Med Math Practice
42
A patient has a primary IV of dextrose in water 1,000 mL to be infused over 24 hours. What would be the drip rate (gtts/min) using tubing with a drop factor of 60? Fill in the blanks and record your answer using a whole number. _____ gtts/minute
2
A patient with heart failure has a daily order for digoxin (Lanoxin) 0.25 mg PO. Digoxin 0.125 mg tablets are available. How many tablet(s) should you give? Fill in the blanks. _____ tablet(s)
23
A patient with ventricular fibrillation is prescribed with bretylium 5 mcg/kg/minute. The medication comes mixed 50 mg in 50 mL of 0.9 % normal saline. The patient's weight is 170 lbs. How much of the medication will you administer per hour? Fill in the blank and round off your final answer to a whole number. _____ mL/hr
96
A pediatric patient is ordered a medication dose of 100 mg/ m² a day by mouth for 5 days. The patient weighs 55 lbs. and is 4 feet 5 inches. What is the daily dose of medication the patient will receive?
10
The doctor orders 25 mg of an IV medication that needs to be reconstituted. The instructions say 50 mg of the medication is to reconstitute with normal saline for a solution of 2.5 mg/ml. How many mL will you draw up to achieve this ordered dose?
No, this is not a safe dose. A safe dose is 327.3-392.7 mg/day
The doctor orders a medication dose of 300 mg daily for a child that weighs 72 lbs. The safe dosage range for the ordered medication is 10-12 mg/kg/day. What is the safe dosage range for this child and is this a proper dose?
0.25
The doctor orders an IV bolus. The order says to administer IV now 12.5 mg. You are supplied with a via that is labeled 50mg/ml. How many ml will you draw up and administer per dose?
12.5
The doctor orders an IV weight-based medication to be infused at 12 mg/kg. The patient weighs 115 lbs. You are supplied with a bag of the IV medication that reads 100 mg/2mL. How many mL/hr will you administer?
21.6
The doctor orders an IV weight-based medication to be infused at 4 mcg/kg/min. The patient weighs 198 lbs. You are supplied with a bag of the IV medication that reads 250mg/250 ml. How many mL/hr will you administer?
13.2
A primary healthcare provider ordered ceftriaxone (Rocephin) for a 4-year old child with lower respiratory tract infection. The dose required is 20 mg/kg/day divided twice a day, administered per dose via IV. The child's weight is 29 lbs. The drug comes prediluted in a concentration of 10mg/ml. How much of the medication will you administer in mL? Fill in the blank and record your final answer using one decimal place. _____ mL
1.3
You have an order to administer 40 mg of methadone (Dolophine) SC for opioid detoxification. You have on hand 30 mg/mL. How much should you draw into the syringe? Fill in the blanks. Record your answer using one decimal place. _____ mL
27,000
27 mg = _____ mcg
30
6 tsp = _____ ml
1.2
A 12-year-old child was admitted to the emergency department because of an asthma attack. Upon assessment, you found out that the child's weight measures 82.4 lbs. The primary care provider ordered 2 mg/kg of methylprednisolone (Solu-Medrol). The available stock dose is 125 mg/2mL. How many mL will the nurse administer? Fill in the blank and record round off your final answer using one decimal place. _____ mL
40
A client suffering from chest discomfort and shortness of breath is brought to the emergency department due to acute angina pectoris. The healthcare provider orders IV nitroglycerin (Nitroglycerin) 75 mg in 500 mL of 5% Dextrose Water at 100 mcg/min. The nurse will set the pump at which rate (mL/hr)? Fill in the blank and write your answer using a whole number. _____ mL/hr
2.5
A health care provider orders amoxicillin syrup to a 3-year-old child with UTI. Your assessment reveals the following data: Temperature of 38.5º C Heart rate of 88 bpm Respiratory rate of 30 bpm Blood pressure of 90/50 Height of 98 cm Weight 12 kg (26.4 lbs) The dosage required as per order is 50 mg/kg/day divided into 3 doses per day (TID). Available stock is a suspension with a concentration of 400 mg/5mL. How much will you administer per dose? Fill in the blank and record your answer using one decimal place. _____ mL
1.5
A patient has a bottle of warfarin (Coumadin) 5 mg tablets at home. After his most recent international normalized ratio (INR), the doctor calls and tells him to take 7.5 mg/day. How many tablets (scored) should the patient take? Fill in the blanks and record your answer using one decimal place. _____ tablet(s)
2
You have available lorazepam (Ativan) 0.5 mg tablets, and you need to administer 1 mg PO. How many tablet(s) will you administer? Fill in the blanks. _____ tablet(s)
16
How many drops are in a teaspoon?
8
How many fluid ounces are in one cup?
16
How many fluid ounces are in one pint?
32
How many fluid ounces are in one quart?
15
How many mL are in a tablespoon?
5
How many mL are in a teaspoon?
240
How many mL are in one cup?
30
How many mL are in one fluid ounce?
480
How many mL are in one pint?
946
How many mL are in one quart?
16
How many ounces are in one pound?
2
How many pints are in one quart?
2.2
How many pounds are in one kilogram?
2
How many tablespoons are in one fluid ounce?
3
How many teaspoons are in a tablespoon?
