dose in 24 hours, how many mg of Tramadol would he
ingest?
Work:
1. Determine how many times in 24 hours Mr. Larsen took a dose.
24 hours x 1 dose
6 hours
=4doses
2. Multiply the number of doses by the number of milligrams per dose.
4 doses x 50mg
1 dose
=200mg
Answer: 200mg
3. Scenario: While in the hospital, the orders all for MR. Larsen to take atorvastatin 20mg, 1 tab, by
mouth once a day. However, the pharmacy only carries 10 mg tablets.
Question: How many tablets of atorvastatin should be administered to him?
Work:
1. Determine what information you have.
D(ordered dose )=20mg
H (doseon hand )=10mg
Q(quantity)=1 tablet
2. Plug into the equation and solve.
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NUR 112 Basic Medmath SHADOW HEALTH
Shadow Health Basic Med Math Bryana Patton
11/2/2018
D(20mg)
H(10mg)
x1 tablet=X , X=2tablets
Answer: 2 tablets
4. Scenario: The Davis’s Drug Guide reports a potential drug-drug interaction with acetaminophen
and warfarin. IF a patient is taking warfarin, mora than 2g/day of acetaminophen may increase
bleeding. Because Mr. Larsen is ordered both, he should receive no more than 2g/day of
acetaminophen.
Question: If Mr. Larsen takes acetaminophen 325mg, 2 tabs, by mouth every 4 hours for mild
pain. What is the maximum number of tablets you can give him so that he doesn’t exceed
2g/day? (Assume you will only give him whole tablets.)
Work:
1. Determine how many milligrams are in 2 grams.
2 g x 1,000mg
1 g
=2,000mg
2. Determine how many 325mg tablets go into 2,000mg.
2,000mg x 1 tablet
325mg
=6.15 tablets
3. Consider that the dosage may not exceed 2,000mg, and you may only administer whole
tablets.
Round down¿ the whole number of tablets=6
Answer: 6 Tablets
5. Scenario: At 0800, Mr. Larsen reports a moderate pain level of 5, and so you administer
oxycodone 5mg/ acetaminophen 325mg, 1 tab, by mouth. At 1200, Mr. Larsen reports mild pain
rated 3, so you administer acetaminophen 325mg, 2 tabs, by mouth.
Question: At this point, how many acetaminophens have Mr. Larsen taken?
Work:
1. Determine how many mg of acetaminophen Mr. Larsen has taken each time.
325mg at 0800
650mg at 1200
2. Add the two amounts together:
325mg+650mg=975mg
Answer: 975mg
6. Scenario: In Mr. Larsen’s orders, the enoxaparin is prescribed for prophylaxis of DVT following
knew replacement surgery, and he is ordered 30mg by subcutaneous injection every 12 hours.
Suppose the pharmacy stocks multi-use vials of 300mg/3ml enoxaparin.
Question: How much will you need to draw up to administer a 30mg dose?
Work:
1. Determine what information you have.
D(ordered dose )=30mg
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Shadow Health Basic Med Math Bryana Patton
11/2/2018
H (doseonhand )=300mg/3ml
2. Remember that:
1
300mg/3ml
= 3ml
300mg
3. Plug into the equation and solve.
30mg= 3ml
300mg
=0.3ml
Answer: 0.3ml
7. Scenario: For patients with unstable angina, a potential treatment is enoxaparin administered by
subcutaneous injection 1mg/kg every 12 hours. Suppose Mr. Larsen were being treated for
unstable angina.
Question: If Mr. Larsen weighs 227 lbs. How much enoxaparin should be administered? Round
you answer to the nearest whole number.
Work:
1. Convert pounds (lbs.) to kilograms (kg).
227÷ 2.2=103.18 kg
2. Multiply dosage by the number of kilograms.
1mg
1kg
x 103.18 kg=103.18mg , rounded ¿103mg
Answer: 103mg
8. Scenario: For patients with unstable angina, a potential treatment is enoxaparin administered by
subcutaneous injection 1mg/kg every 12 hours. Suppose Mr. Larsen was being treated for
unstable angina.
