Transcript Physician`s Signature Bertha Bolls, MD

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Pharmacy Technician
Math Module
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Calculate the Dosage
Hi,
my name is
Ashia; I am a
pharmacy
technician.
Ashia is a pharmacy
technician at a local
hospital. She works part
time to support her family
and provide health
insurance coverage for
her family. She prefers to
work evenings when her
husband can assist her by
watching their two
children.
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Focus
The focus of this math strand is for you to be able to figure
out the amount of medication, in the proper form, to fill a
prescription ordered by a doctor.
In this math strand, you will be learning and reviewing the
following math skills:
1) Applying medical abbreviations to math solutions
2) Using a formula to calculate dosage
3) Adding
4) Multiplying
5) Dividing
6) Sorting necessary and unnecessary information to solve
a word problem
7) Noting key math words or phrases to solve math
problems such as simplify an expression and per as in
5 milligrams per milliliter
8) Reading drug labels
9) Applying the standard formulas used in health care
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Calculating Dosage
On the evening shift,Ashiasupports the nursing staff at the
hospital by calculating medical dosages and providing the
medicine in measured doses to the nursing staff. To do this,
Ashia relies on some basic knowledge about medications.
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Calculating Dosage
The dose is located directly after the name of the medication.
This is the individual dose that the doctor is ordering. The total
medication order covers a certain period of time such as: take
for 7 days, take for 10 days, or take daily. Look at the doctor’s
prescriptions and consider the following questions:
Phone 360-293-9999
DEA# 23476512
Angela Truong, MD
Pediatrician
Pt. name Thi Tran
Age12
Date May 1, 2008
Address: 234 7th Avenue, Anacortes, WA 98221
RX Ceclor 10 mL bid X 10 d
Refill _0_ _X_Generic and/orequivalent allowed
Physician’s Signature
Angela Truong
Anacortes Pediatric Medical Office
23453 Mall Blvd.
Anacortes, WA 98221
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Questions
1) What is the drug name on the prescription? Click Here
Ceclor
2) What is the individual drug dosage? Click Here
10 milliliters twice a day
3) How many times a day is this medication to be given?
Click Here
For 10 days
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Listen
Listen and read along as Aisha defines medical
order and prescription.
Did you know that a medical order or medication order is a
drug order written in a hospital, nursing home, or recovery
center for a patient? A prescription is a drug order that is
written in an office or clinic or for a client or patient being
discharged. Licensed medical personnel like physicians, nurse
practitioners, and other certified practitioners are allowed
under state law to write medical orders and prescriptions.
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Task One: Reading the Doctor’s
Prescription
A doctor writes a prescription or drug orders for
patients. Again, a prescription is a written medication
order for a patient leaving a medical facility. A medical
order is used in a hospital or care facility. For example, a
patient in the hospital may have a change in medication
or need to have an increase or decrease in the amount of
medication. Both of these medical prescriptions follow a
similar format and include the essential information that
the pharmacy technician or other licensed health care
workers will use to fill the order. Please note that the
paper forms of prescriptions and medical orders do not
all look the same; however, the information is the same.
This information may be in a different location on the
form.
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Stop!
Safety Alert: A pharmacy
technician may fill the drug
order and work under the
supervision of the pharmacist.
The pharmacist will check and
verify the accuracy of each
filled prescription before
handing it to the patient or
client.
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Format
Look at the general format of a prescription.
Do you ever look carefully at your _Phone_#_________ -DEA# 123456878
Thelma Cook, MD
prescription before you hand it
2332 Medical Way
Renton, WA 98056
to the pharmacist or pharmacy
Pt. Name: ______________________ Age:__________
technician to fill? You should so
Address:______________________________________
X: ___________________________________________________________________
that you know what medicine you RRefill:
_____________
__________Generic
and/or equivalent allowed
are getting and the amount. You
can also ask the pharmacist
___________________________________Date______
Physician’s Signature
questions about what the doctor
has prescribed. The job of a
pharmacy technician requires careful reading. You need to
read the prescription carefully to understand the medication
ordered and then compare this drug order to the supply
available on the pharmacy shelves.
