Dosage Calculations Practice
A client is ordered 30 milligrams of Codeine phosphate. 60 milligram tablets are available. How many tablets will you give?
0.5
Ordered 1000 mL D5W IV to infuse in 10 hours by infusion pump
100mL/hr
A client is ordered 100 milligrams of Pehthidine HCL. 50 milligram tablets are available. How many tablets will you give?
2
A client is ordered 200 milligrams of Augmentin 600 intravenously. 600 milligrams in 6 milliliters of liquid for IV Injection is available. How many millilitres will you administer?
2
Convert 0.008781 milliliters to microliters
8.781
RL or LR?
Lactated Ringer's
what is this W and S?
W-water, S-saline
Given the weight of a patient and a dosage specified in terms of weight, calculate the necessary dosage
Weight in Kg * Dosage Per Kg = Y (Required Dosage)
A doctor orders 200 mg of Rocephin to be taken by a 15.4 lb infant every 8 hours. The medication label shows that 75-150 mg/kg per day is the appropriate dosage range. Is this doctor's order within the desired range?
Weight in Kg * Dosage Per Kg = Y (Required Dosage) Convert 15.4 lb to kg. lb → kg ( ÷ by 2.2 ) 15.4 lb ÷ 2.2 = 7 kg 7 kg * 75 mg/kg = 525 mg (Minimum Desired Dosage) 7 kg * 150 mg/kg = 1,050 mg (Maximum Desired Dosage) 24 hours in one day and the medication is ordered every 8 hours. 24 hrs / 8 hrs = 3 times per day doctor ordered medication 200 * 3 = 600 mg ordered per day600 mg is within the desired range of 525-1,050 mg Yes doctor has ordered a dosage within the desired range
Given a volume of IV fluid and a dosage expressed in percent, what is the mass of a particular dosage?
concentration % /100 *volume (ml)=dosage (g)
what is this "gtts"?
drops
Convert 14.805 micrograms to milligrams
0.014805
Convert 91.765 grams to milligrams
91765
Convert 93074 milligrams to grams
93.074
Convert 16.961 micrograms to milligrams
0.016961
Convert 46704 micrometers to meters
0.046704
Convert 70.906 microliters to milliliters
0.070906
Convert 91.103 microliters to milliliters
0.091103
Convert 97.196 micrograms to milligrams
0.097196
A client is ordered 50 milligrams of Amoxicillin trihydrate orally. 125 milligrams in 5 milliliters of Syrup is available. How many milliliters will you administer?
50/125*5/1=2
Convert 0.056244 milligrams to micrograms
56.244
what is this " Flow Rate"?
Measure of the flow of liquid from an IV. Usually measured in gtts/minute (how many drops are released every minute) or in mL/hour (how many mL flow through each hour). gtts/minute is used for manually regulating an IV while mL/hour is used when utilizing an electronic IV regulator.
Given a certain amount of liquid, a time period, and a drop factor (gtts/mL), what is the necessary IV flow rate in gtts/min?
Measurement used when IV is regulated manually. Because it is not possible to give a patient a fraction of a drop, it is typical to round answers for these problems up or down to the nearest whole number- volume/time*drop factor=flow rate
Given a certain amount of liquid and a time period, what is the necessary IV flow rate in mL/hr?
Measurement used when IV regulated electronically by infusion pump-volume (ml)/time(hr)=flow rate mL/hr
what is this NS?
Normal Saline (0.9% NaCl)
what is this " Drop Factor"?
Number of drops per volume of IV fluid. Varies depending on the tubing used. Usually measured in gtts/mL.
A client is ordered 5 milligrams of Flupenthixol decanoate by intramuscular injection. 40 milligrams in 2 milliliters of liquid for IM Injection is available. How many milliliters will you administer?
0.25
A client is ordered 62.5 micrograms of Benztropine Mesylate. 0.25 mg tablets are available. How many tablets will you give?
0.25
A client is ordered 20 milligrams of Haloperidol decanoate by intramuscular injection. 50 milligrams in 1 milliliter of liquid for IM Injection is available. How many milliliters will you administer?
0.4
A client is ordered 1 milligram of Diazepam. 2 milligram tablets are available. How many tablets will you give?
0.5
A client is ordered 2.5 milligrams of Haloperidol. 5 milligram tablets are available. How many tablets will you give?
0.5
A client is ordered 30 milligrams of Diltiazem hydrochloride. 60 milligram tablets are available. How many tablets will you give?
0.5
Calculate the amount of sodium chloride in 2000 mL NS. Recall NS is 0.9% NaCl (sodium chloride)
0.9%/100*2000=18 g
A client is ordered 10 milligrams of Thioridazine orally. 50 milligrams in 5 milliliters of suspension is available. How many milliliters will you administer?