28.8
The doctor orders your patient to start an IV Heparin drip at 16 units/kg/hr and to administer a loading bolus dose of 60 units/kg IV before initiation of the drip. You're supplied with a Heparin bag that reads 12,500 units/250 mL. The patient weighs 198 lbs. What is the flow rate you will set the IV pump (mL/hr)?
30
The doctor writes an order a liquid oral medication. The order says to administer 20 grams by mouth BID. Pharmacy dispenses you with 10 gram/15 ml. How many ml will you administer per dose?
1.5
The doctor writes an order for a liquid oral medication. The order says to administer 15 mg by mouth every 4 hours as needed for sore throat. Pharmacy dispenses you with 30 mg/3ml. How many ml will you administer per dose?
1
The doctor writes an order for a medication. The order says to administer 0.1 gram by mouth daily. Pharmacy dispenses you with 100 mg per tablet. How many tablets will you administer per dose?
2
The doctor writes an order for a medication. The order says to administer 12.5 mg PO BID. Pharmacy dispenses you with 6.25 mg tablets. How many tablets do you administer with this dose?
1
The doctor writes an order for an IV bolus. The order says to administer 20 mg IV BID. You're supplied with a vial that is labeled 40mg/ml. How many ml will the patient receive DAILY (NOT per dose)?
31
The doctor writes an order to infuse a solution. The order reads: "Infuse 1500 mL over 12 hours". The drip factor is 15 gtt/mL. How many drops per minute (gtts/min) will be administered?
13 hours and 20 minutes
The doctor writes an order to infuse a solution. The order reads: "Infuse 2 L at 150 mL/hr". How long will it take for the infusion to complete?
104
The doctor writes an order to infuse a solution. The order reads: "Infuse 2,500 mL over 1 day.". What is the hourly rate (mL/hr)?
50
The doctor writes an order to infuse a solution. The order reads: "Infuse 300 mL over 6 hours". What is the hourly rate (mL/hr)?
0910
The doctor writes an order to infuse a solution. The order reads: "Infuse 500 mL bag at 20 gtt/min". The drip factor is 10 gtt/mL. You start the IV infusion at 0500. At what time will the infusion be complete?
18
The doctor writes an order to infuse a solution. The order reads: "Infuse 650 mL over 6 hours. The drip factor is 10 gtt/mL. How many drops per minute (gtts/min) will be administered?
237
The patient is ordered Glucerna 1.2 cal. You're supplied with a can of Glucerna that contains 237 mL of feeding formula. The doctor orders the tube feeding to be administered at a 1/2 strength with a rate of 65 mL/hr. How much water will you add to dilute the tube feeding formula as prescribed?
2
The physician orders alprazolam (Xanax) 0.5 mg PO. You have on hand Xanax 0.25 mg tablets. How many tablet(s) will you give? Fill in the blanks. _____ tablet(s)
7
The physician orders an IV with heparin at 700 units/hour. You have a bag with 100 units/mL of solution. How many milliliters per hour will you set on the IV infusion controller? Fill in the blanks. _____ mL/hr
1.5
The physician writes a "now" order for codeine 45 mg IM for a patient with a vertebral compression fracture. You have on hand codeine 60 mg/2 mL. How many milliliters should you give? Fill in the blanks and record your answer using one decimal place. _____ mL
(Desired Dose / Available Dose) x Volume Available
What is the formula for dosage calculation?
(Flow Rate (mL/hr) / 60 (min/hr)) x gtt Factor (gtt/mL)
What is the formula for drip rate?
Total Volume (mL) / Number of Hours
What is the formula for flow rate?
2
You are caring for a patient at home who must take magnesium hydroxide/aluminum hydroxide (Maalox) 30 mL PO. How will you instruct the patient to measure the dose using ordinary household measuring devices? Fill in the blanks. Record your answer to the nearest whole number. _____ tbsp
25
You have an IVPB of ranitidine (Zantac) 50 mg in 50 mL D5W to run over 30 minutes. The tubing has a drip factor of 15. How many drops per minute will you set on the IV infusion controller? Fill in the blanks and round your final answer to a whole number. _____ gtts/minute
0.26
You have on hand hydromorphone (Dilaudid) 4 mg/mL. You need to administer 0.015 mg/kg to a patient who weighs 150 pounds. How many milliliters should you administer? Fill in the blanks. Record your answer using two decimal places. _____ mL
0.5
You need to administer 250 mg of erythromycin (Erythrocin) PO. You have on hand 0.5 g tablets. How many tablet(s) will you give? Fill in the blanks. _____ tablet(s)
75
You need to administer furosemide (Lasix) 2 mg/minute via continuous IV infusion on a controller. Pharmacy has sent a bag of Lasix 400 mg diluted in D5W 250 mL. How many milliliters per hour will you set on the controller? Fill in the blanks. _____ mL/hr
21
Your patient needs 2,000 mL of D5W IV over 24 hours, to be delivered with tubing set with a drop factor of 15. How many drops per minute will you set for an infusion rate? Fill in the blank and round to the nearest whole number for your final answer. _____ gtts/minute
500
Your patient needs 2,000 mL of saline IV over 4 hours for severely deficient fluid volume. How many milliliters per hour will you set on a controller? Fill in the blanks. _____ mL/hr