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Format
As a pharmacy technician, you need to read the prescription
carefully; otherwise, you may not select the correct medicine to
fill the bottle. This is especially true because many medications
have similar names and often times a particular medication
comes in several forms. The form of medication must match the
route, or way, that the medication will be taken. For example,
an elixir is a liquid and easily swallowed by a young child. An
older adult may take the medication in tablet or capsule form.
As a patient, you should check the number and type of
medicine you get from the pharmacy to make sure that it
matches what the doctor ordered.
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Think About It!
What information is included on the
prescription?
Why do you think that this information is
important to the pharmacist?
Advance to the next screen for the
answers.
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Answers
The prescription contains:
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
The patient’s or client’s full name
The date
The drug name
The doctor’s order for dosage amount (how much medication)
The administration route (by mouth, IV, injection)
The frequency with which the patient is to take the medication
The duration, the number of days that the patient is to take the
medication
The quantity or amount that the pharmacist is to dispense.
A check off or box allowing a substitute
The physician’s signature
The physician’s DEA number (United States Drug Enforcement
Agency registration number) if the medication is a controlled
substance such as morphine or codeine
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Answers
The medical community requires that all prescriptions
contain certain information. This is to avoid making medical
errors. Again, the information is not required to be in the
same format or placed in the same area on the prescription
form. Thus, there is no single form for medical orders and
prescriptions.
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Contents of a Prescription
Here are the eleven items of a prescription:
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
The patient’s or client’s full name
The date
The drug name
The doctor’s order for dosage amount (how much medication)
The administration route (by mouth, IV, injection)
The frequency with which the patient is to take the medication
The duration, the number of days that the patient is to take the
medication
The quantity or amount that the pharmacist is to dispense.
A check off or box allowing a substitute
The physician’s signature
The physician’s DEA number (United States Drug Enforcement
Agency registration number) if the medication is a controlled
substance such as morphine or codeine
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Example
Can you locate all eleven parts of the prescription?
Phone 425-235-9999
DEA# 123456878
Thelma Cook, MD
Pt. name Bruce BrownAge50Date April 29, 2008
Address: 12347 NE 2nd Street, Seattle, WA 98432
RX Darvon 1 g tab. p.o.q4 h.for 3 days
Refill _0_ ___Generic and/or equivalent allowed
Physician’s Signature ________________Thelma Cook
Sweet Meadow Medical Office
546 North Street
Seattle, WA 98045
+ Practice
Print, and fill in the chart with the information from the
prescription:
The patient’s or client’s full name
The date
The drug name in manufacturer or generic format
The doctor’s order for dosage amount (how much medication)
The administration route (by mouth, IV, injection)
The frequency with which the patient is to take the medication
The duration, the number of days that the patient is to take the
medication
The total quantity or amount that the pharmacist is to dispense
A check off or box allowing a generic substitute
The physician’s signature
The physician’s DEA number
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Answers
The patient’s or client’s full name
Bruce Brown
The date
April 29, 2008
The drug name in manufacturer or generic format
Darvon
The doctor’s order for dosage amount (how much medication)
1 gram
The administration route (by mouth, IV, injection)
Orally, by mouth
The frequency with which the patient is to take the medication
Every 4 hours
The duration, the number of days that the patient is to take the
medication
For 3 days
The total quantity or amount that the pharmacist is to dispense 4 hrs x 6 times a day
x 3 days =72 tablets
A check off or box allowing a generic substitute
No
The physician’s signature
Thelma Cook
The physician’s DEA number
123456878
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Practice
Practice locating the eleven parts of the medical order or
prescription. Complete your chart, and then compare it with
the answers on the next screen.