1
A client is ordered 1.25 milligrams of Clonazepam. 0.5 milligram tablets are available. How many tablets will you give?
2.5
A client is ordered 13 milligrams of Morphine sulphate by intramuscular injection. 5 milligrams in 1 milliliter of liquid for IM Injection is available. How many milliliters will you administer?
2.6
One litre of Dextrose 5% in water is charted over 8 hours. The drop factor is 10. Calculate the number of drops per minute.
21 drops in min
Ordered: 1 litre of Dextrose 5% in water over 8 hours using a giving set which delivers 10 drops/ml. Calculate the rate in drops/minute.
21 drops in min
You are required to administer 1 litre of Normal Saline over 7 hours. The drop factor is 10. How many drops per minute are required to start the flow off at the correct rate?
24 drops in min
You are required to administer 500 mls of Normal Saline over 3.5 hours. The drop factor is 10. How many drops per minute are required to start the flow off at the correct rate?
24 drops in min
Calculate the drip rate for 500 mls of Normal Saline to be given over 4.5 hours via a giving set which delivers 15 drops/ml.
28 drops in min
A client is ordered 30 milligrams of Frusemide intravenously. 10 milligrams in 1 milliliter of liquid for IV Injection is available. How many milliliters will you administer?
3
A client is ordered 300 milligrams of Thioridazine. 100 milligram tablets are available. How many tablets will you give?
3
A client is ordered 60 milligrams of Nefopam hydrochloride by intramuscular injection. 20 milligrams in 1 milliliter of liquid for IM Injection is available. How many milliliters will you administer?
3
A client is ordered 7.5 milligrams of Bendrofluazide. 2.5 milligram tablets are available.How many tablets will you give?
3
A client is ordered 75 milligrams of Aminophylline intravenously. 250 milligrams in 10 milliliters of liquid for IV Injection is available. How many milliliters will you administer?
3
Calculate the drip rate for 500 mls of Dextrose 5% in water to be given over 4 hours via a giving set which delivers 15 drops/ml.
31
Calculate the IV flow rate for 200 mL of 0.9% NaCl IV over 120 minutes. Infusion set has drop factor of 20 gtts/mL
33 gtts/min
One and a half litres of IV Fluids is prescribed over 8 hours. The drop factor is 15. How many drops per minute are required to start the flow off at the correct rate?
47
One litre of Dextrose 5% in water is charted over 3 hours. The drop factor is 10. The IV has been running for 1 hour and 15 minutes. 500 mls remain. How many drops per minute are needed so that the IV finishes in the required time?
48
Convert 64343 milliliters to liters.
64.343
Three litres of Hartmans (Lactated Ringer's) is charted over 12 hours. The drop factor is 15. The IV has been running for 9 hours. 800 mls remain. How many drops per minute are needed so that the IV finishes in the required time?
67
Calculate the drip rate for 2 litres of IV Fluids to be given over 5 hours via a giving set which delivers 10 drops/ml.
67 drops in min
Convert 0.070223 liters to microliters
70223
Convert 0.073969 liters to microliters
73969
A client is ordered 75 micrograms of Fenatyl citrate intravenously. 0.1 milligrams in 1 milliliter of liquid for IV Injection is available. How many milliliters will you administer?
75*0.001=0.075 0.075/0.1=0.75
Convert 0.089292 meters to micrometers
89292
what is this "D'?
Dextrose
1) 0-10 kg? 2)10-20 kg? 3)20-70 kg? 4) over 70 kg?
1)100 ml per kg 2)1,000 mL + 50 mL per each kg above 10 kg 3)1,500 mL + 20 mL per each kg above 20 kg 4)2,500 mL (adult requirement)
A client is ordered 50 milligrams of Sodium Valproate orally. 200 milligrams in 5 milliliters of Syrup is available. How many milliliters will you administer?
1.25
A client is ordered 300 milligrams of Carbamazepine. 200 milligram tablets are available. How many tablets will you give?
1.5
A client is ordered 37.5 milligrams of Clomipramine. 25 milligram tablets are available. How many tablets will you give?
1.5
A client is ordered 37.5 milligrams of Nortriptyline 25 milligram tablets are available. How many tablets will you give?
1.5
A client is ordered 75 milligrams of Pethidine HCL by subcutaneous injection. 50 milligrams in 1 milliliter of liquid for SC Injection is available. How many milliliters will you administer?
1.5
One and a half litres of Normal Saline is required to be given over 4 hours. Using a giving set which delivers 10 drops/ml how many drops per minute will need to be given?
1.5 liters(1500 ml)*10 drops( in ml)/240 (4 hours) min=63 drops in min
An infant weighs 30.8 lb. What is the required IV flow rate in mL/hr to maintain proper fluid levels?