Question: If Mr. Larsen weighed 180 lbs. How much enoxaparin should be administered? Round
your answer to the nearest whole number.
Work:
1. Convert pounds to kilograms.
180÷2.2=81.81 kg
2. Multiply dosage by the number of kilograms.
1mg
1kg
x 81.81 kg=81.81mg , rounded ¿82mg
Answer: 82mg
9. Scenario: For patients with deep vein thrombosis or pulmonary embolism, a potential treatment
is enoxaparin administered 1.5mg/kg once daily by subcutaneous injection. Suppose Mr. Larsen
was being treated for a pulmonary embolism and weighed 227 lbs.
Question: How much enoxaparin should he be administered each day? Round your answer to
the nearest whole number.
Work:
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Shadow Health Basic Med Math Bryana Patton
11/2/2018
1. Convert pounds to kilograms.
227÷ 2.2=103.18 kg
2. Multiply dosage by the number of kilograms.
1.5mg
1 kg
x 103.18 kg=154.77,rounded ¿155mg
Answer: 155mg
10. Scenario: For moderate pain, Mr. Larsen can take oxycodone 5mg/acetaminophen 325mg, 1 tab,
every 4 hours. Suppose he takes all available doses in 4 hours?
Question: How many doses of oxycodone will he have ingested?
Work:
1. Determine how many times in 24 hours Mr. Larsen would take a dose.
24 hours x 1 dose
4 hours
=6doses
2. Multiply the dosage of oxycodone by the number of tablets.
6 tablets x 5mg=30mg
Answer: 30mg
11. Scenario: Suppose Mr. Larsen is in severe pain, and the Prescriber’s order allows oxycodone
5mg/acetaminophen 325mg, 2 tabs, every 4 hours. He takes all available doses in 24 hours.
Question: How many mg of oxycodone will he have ingested?
Work:
1. Determine how many doses Mr. Larsen would take in 24 hours.
24 hours x 1 dose
4 hours
=6doses
2. Multiply the dosage by the number of tablets per dose.
6 doses x 2table ts
1dose
=12 tablets
3. Multiply the dosage of oxycodone by the number of tablets.
12tablets x 5mg
1tablet
=60mg
Answer: 60mg
12. Scenario: Mr. Larsen is ordered 2mg of warfarin. The pharmacy only stocks 1mg tablets.
Question: how many tablets of warfarin should be administered to him?
Work:
1. Determine what information you have.
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Shadow Health Basic Med Math Bryana Patton
11/2/2018
D(ordered dose )=2mg
H (doseonhand )=1mg
Q(quanity)=1tablet
2. Plug into the equation and solve.
D(2mg)
H(1mg)
x1 tablet=X , X=2 tablets
Answer: 2 tablets
13. Scenario: Mr. Larsen reports constipation. The attending physician prescribed docusate sodium
syrup 100mg PO BID. The concentration is 50mg/5ml.
Question: How many of docusate sodium syrup should you administer to Mr. Larsen?
Work:
1. Determine what information you have.
D(ordered dose )=100mg
H (doseonhand )=50mg
5ml
2. Remember that:
1
50mg/5ml
= 5ml
50mg
3. Plug into the equation and solve.
100mg x 5ml
50mg
=10ml
Answer: 10ml
14. Scenario: Mr. Larsen returns home and starts to come down with a cough. He would like to take
Mucinex Cold & Flu syrup, which contains acetaminophen 650mg/guaifenesin
400mg/phenylephrine HCL mg per 20ml dose.
Question: Assume Mr. Larsen takes two 20 ml doses of Mucinex per day. How many mg of
acetaminophen will he have ingested from the Mucinex?
Work:
1. Multiply the dosage of acetaminophen by the number of doses taken.
650mg
1dose
x 2dosestaken=1,300mg
Answer: 1,300mg
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