Phone 360-456-9999
DEA# 44567823
Buck Sawyer, MD
Pediatrician
Pt. name Sammie Smith
Age12
Date May 1, 2008
Address: 546 4th Avenue, Everett, WA 99876
RX Loratidine 5 mg tabletsqd X 5 d
Refill 1_
_X_Generic and/or equivalent allowed
Physician’s Signature ________________Buck Sawyer
Everett Pediatric Medical Office
23453 Mall Blvd.
Everett, WA 99876
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Answers
The patient’s or client’s full name
Sammie Smith
The date
May 1, 2008
The drug name in manufacturer or generic format
Loratidine
The doctor’s order for dosage amount (how much medication)
5 mg
The administration route (by mouth, IV, injection)
oral by mouth
The frequency with which the patient is to take the medication
qd-every day
The duration, the number of days that the patient is to take the
medication
X 5 d , daily for 5 days
The total quantity or amount that the pharmacist is to dispense 5 tablets
A check off or box allowing a generic substitute
Yes, it is checked, so a
generic may be used.
The physician’s signature
Buck Sawyer
The physician’s DEA number
44567823
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Practice
Read the prescription and then complete the chart below,
complete your chart, and then compare it with the answers on
the next screen.
Phone 206-777-9999
DEA# 98072653
Yu Thi Nguyen, MD
Gerontology
Pt. name Ethyl BonkerAge98
Date May 5, 2008
Address: 234 Madison Ave E., Seattle, 98021
RX acetaminophen 650 mg. tablets po. q 4h x 5 d
Refill _2_ _ _Generic and/or equivalent allowed
Physician’s Signature ________________NguyenYuThi
Capitol Hill Senior Medical Center,
3000 Broadway N., Seattle, WA 98045
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Answers
The patient’s or client’s full name
Ethyl Bonker
The date
May 5, 2008
The drug name in manufacturer or generic format
acetaminophen
The doctor’s order for dosage amount (how much medication)
650 mg.
The administration route (by mouth, IV, injection)
po., by mouth or orally
The frequency with which the patient is to take the medication
q 4h , every 4 hours
The duration, the number of days that the patient is to take the
medication
5 days
The total quantity or amount that the pharmacist is to dispense Every 4 hours x 6 times
a day x 5 days= 120
tablets
A check off or box allowing a generic substitute
no
The physician’s signature
NguyenYuThi
The physician’s DEA number
98072653
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Practice
Read the prescription and then complete the chart below,
complete your chart, and then compare it with the answers on
the next screen.
Phone 206-333-8888
DEA# 34455667
Pt. nameMohamed SomaAge 32
Address: 23234 Ballard Ave E., Seattle, 98567
RX Pencillin-G 2 million U IM qid X 7 d
Refill _0_ _ _Generic and/or equivalent allowed
Physician’s SignatureAretha Arnold, MDDate May 2, 2008
Aretha Arnold, MD
Infection Specialist
North Central Medical Center,
23 Antioch Way N., Seattle, WA 98655
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Answers
The patient’s or client’s full name
Mohamed Soma
The date
May 2, 2008
The drug name in manufacturer or generic format
Pencillin-G
The doctor’s order for dosage amount (how much medication)
2 million U- 2 million
units
The administration route (by mouth, IV, injection)
IM – intramuscular,
injection
The frequency with which the patient is to take the medication
qid
The duration, the number of days that the patient is to take the
medication
7 days
The total quantity or amount that the pharmacist is to dispense 56 million units
A check off or box allowing a generic substitute
no
The physician’s signature
Aretha Arnold
The physician’s DEA number
34455667
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Tablets
Listen and read along as Aisha discusses scored tablets.
scored tablet
Did you know that only tablets that are scored may be split in half?
