Ch 4: Conversions and Calculations Used by Pharmacy Technicians
Roman numeral XXXIII = Arabic number [x1]
33
How much medication would be needed for the following prescription? Prednsione tablets 10 mg One qid for 6 days; one tid for 3 days; one bid for 1 day; then stop
35
2 pints = [x1] cups
4
Using the DEA number formula, what should be the last digit of this DEA number? AB461853__
4
The approximate size of a container for dispensing 120 mL of a liquid medication would be
4 oz
The ability to manipulate conversions is a required competency of pharmacy technicians.
True
How many grams of yellow mercuric oxide must be added to 30 g of 1% yellow mercuric oxide ointment to prepare a 5% ointment? (use alligation method)
not 71.3 g
The weight of 1 grain is
not All of the above
The cost of 100 g of hydrocortisone powder is $36.00. What would be the cost of 12 g?
$4.32
A pharmacy wants to increase to price of a product by 35%. How much would an item cost with this markup if its original cost was $6.75?
$9.11
Convert 12:14 AM to military time
0014
5 cc = [x1] tsp
1
You receive an order for Kaopectate 15 mL bid prn. One dose equals how many tablespoonfuls?
1
78 mg = [x1] gr (1 grain = 64.79891 milligrams)
1.2
Convert 1200mg. to grams
1.2 g
How many grams of potassium permanganate are required to prepare 2 quarts of a 1:750 solution of potassium permanganate?
1.28 g
If the dose of a drug is 35 mg/kg/day in six divided doses, how much would be given in each dose to a 38-pound child?
101 mg
A pharmacist dispenses 300 mL of amoxicillin 150 mg/5 mL suspension. The sig is 250 mg PO tid ug. How many days will the prescription last?
12 days
A patient who weighs 633 kg weighs how many pounds?
1392.6
Roman numeral XV = Arabic number [x1]
15
A dose is written for 10mg/kg every 12 hours for 1 day. The adult taking this medication weighs 165 pounds. how much drug will be needed for this order?
1500 mg
Roman numeral MDX = Arabic number [x1]
1510
30 mL = [x1] tbsp
2
2500 mL = [x1] L
2.5
A physician orders ampicillin 0.5 g PO q6h. The medication available is ampicillin 125 mg/5 mL. What is the quantity of medication to be administered? (hint: quantity per administration)
20 mL
Roman numeral CC = Arabic number [x1]
200
8 ounces = [x1] ml
240
55 lb = [x1] kg
25
125 kg = [x1] lb
275
90 mL = [x1] oz
3
The physician orders atropine 1/150 gr PO bid. The atropine available is 0.4 mg per tablet. The nurse will administer how many tablets per dose? (use 60 mg/gr)
3. 1
3 kg = [x1] g
3000
A prescription is written for Pen VK 500 mg tablets PO qid for 10 days. The patient, who has throat cancer and cannot swallow, requests a liquid form. What volume of a 250 mg/5 mL suspension should be dispensed?
400 mL
How many days will the following prescription last? Zoloft 100 mg #90 Sig: 1 PO bid
45 days
The Roman numeral VLIII is equivalent to
48
A 125-pound patient weighs how many kilograms?
56.82
The Roman numeral LVIII is equivalent to
58
An IV solution containing 20,000 units of heparin in 500 mL of 0.45% NaCl solution is to be infused to provide 1000 units of heparin per hour. How many drops per minute should be infused to deliver the desired dose if the IV set calibrates at 15 gtt/mL?
6 gtt/min
How many liters of a 0.9% normal saline solution can be made from 60 g of NaCl?
6.67 L
An IV solution is ordered to run at 3.5 gtts/min. It contains 875 mg in a total of 250 mL. How many milligrams will the patient receive per hour if the set is calibrated to deliver 12 gtts/mL?
61 mg/hr
3600 mL = [x1] pts
7.5
Mylanta and Donnatal are to be combined in a 2:1 ratio. How many milliliters of each are required to make 120 mL of the suspension?
80 mL/40 mL
Roman numeral IX = Arabic number [x1]
9
Roman numeral XCIV = Arabic number [x1]
94
Avoirdupois system
A system of measurement used to determine weight
Metric system
A system of measurement based on multiples of 10
Household
A system of measurement commonly used for weight, volume, and length in the United States
Apothecary system
A system of measurement used in pharmacy
Arabic number 250 = Roman numeral [x1]
CCL
Arabic number 125 = Roman numeral [x1]
CXXV
It is not important for the technician to double check the calculations because the pharmacist will check them.
False
Not all transcriptions and conversions need to be checked by a pharmacist.
False
One milliliter (mL) is equivalent to one-half cubic centimeter (cc)
False
One of the most common errors made in pharmacy is placing a zero in front of a decimal.
False
The metric system is used throughout pharmacy because it is the easiest to remember.
False
When conversion is done using the household system, the decimal must be moved either to the right or to the left.
False
There are 1000 milligrams in 1
Gram
Arabic number 60 = Roman numeral [x1]
LX
Volume refers to
Liquids
A dosage of 0.5 g/5mL is prescribed. You have in stock 150 mg/mL. How many milliliters would be given using the dosage strength on hand?
Not 1.5 mL
If 5 mL of diluent is added to a vial containing 2 g of a drug for injection, resulting in a final volume of 5.8 ml, what is the concentration in milligrams per milliliters of the drug in the reconstituted solution?
Not 444 mg/mL
The doctor's order is for Timoptic ii gtts ou bid. How many drops will the patient get in 12 days?
Not 48 drops. Maybe 96?
The technician should show the parent of a pediatric patient how to measure the correct dosage.
Not True
Which prescription instructions would require 21 tablets to be dispensed?
Three tabs bid for 2 d; two tabs qd for 3 d; one tab qd for 3 d
About 90% of all pharmacy calculations are ratio-porportion equations.
True
All measurements used in pharmacy must be converted to the household system for the patient.
True
Most IV piggyback solutions are given over 30 to 60 minutes.
True
Roman numerals and Arabic numbers are both used in pharmacies.
True
Arabic number 39 = Roman numeral [x1]
XXXIX
