pharma - dosage calculations (easy)
Your patient is to receive 12.5 mg PO QID. You have 25 mg scored tablets available. How many tablets will the patient receive for each dose?
12.5 mg * (1 tab / 25 mg) = 0.5 tab
You have an order for 0.25 mg of levothyroxine which is available in 125 mcg scored tablets. How many tablets will you administer?
0.25 mg (1 tab / 125 mcg) * (1000 mcg / mg) = 2 tabs
The order is for 1 g PO and you have 250 mg capsules available. How many capsules will you administer?
1 g * (1 cap / 250 mg) (1000 mg / g) = 4 caps
Your patient has an order for 15 mg PO of a drug to be administer at 2100. You have available 7.5 mg capsules. How many capsules will you administer?
15 mg * (1 cap / 7.5 mg) = 2 caps
Your pediatric patient will be going home with a 150 mL bottle of amoxicillin 250 mg/5 mL with instructions for 5 mL to be given PO Q8H. How many days will the bottle last?
150 mL * (1 dose / 5 mL) * (1 day / 3 doses) = 10 days
The physician has ordered 35 mg IV of a drug which is available in 5 mL vials containing 20 mg/mL. How many mL will you administer?
35 mg * (1 mL / 20 mg) = 1.8 mL
You have an order for 500 mcg IV of drug xyz which is available in 5 mL vials labeled 0.25 mg/mL. How many mL will you administer?
500 mcg * (1 mL / 0.25 mg) * (1 mg / 1000 mcg) = 2 mL
The order is 500 mcg IV. On hand you have a 2 mL vial containing 1 mg/mL. How many mL will you administer?
500 mcg * (1 mL / mg) * (1 mg / 1000 mcg) = 0.5 mL
The PA has ordered 900 mcg IM of a drug which is available in 1 mL vials containing 2 mg/mL. How many mL will you administer?
900 mcg * (1 mL / 2 mg) * (1 mg / 1000 mcg) = 0.45 mL
The order is for 0.5 g PO BID. You have 250 mg capsules available. How many capsules will be administered per day?
(0.5 g / dose) * (2 doses / day) * (1 cap / 250 mg) * (1000 mg / g) = 4 caps/day
Your patient has an order for 1.5 mg IV of a drug which is available in 5 mL vials containing 500 mcg/mL. How many mL will you administer?
1.5 mg * (1 mL / 500 mcg) * (1000 mcg / 1 mg) = 3 mL
The healthcare provider has ordered 4.5 mg IV TID for your patient. The drug is available in 10 mL vials containing 10 mg/mL. How many mL will you draw up to administer one dose?
4.5 mg * (1 ml / 10 mg) = 0.45 mL
You have an order to administer a 400 mg dose IM of a drug which is available in 10 mL vials containing 1 g. How many mL will you administer?
400 mg * (10 mL / g) * (1 g / 1000 mg) = 4 mL
You have an order for 1 g/day PO divided into 2 doses. You have 250 mg tablets available. How many tablets will you administer per dose?
(1 g / day) * (1 day / 2 doses) * (1 tab / 250 mg) * (1000 mg / g) = 2 tabs/dose
The NP has ordered 1 g/day IV divided into 4 doses of a drug which is available in 20 mL vials containing 100 mg/mL. How many mL/dose will you administer?
(1 g / day) * (1 day / 4 doses) * (1 mL / 100 mg) * (1000 mg / g) = 2.5 mL/dose
The physician has ordered 100 mg/day IM divided into 2 doses. you have a 1 mL vial labeled 50 mg/mL. How many mL will you administer per dose?
(100 mg / day) * (1 day / 2 doses) * (1 mL / 50 mg) = 1 mL/dose
The healthcare provider has ordered 100 mg/day IV divided into 4 doses. You have a 5 mL vial labeled 50 mg/mL. How many mL will you administer per dose?
(100 mg / day) * (1 day / 4 doses) * (1 mL / 50 mg) = 0.5 mL/dose
Your 45 YO patient who weighs 178 lb has been ordered drug abc 100 mg/day IV divided into 4 doses. Drug abc is available in 10 mL vials containing 50 mg/mL. How many mL will you administer per dose?
(100 mg / day) * (1 day / 4 doses) * (1 mL / 50 mg) = 0.5 mL/dose
The NP has ordered 100 mg IM BID of a drug which is available in 5 mL vials labelled 50 mg/mL. How many mL will you administer per dose?
(100 mg / dose) * (1 mL / 50 mg) = 2 mL/dose
The MD has ordered 100 mg PO TID of a drug which is available in 20 mL vials containing 50 mg/mL. How many mL will be administered each day?
(100 mg / dose) * (3 dose / day) * (1 mL / 50 mg) = 6 mL/day
The physician has ordered 1000 mg/day PO divided into 2 doses of a drug which is available in 250 mg capsules. How many capsules will you administer?
(1000 mg / day) * (1 day / 2 doses) * (1 cap / 250 mg) = 2 caps/dose
Your patient is to receive 120 mL of a commercial formula via G-Tube QID. The formula is available in 240 mL containers. How many containers will be administered each day?
(120 mL / dose) * (4 doses / day) * (1 container / 240 mL) = 2 containers/day
Your 67 YO patient has an order for 200 mg IM Q4H. The drug is available as 100 mg/mL. How many mL will you administer per dose?
(200 mg / dose) * (1 mL / 100 mg) = 2 mL/dose
The provider has ordered 50 mcg/day PO divided into 2 doses. You have available 0.025 mg tablets. How many tablets will you administer per dose?
(50 mcg / day) * (1 day / 2 dose) * (1 tab / 0.025 mg) * (1 mg / 1000 mcg) = 1 tab/dose
The physician has ordered drug xyz 50 mg/day IV divided into 2 doses. The pharmacy sends a 5 mL vial which contains drug xyz in a concentration of 100 mg/mL. How many mL will you administer for each dose?
(50 mg / day) * (1 day / 2 doses) * (1 mL / 100 mg) = 0.25 mL/dose
Your patient has been ordered 500 mg IV Q6H of a drug which is available in 20 mL vials containing 25 mg/mL. How many mL will be administered in 24 hours?
(500 mg / dose) * (4 doses / day) * (1 mL / 25 mg) = 80 mL/day
Your patient has an order for 600 mg/day IV divided into 4 doses. You have available a 10 mL vial containing 500 mg of the drug. How many mL will you administer per dose?
(600 mg / day) * (1 day / 4 doses) * (10 mL / 500 mg) = 3 mL/dose
You have an order for 0.125 mg PO of a drug which is available in 125 mcg tablets. How many tablets do you administer?
0.125 mg * (1 tab / 125 mcg) * (1000 mcg / mg) = 1 tab
The physician has ordered 0.8 mg IV Q2H for 2 doses. You have available 5 mL vials containing 0.4 mg/mL. How many mL will you administer for one dose?
0.8 mg * (1 mL / 0.4 mg) = 2 mL
The NP has ordered 3 mg IV for your 189 lb patient. The drug is available in 10 mL vials containing 500 mcg/mL. How many mL will you administer?
3 mg * (1 mL / 500 mcg) * (1000 mcg / mg) = 6 mL