What is a scored tablet? A tablet that is scored has a cut where it may
be divided. It is important to know that the only scored tablets are
divided along the score line to ensure an even distribution of
medication. Enteric-coated tablets, those tablets with a special
coating over the medicine, are not divided because they are coated
with a special substance that allows them to dissolve in the intestines
instead of the stomach. Dividing a tablet also impacts its absorption.
Capsules (two-part soft tablets) and suppositories (medicine
capsules inserted into the rectum) are never divided because the
medicine needs to remain coated when it enters the body and even
distribution of medication may be a problem
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Practice
Match the terms,Click Here to see the correct answers
1. Scored tablet
A. dry weight of a
medication
2. Capsule
B. liquid or syrup
3. Suppository
C. a tablet that is able to
be divided.
4. Elixir
D. a two-part tablet with
soft outer shell
5. mg
E. medication inserted
rectally
1. C
2. D
3. E
4. B
5. A
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Think About It!
Why do some drugs come in different
forms?
How do you know what form it comes in?
Advance to the next screen for the answers.
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Answers
Drugs come in different forms because there are many
different kinds of patients. For example, babies do not
swallow tablets so there are injections, liquids, and
suppositories. Adults can swallow tablets and capsules.
Also, different administration routes have different
absorption rates, or the medicine form determines how
quickly it will become effective. For example, a tablet
takes longer to work in the body than an injection. An
injection goes into blood stream quicker. A tablet must be
absorbed through the stomach and that takes time.
Read the prescription or medical order. Note that g or mg
or mcg is a dry weight and so these are tablets, capsules or
suppositories. Milliliters and units (a special unit of
measure used in medicine) are volume or liquid measures,
which could be elixirs or injections.
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Task Two: Understanding the
Parts of the Dosage Formula
The dosage formula has four parts. We use this formula to
translate a doctor’s order so that a pharmacy technician can
calculate an individual dose for a patient.
Doctor’s Order
Supply on Hand
x quantity = dosage to be administered
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Think About It!
Why would a formula assist a pharmacy
technician to calculate a drug dosage?
Click Here
Do you think that a formula can help sort out
the parts of a word problem? Click Here
A formula is an agreed
upon method of
calculating dosages in the
same way so that the
dosages are equivalent
(or equal).
Yes, because the quantities
represented in the formula
go in the same place in the
math equation. Pharmacy
technicians learn how to read
the prescriptions and
substitute the information
into the dosage formula.
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Dosage Formula
Let’s look at the parts of the dosage formula.
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Dosage Formula
Let’s look more closely at the parts of the dosage formula.
Information
Where is it located? What is the format for the
information?
Doctor’s Order
This information is on the prescription or in the
medical chart of the patient. The information will be
in grams(g), grains(gr), teaspoon(t), milliliter(mL)or
other medication format.
Supply on hand
On the pharmacy shelves, in a locked area for
controlled medications, in the refrigerator of the
pharmacy. The information will be on the drug’s label.
The information will be in grams(g), grains(gr),
teaspoon(t), milliliter(mL)or other medication format.
Quantity
This is the information from the drug label and the
information from the prescription. The information
will be in grams(g), grains(gr), teaspoon(t),
milliliter(mL)or other medication format.
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Dosage Formula
Another part of the prescription to know about is the medical
terms used to detail the doctor’s order.
To calculate an individual drug dosage, we use a formula. Patients
have individual dosages and daily doses. The formula is used to
calculate an individual or one time dose. The daily dose has to
do with the frequency of a dose.
qd = every day
every 8 hours
bid = twice a day
tid= three times a day
qid = four times daily
at hs = hour of sleep
prn = as needed
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Dosage Formula
Note that time does not play a
role in calculating the individual
dose. The factors are the
doctor’s order for an amount of
drug, the form of the medication
available in the pharmacy, and
the form of the medication
(tablet, capsule, mL).
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Units of Measure
Aisha is often asked to describe how much a gram,
milligram, and a microgram weigh. She shows the clients
this chart to show the relationship among these common
metric units of measure.
