Conversion problems
A patient with an eating disorder weighs 95½ lbs. What is the patient’s weight in kg? Round to the nearest tenth
43.4 kg
Order: magnesium sulfate 20 g IV in RL 1,000 mL, infused at 2 g/h. What is the flow rate in mL/h?
100 ml/h
The prescriber ordered Mannitol 12.5 g IVP stat. The label on the 50 mL vial reads 25%. How many milliliters of this osmotic diuretic will you prepare?
50 ml
A patient is receiving Zantac (ranitidine HCl) 150 mg PO b.i.d. The label reads 150 mg tablets. How many tablets will the patient receive in 24 hours?
2 tablets
Order: Colace (docusate sodium) syrup 100 mg via PEG t.i.d. The label reads 50 mg/15 mL. How many mL will you give?
30 ml
A patient has an IV infusion at 25 gtt/min. How many mL/h is the patient receiving? The drop factor is 15 gtt/mL
100 ml/h
A physician ordered 187.5 mg of Diamox for a patient q12h. Diamox is available in 125 mg scored tablets. How many tablets are needed for a week's supply?
21 tablets
A vial contains 1 g of a medication. 20 mL of a diluent was added. How many drops should be given to provide 25 mg of the drug to a pediatric patient?
0.5 ml
Order: Humulin R insulin 100 units in 100 mL NS, infuse at 0.1 unit/kg/h The patient weighs 68 kg. How many units per hour is the patient receiving
6.8 units/h
The prescriber ordered an insulin drip of Humulin R Regular insulin 300 units IV in RL 150 mL, infuse at 10 mL/h. How many units/h of insulin is the patient receiving?
20 units/h
Rebif (interferon beta) 44 mcg subcutaneously three times a week is prescribed for a patient with multiple sclerosis. How many milligrams will the patient receive in one week?
0.132 mg
A physician orders 1.5 mg/lb for a patient who weighs 90.9 kg. The medication is supplied in a vial containing 1 g in 10 mL. How many mL is the patient to receive? (Round to the nearest whole number.)
3 ml
Order: Acular (ketorolac tromethamine) 1 drop 0.5% ophthalmic solution to right eye Q.I.D. for 2 weeks. The vial contains 10 mL. How many milligrams of Acular are in the vial?
50 mg
Order: Indocin SR (indomethacin) 150 mg PO t.i.d. for 7 days The label reads Indocin SR 75 mg capsules. (a) How many capsules will you give the patient for each dose? (b) Calculate the entire 7 day dosage in grams.
2 capsules
3.15 g
A dosage of 300 mcg has been ordered. The solution strength is 0.4 mg/mL. Calculate in milliliters the volume of medication needed.
0.75 ml
Order: Lanoxicaps 0.1 mg PO b.i.d. The label on the bottle reads 50 mcg/capsule. How many capsules will you give the patient?
2 capsules
A patient with aspiration pneumonia has an order for aminophylline IVPB 250 mg in 250 mL D5W to Infuse at 0.5 mg/kg/h. The patient weighs 80 kg. What is the flow rate in mL/h?
40 ml/h
How many mL of an 8.5% stock solution of sodium chloride is needed to prepare 0.3 L of a 5% solution?
176.5 ml
Order: nitroprusside sodium 50 mg in 250 mL D5W infuse at 1 mL/h The recommended dosage range is 0.1 to 5 mcg/kg/min. The patient weighs 154 pounds. Is this a safe dose?
No
The prescriber ordered Cefobid (cefoperazone) 1g IVPB q12h to infuse in 30 minutes. The label on the 1 gram premixed IV bag reads cefoperazone 50 mL, 50 mg/mL. (a) Calculate the flow rate in milliliters per hour. (b) How many milligrams will the patient receive?
100 ml/h
1000 mg
The prescriber ordered Zithromax (azithromycin) oral suspension 10 mg/kg PO on day 1, then 5 mg/kg for 4 more days. The strength on the vial is 176 mg/5 mL. How many milliliters will a child who weighs 54 pounds receive on day three?
3.5 ml
The recommended dose of Cleocin (clindamycin) pediatric oral solution is 8 to 25 mg/kg/day in three to four equally divided doses. A child weighs 60 pounds. (a) Calculate the minimum safe daily dose in mg/d. (b) Calculate the maximum safe daily dose in mg/d.
218 mg/d
681 mg/d
A patient has an IV of 250 mL with 1 g of 1% lidocaine infusing via pump at a rate of 10 mL/h. (a) What is the concentration of lidocaine measured in mg/mL? (b) How many milligrams of lidocaine is the patient receiving per hour? (c) How many milliliters per minute of lidocaine is the patient receiving?
4 mg/ml
40 mg/h
0.17 mg/in
The prescriber ordered diazepam 10 mg IVP stat, give slowly 1 minute per 5 mg. The strength on the label is 5 mg/mL. (a) How many milliliters are needed? (b) How many minutes will it take to administer the dose? (c) How many milliliters will be administered every 30 seconds?
2 ml
2 min
0.5 ml/sec
The prescriber ordered Elspar (asparaginase) 6,000 International Units/m2 IM three times per week. The directions on the 10,000 unit vial state to reconstitute the powder with 2 mL for intramuscular injection, or 5 mL for intravenous administration. How many milliliters of this antineoplastic drug will you administer for a patient who weighs 150 pounds and is 63 inches tall?
2.1 ml