1.Convert 30.8 lb to kg. lb → kg ( ÷ by 2.2 ) 30.8 lb ÷ 2.2 = 14 kg 2. 14 kg - 1200 ml in one day 3.1200/24 hr=.......50 ml/hr
One hundred millilitres of IV Fluids is charted over 2.5 hours. The drop factor is 15. Calculate the number of drops per minute.
10
Calculate the drip rate for 100 mls of IV Fluids to be given over a half hour via a giving set which delivers 10 drops/ml
100 mls*10 drops(ml)/30 min=33 drops in a min
Phenytoin (Dilantin), 0.1 g PO, is ordered to be given through a nasogastric tube. Phenytoin is available as 30 mg / 5 mL. How much would the nurse administer?
100/30*5=16.7
One litre of Normal Saline is charted over 9 hours. The drop factor is 15. Calculate the number of drops per minute.
1000 mls*15 drops in ml/540 (9 hours) min=28 drops in min
Calculate the IV flow rate for 1200 mL of NS to be infused in 6 hours. The infusion set is calibrated for a drop factor of 15 gtts/mL
1200/360*15=50 gtts/min
One litre of IV Fluids is charted over 11 hours. The drop factor is 10. The IV has been running for 9 hours and 45 minutes. 100 mls remain. How many drops per minute are needed so that the IV finishes in the required time?
13
A client is ordered 200 milligrams of Sodium Valproate. 100 milligram tablets are available. How many tablets will you give?
2
A client is ordered 50 milligrams of Aminophylline intravenously. 250 milligrams in 10 milliliters of liquid for IV Injection is available. How many milliliters will you administer?
2
A client is ordered 50 milligrams of Amitriptyline. 25 milligram tablets are available. How many tablets will you give?
2
A client is ordered 22 milligrams of Gentamicin sulphate by intramuscular injection. 20 milligrams in 2 milliliters of liquid for IM Injection is available. How many milliliters will you administer?
2.2
A client is ordered 25 milligrams of Methyldopa intravenously. 50 milligrams in 5 millilitres of liquid for IV Injection is available. How many millilitres will you administer?
2.5
A client is ordered 5 milligrams of Haloperidol orally. 2 milligrams in 1 milliliter of Syrup is available. How many milliliters will you administer?
2.5
You are required to administer 100 mls of IV Fluids over 1 hour. The drop factor is 15. How many drops per minute are required to start the flow off at the correct rate?
25 drops in min
Infuse 250 mL over the next 120 minutes by infusion pump
250/2 (120 minutes)=125 mL/hr
Convert 0.027342 milliliters to microliters
27.342
A client is ordered 35 milligrams of Codeine phosphate by subcutaneous injection. 50 milligrams in 1 milliliter of liquid for SC Injection is available. How many milliliters will you administer?
35/50*1/1=35/50=0.7
You are required to administer 1 litre of Normal Saline over 7 hours. The drop factor is 15. How many drops per minute are required to start the flow off at the correct rate?
36
A client is ordered 37.5 milligrams of Dothiepin. 75 milligram tablets are available. How many tablets will you give?
37.5/75=0.5
A client is ordered 100 milligrams of Thioridazine. 25 milligram tablets are available. How many tablets will you give?
4
A client is ordered 200 milligrams of Amoxicillin trihydrate orally. 250 milligrams in 5 milliliters of Syrup is available. How many milliliters will you administer?
4
A client is ordered 40 milligrams of Imipramine. 10 milligram tablets are available. How many tablets will you give?
4
A client is ordered 60 milligrams of Phenelzine. 15 milligram tablets are available. How many tablets will you give?
4
An infant weighs 4 kg. What is the required amount of fluid per day in mL?
4*100=400 ml
You are required to administer 3 litres of IV Fluids over 12 hours. The drop factor is 10. How many drops per minute are required to start the flow off at the correct rate?
42 drops in min
Convert 45232 milligrams to grams
45.232
A client is ordered 2.5 grams of Neomycin sulphate. 500 milligram tablets are available. How many tablets will you give?
5
Calculate the amount of dextrose in 1000 mL D5W
5/100*1000=50g
Calculate the drip rate for 100 mls of IV Fluids to be given over 2 hours via a giving set which delivers 60 drops/ml.
50
A client is ordered 0.5 milligrams of Digoxin. 250 microgram tablets are available. How many tablets will you give?
500=0.5 mg/250 mcg=2
Three litres of Normal Saline is charted over 12 hours. The drop factor is 15. The IV has been running for 9 hours and 45 minutes. 500 mls remain. How many drops per minute are needed so that the IV finishes in the required time?
56
Convert 0.056915 meters to micrometers.
56915
Convert 0.090113 milliliters to microliters
90.113
Convert 97599 milligrams to grams
97.599
Convert 9.707 liters to milliliters
9707