Kilogram
Gram
Milligram
2.2 pound
pineapple
a medium
paperclip
60 grains of salt
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Stop!
In the metric system, the
answers will be either whole
numbers or decimals. No
fractions are used in the metric
system. For example: 2.75
grams or 1.2 milliliters or 0.5
micrograms.
Also, any decimal number that
is not greater than 1 has a 0 in
front. So the correct form is 0.8
mL instead of .8 mL.
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Units of Measure
Abbreviation
Term
Format/Explanation
mg
Milligram
Dry weight measure used in tablets
mL
Milliliter
Liquid volume measure in liquids
gr
Grains
Dry weight of medication
g
gram
Dry weight measure used in tablets
IM
Intramuscular
U
Units
q
every
d
day
h
hour
po
orally
A measure for penicillin and insulin
Considered to be 24 hours
By mouth
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Practice
Practice matching the medication forms. Click Here
1. qid
A. by mouth or orally
2. hs
B. liquid or syrup
3. bid
C. every day
4. g
D. three times a day
5. mg
E. medication inserted
rectally
6. po
F. milligram
7. qd
G. four times a day
8. gr
H. at the hour of sleep;
bedtime
9. U
I. twice a day
10. tid
J. gram
11. Elix.
K. grain
12. Supp.
L. Unit
1. G
2. H
3. I
4. J
5. F
6. A
7. C
8. K
9. L
10. D
11. B
12. E
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Practice
Use the formula to practice substituting the information from
the prescription into the formula.
Doctor’s Order
Supply on Hand
x quantity = dosage to be administered
dd
hh x q = individual drug dose
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Stop!
Safety Alert: The quantity is
important to know because it
leads the pharmacy technician to
the correct form or unit of
measure for a specific drug. In
other words, if the quantity (q) is
a tablet, the individual dose will
be in tablets. If the quantity is in
milliliters, the pharmacy
technician knows that the
medication is in liquid form.
Including the quantity in the
formula, helps ensure proper
form of the medication. Young
children would take medication
in a liquid form while adults may
take a tablet or capsule.
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Task
Let’s put Aisha’s task together and see the medication vial and
the prescription and learn how they are the tools of the
pharmacy technician.
RX30 mg Augmentin
60 mg
Dr. Sheila Smith 4/6/08
Rx: Doctor Sheila Smith orders 30 mg of Augmentin for his
patient.
Ashia, a pharmacy technician, looks at the drug label and
discovers that the medicine is supplied in 60 milligrams
per tablet.
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Practice
Practice setting up the problems. Do not work the
problems yet.
(d) 30 mg x (q) 1 tablet = drug dose
(h) 60 mg
1) Order:
Supply on hand:
x
500 mg
250 mg per tablet
= drug dose Click Here
(d) 500mg x (q)1 tablet = drug dose
(h) 250mg
2) Order:
Supply on hand:
x
1000 mg
2000 mg per scored tablet
= drug dose Click Here
(d) 1000mg x (q)1 tablet = drug dose
(h) 2000mg
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Practice
3) Order:
Supply on hand:
x
4) Order:
Supply on hand:
x
5) Order:
Supply on hand:
x
1g
12. gr per capsule
= drug dose Click Here
(d) 1gr x (q)1 capsule= drug dose
(h) ½ gr
50 mg
25mg per 5 mL
= drug dose Click Here
(d) 50mg x (q) 5mL= drug dose
(h) 25mg
500 mg
125mg per caplet
= drug dose Click Here
(d) 500mg x (q) 1 caplet= drug dose
(h) 125mg
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Task Three: Calculating the
Dosage Formula
To calculate a doctor’s drug order (how much medication is
needed for an individual dose), we use a formula.
Doctor’s Order
Supply on Hand
x quantity = dosage to be administered
Review: Remember that the
fraction bar means to divide.
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Methods
There are two ways to look at calculating this formula.
