BASIC MED MATH

1. Scenario: Mr. Larsen’s general practioner advised him to 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. 2g x 1,000mg 1g =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. 24hours x 1dose 6hours=4doses 2. Multiply the number of doses by the number of milligrams per dose. 4 doses x 50mg 1dose =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)=1tablet 2. Plug into the equation and solve. This study source was downloaded by from CourseH on :20:43 GMT -05:00 BASIC MED MATH 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. 2g x 1,000mg 1g =2,000mg 2. Determine how many 325mg tablets go into 2,000mg. 2,000mg x 1tablet 325mg =6.15 tablets 3. Consider that the dosage may not exceed 2,000mg, and you may only administer whole tablets. Round down¿ thewhole 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 This study source was downloaded by from CourseH on :20:43 GMT -05:00 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: This study source was downloaded by from CourseH on :20:43 GMT -05:00 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 1kg 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. 24hours x 1dose 4hours =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.