- A patient is receiving 160 mg of methylprednisolone IM every 12 hours. You have on hand two vials that each contains 125 mg/2 mL. How much will you draw into a syringe?
- You have available lorazepam (Ativan) 0.5 mg tablets, and you need to administer 1 mg PO. How many tablets will you administer?
- A patient is instructed to take acetaminophen (Tylenol) liquid (elixir) 650 mg qid. The elixir is 160 mg/5 mL. How many milliliter per dose should the patient take?
- 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?
- A patient with heart failure has a daily order for digoxin 0.25 mg PO. Digoxin 0.125 mg tablets are available. How many tablets should you give?
- A patient on hemodialysis must maintain careful intake and output. For breakfast he had 1 measured cup of coffee and 3 oz of milk on his cereal. For lunch he drank 6 oz of lemonade and ate 1 cup of soup. For supper he drank 1 measured cup of coffee. He took his morning and evening pills with 4 oz of water each time. Has he stayed within his 1000 mL fluid restriction?
- 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?
- You have an order to administer 40 mg of methadone SC for opioid detoxification. You have on hand 30 mg/mL. How much should you draw into the syringe?
- A patient is placed on methadone maintenance therapy of 15 mg/day PO. It is supplied as 10 mg in 5 mL oral solution. How many milliliters should you instruct the patient to take?
- A homebound patient must take 400,000 units of nystatin PO every 4 hours, to swish in the mouth and then swallow. It is available as 100,000 units/5 mL. The patient has only household measuring spoons. How should the patient be instructed to take the dose?

###### Answers

- (160
~~mg~~x 2 mL) / 125~~mg~~=**2.6 mL** - (1
~~mg~~x 1 tablet) / 0.5~~mg~~=**2 tablets** - (650
~~mg~~x 5 mL) / 160~~mg~~=**20 mL** - (45
~~mg~~x 2 mL) / 60~~mg~~=**1.5 mL** - (0.25
~~mg~~x 1 tablet) / 0.125~~mg~~**= 2 tablets** - Convert first to mL :
- (1
~~cup~~x 240 mL) / 1~~cup~~**=***240 mL***,** - (3
~~oz~~x 30 mL) / 1~~oz~~=*90 mL*, - (6
~~oz~~x 30 mL)/ 1~~oz~~=*180 mL*, - (4
~~oz~~x 30 mL)/ 1~~oz~~=*120 mL* - 240 + 90 + 180 + 240 + 240 + 120 + 120
**= 1230 mL**

No, he has exceeded his fluid restriction limit by 230 mL.

- (1
- (0.015
~~mg~~x 1~~kg~~x 150~~pounds~~x 1 mL) / ( 1~~kg~~x 2.2~~pounds~~x 4~~mg~~)**= 0.26 mL** - (40 mg x 1
~~mL~~) / 30~~mL~~**=1.3 mL** - (15
~~mg~~x 5 mL) / 10~~mg~~**= 7.5 mL** - (400,000
~~units~~x 5~~mL~~x 1 teaspoon) / (100,000~~unit~~s x 5~~mL~~)**= 4 teaspoons**