Method 1: Multiply d (doctor’s order) times q (format of the
medicine on hand) then divide the result by h (supply on hand).
The doctor orders 250 mg of a medication. Aisha has the
medication in 125 mg per capsule in her pharmacy’s supplies.
250mg
125mg x 1 capsule = _________
a) 250 x 1 = 250
b)250 ÷ 125 = 2
Thus, the answer is 2 capsules, but it is a bad habit to get into, if
it wasn’t a 1 in the quantity you’d get an incorrect answer.
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Methods
Method 2: Divide d (the doctor’s order, the numerator, or top
number) by h (the supply on hand, the denominator, or bottom
number) then multiply by q (the format of the medicine on hand).
The doctor orders 250 mg of a medication. Aisha has the
medication in 125 mg per capsule in her pharmacy’s supplies.
250mg
125mg x 1 capsule = _________
a) 250÷125 = 2
b) 2 x 1 =2
Thus, the answer is 2 capsules.
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Simplify
One of the things to consider is the possibility of simplifying
the expression before multiplying or dividing. For example,
Aisha filled this prescription earlier in the day.
The doctor order 100 milligrams of a medication. The drug was
available in 25 milligrams per 5 milliliters.
100mg
25mg x 5 milliliters = _________
100mg 100mg
25mg x 5 milliliters = 5 mg x 1milliliters = 100 5 = 20
Thus, the answer is 20. Notice since 5 divides evenly into 25,
Aisha simplifies the expression before multiplying or dividing.
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Practice
Practice simplifying expressions to be ready to work with Aisha.
1) 25mg
100 mg x 20 milliliters =
Click
5 mL Here
2) 5mg
32mg x 8 milliliters =
Click
Here
1.25 mL
3) 500mg
50 mg x 2 milliliters =
20 mLHere
Click
4) 75mg
5mg x 20 milliliters =
Click
Here
300mL
5) 25mg
100mg x 5 milliliters =
1.25 mL
Click
Here
6)
5mg
100mg x 20 milliliters =
Click
31 mLHere
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Practice
Aisha needs to fill the following drug orders for the evening shift
nurses.
Assist her in the set up and the solutions of each medical
order.
1) Ampillicin 500 mg p.o. qid X 5 d. Dosage available: 250 mg
capsules. Click Here
______________ x __________ = ____________ 2 capsules
2) Ordered Clondine 0.4 mg p.o. bid X 3 d. Dosage available: 0.1
mg tablets. Click Here
______________ x __________ = ____________ 4 tablets
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Practice
3) Prescribed: Tigan 200 mg IM q 8 h x 4 d for nausea. On hand:
Single use vials 100mg/1mL. Click Here
______________ x __________ = ____________ 2 milliliters or 2 mL
4) Give: Digoxin elixir 150 mcg stat p.o. Dosage available: 50
mcg/mL. Click Here
______________ x __________ = ____________ 3 milliliters or 3 mL
5) Ordered: Codeine sulfate 60 mg p.o. q 4 h until further
notice. Dosage available: 30 mg tablets. Click Here
______________ x __________ = ____________ 2 tablets
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Practice
Put the pieces together to complete the following medication
orders as Aisha would.
Read the prescription, and look at the medication bottle.
Then use the dosage formula (d/h x q) to calculate the drug
order.
1.
Phone 206-344-8888
DEA# 98098766
Bertha Bolls, MD
Pt. name KumiKaurAge30
Date May 1, 2008
Address: 2349 Busy Ave E., Seattle, 98567
RX Lasik40 mg p.o. q 12 h x 4 d
Refill _0_ _Generic and/or equivalent allowed
Physician’s Signature
Bertha Bolls, MD
South Central Medical Center,
34 Burlington Way N., Seattle, WA 98655
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Practice
Supply on Hand
Lasix 20 mg tablets
Set up your formula:x=
The patient will receiveeach
dose. Click Here
2 tablets
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Practice
Read the prescription, look at the vial, then calculate the drug
order.
Phone 206-355-9999
DEA# 45632144
Richard Smalls, MD
Pt. name Brenda GuilianiAge44
Date May 1, 2008
Address: 65 Lake Drive E., Seattle, 98567
RX Ampicillin 250 mg p.o.qid x 10 days
Refill _0_ _ _Generic and/or equivalent allowed
Physician’s SignatureRichard Smalls, MD
Mid Central Medical Center,
64 Booth Garnder Way N., Seattle, WA 98655
Ampicillin
125 mg capsules
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Answer
Set up your formula:x=
2 capsules
The patient will receiveeach
dose. Click Here
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Practice
Read the prescription, look at the vial, then calculate the drug
order.
Phone 206-888-9999
DEA# 546565651
Wing Hu Chi, MD
Pt. name Elsa Bridges Age23 Date May 7, 2008
Address: 45 Riveria Way, Seattle, 98567
RX Ampicillintrihydrate 250 mg p.o. qid x 10 days
Refill _0_ _ _Generic and/or equivalent allowed
Physician’s SignatureWing Hu Chi, MD
Lake View Medical Center,
54 Sealth Blvd. N., Seattle, WA 98655
Ampicillintrihydrate
125 mg in 5 mL of
syrup
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Answer
Set up your formula:x=
The patient will receiveeach dose. Click Here
10 milliliters or 10 mL
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Task Four: Calculate daily doses
and beyond
When Aisha is not filling individual medical
orders, she often has a stack of other
prescriptions to fill for her supervising
pharmacist. She must prepare these for him to
review for accuracy before they are bagged
and binned for the customers to pick up at the
pharmacy.
To do this she must correctly interpret the
prescriptions, duration, and/or the number of
individual doses that the doctor has ordered.
This relies on her skills in addition and
multiplication as well as her ability to read the
prescription.
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Think About It!
Why would a pharmacy technician need to
be able to calculate a full prescription
dosage?
To fill the complete
Click Here prescriptions for clients. For
example, clients do not go to
the pharmacy on a daily basis.
They go once to get the
complete order filled.
Do you think that multiplication is the most
efficient means to solve this problem?
Click Here Yes, multiplication is usually
faster than adding the number
over and over.
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Review
Let’s review an earlier prescription:
Phone 206-333-8888
DEA# 34455667
Pt. nameMohamed SomaAge 32
Address: 23234 Ballard Ave E., Seattle, 98567
RX Pencillin-G 2 million U IM qid X 7 d
Refill _0_ _ _Generic and/or equivalent allowed
Physician’s SignatureAretha Arnold, MDDate May 2, 2008
Aretha Arnold, MD
Infection Specialist
North Central Medical Center,
23 Antioch Way N., Seattle, WA 98655
The key to filling
this prescription for
the patient is to read
the line:
Penicillin-G 2
million U IM quid
x 7 d.
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Review
Penicillin-G 2 million U IM quid x 7 d.
This translates to 2 million units 4 times a day x 7 days.
So to figure out the daily dosage:
a) 2 million units x 4 = 8 million units
b) To figure out 7 days’ dosage, multiply 8 million units x
7 days.
For 7 days’ supply, the pharmacy must have on hand 56 million
units of Penicillin-G.
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Practice
Help Aisha calculate the daily and the total prescription by
days. Advance to the next screen for the answers.
Doctor’s order
Available Supply Individual Dose
Give Ciprofloxin 750
mg1 tab po a day for
10 d
Give MedXZ 300 mg
bid x 14 d
Give Amoxicillin 500
mg capsule potid x
10 d
Order reads:
Prednisone
40 mg po bid x 3d
PenVK 250mg po qid x
10 d
500 mg scored tablets
MedXZ
200 mg/5 ml
500 mg/1 capsule
Prednisone
10 mg tab
PenVK 250mg/1 tsp
Total dose to fill
the complete
prescription
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Answers
Doctor’s order
Available Supply Individual Dose
Total dose to fill
the complete
prescription
Give Ciprofloxin 750
mg1 tab po a day for
10 d
500 mg scored tablets
1 ½ tablets
15 tablets
750mg
500mg x 1 tab
1 ½x 10
Give MedXZ 300 mg
bid x 14 d
MedXZ
200 mg/5 ml
7.5 milliliters
210 milliliters
300mg
200mg x 1 tab
7.5 x 2 x 14
1 capsule
30 capsules
500mg
500mg x 1 cap
1 x 3 x10
4 tablets
24 tablets
40mg
10mg x 1 tab
4x2x3
1 teaspoon
40 teaspoons
250mg
250mg x 1 tsp
1 x 4 x 10
Give Amoxicillin 500
mg capsule potid x
10 d
500 mg/1 capsule
Order reads:
Prednisone
40 mg po bid x 3d
Prednisone
10 mg tab
PenVK 250mg poqid x
10 d
PenVK 250mg/1 tsp
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Key Math Concepts
1) Using a formula to calculate dosage
2) Addition
3) Multiplication
4) Division
5) Apply the standard forms used in health care
6) Sorting needed information from extra information in a
word problem
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Math Vocabulary
Calculate
Simplify an
expression
Per
Divide
Formula
Fraction
Gram
Milligram
Multiply
Milliliter
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Quiz: Calculating Drug Dosage
1) The doctor has ordered Zyloprim 0.25 g twice a day. The
pharmacy has on hand: Zyloprim 0.1 g scored tablets. The
patient will receive the following individual
2 ½ tablets
dose:_________________________
Click Here
2) Order:
Available:
Give:
75 milligrams of medication x
25 milligrams in 2 milliliters
Click6 Here
milliliters or 6 mL
3) Give Dilaudid1.5 milligram IM from a vial that is labeled 0.6
2.5 milliliters or 2.5 mL
milligrams per milliliter. Give
Click Here
4) Order: Zocor 40 milligrams; On hand: Zocar 20 milligrams per
2 tablets
tablet. Give Click Here
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Quiz
5) Dr. Mix prescribes Procardia XL 60 milligrams once daily.
The drug on hand is Procardia XL 30milligram tablets. The
2 tablets
patient will receive _________________________
Click Here
6) The physician orders Plendil 7.5 mg once a day in the
morning. The drug label reads: Plendil (felodipine) 2.5 mg
tab. Give Click Here 3 tablets
7) The doctor’s order is for 20 milligrams of a medication. You
have 10 milligrams per 5 milliliters. The dosage to be
10 milliliters
or 10 mL
administered is Click
Here
8) Order: 1.25 milligrams of a medication. On hand is 0.25
milligrams in 5 milliliters of the medication.
25 milliliters
or 25 mL
Give Click
Here
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Quiz
9) The pharmacy has 15 milligram tablets on the shelf. Dr.
Smith orders 30 milligrams of Phenobarbital. The patient
2 tablets
will receive _________________________
Click Here
10) Read the prescription, look at the vial, and calculate the
drug order.
Phone 206-888-9999
DEA# 54699999
Mori Chisata, MD
Pt. name Tommy Smart Age 22
Date May 5, 2008
Address: 23 Roosevelt Way, Seattle, WA 98567
RX Neurontin 375 mg p.o. tid x 7 days
Refill _0_ _ _Generic and/or equivalent allowed
Physician’s SignatureMoriChisata, MD
Lake View Medical Center,
125 Bridge Blvd. S., Seattle, WA 98655
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Quiz
10) cont.
Supply on Hand
Set up your formula: ______________ x __________ = ____________
The individual dose . 7.5 milliliters or 7.5 mL
A seven-day supply will be .157.5
Clickmilliliters
Here or 157.5 mL
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Congratulations!
You have completed the Math Module.