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Slide 1
Slide 2
+ Pharmacy Technician Math Module
Slide 3
+ 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.
Slide 4
+ 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
Slide 5
+ 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.
Slide 6
+ 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 doctors prescriptions and consider the following
questions: Phone 360-293-9999DEA# 23476512 Angela Truong, MD
Pediatrician Pt. name Thi Tran Age 12 Date May 1, 2008 Address: 234
7th Avenue, Anacortes, WA 98221 R X Ceclor 10 mL bid X 10 d Refill
_ 0 _ _ X _Generic and/orequivalent allowed Physicians Signature
Angela Truong Anacortes Pediatric Medical Office 23453 Mall Blvd.
Anacortes, WA 98221
Slide 7
+ Questions 1) What is the drug name on the prescription? Click
Here 2) What is the individual drug dosage? Click Here 3) How many
times a day is this medication to be given? Click Here Ceclor 10
milliliters twice a day For 10 days
Slide 8
+ 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.
Slide 9
+ Task One: Reading the Doctors 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.
Slide 10
+ 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.
Slide 11
+ Format Look at the general format of a prescription. Do you
ever look carefully at your prescription before you hand it to the
pharmacist or pharmacy technician to fill? You should so that you
know what medicine you are getting and the amount. You can also ask
the pharmacist 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. _Phone_#_________ -DEA# 123456878 Thelma
Cook, MD 2332 Medical Way Renton, WA 98056 Pt. Name:
______________________ Age:__________
Address:______________________________________ R X:
___________________________________________________________________
Refill: _____________ __________Generic and/or equivalent allowed
___________________________________Date______ Physicians
Signature
Slide 12
+ 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.
Slide 13
+ 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.
Slide 14
+ Answers The prescription contains: a)The patients or clients
full name b)The date c)The drug name d)The doctors order for dosage
amount (how much medication) e)The administration route (by mouth,
IV, injection) f)The frequency with which the patient is to take
the medication g)The duration, the number of days that the patient
is to take the medication h)The quantity or amount that the
pharmacist is to dispense. i)A check off or box allowing a
substitute j)The physicians signature k)The physicians DEA number
(United States Drug Enforcement Agency registration number) if the
medication is a controlled substance such as morphine or
codeine
Slide 15
+ 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.
Slide 16
+ Contents of a Prescription Here are the eleven items of a
prescription: a)The patients or clients full name b)The date c)The
drug name d)The doctors order for dosage amount (how much
medication) e)The administration route (by mouth, IV, injection)
f)The frequency with which the patient is to take the medication
g)The duration, the number of days that the patient is to take the
medication h)The quantity or amount that the pharmacist is to
dispense. i)A check off or box allowing a substitute j)The
physicians signature k)The physicians DEA number (United States
Drug Enforcement Agency registration number) if the medication is a
controlled substance such as morphine or codeine
Slide 17
+ Example Can you locate all eleven parts of the prescription?
Phone 425-235-9999 DEA# 123456878 Thelma Cook, MD Pt. name Bruce
Brown Age 50 Date April 29, 2008 Address: 12347 NE 2nd Street,
Seattle, WA 98432 R X Darvon 1 g tab. p.o.q4 h.for 3 days Refill _
0 _ ___Generic and/or equivalent allowed Physicians Signature
________________ Thelma Cook Sweet Meadow Medical Office 546 North
Street Seattle, WA 98045
Slide 18
+ Practice Print, and fill in the chart with the information
from the prescription: The patients or clients full name The date
The drug name in manufacturer or generic format The doctors 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 physicians signature The physicians DEA number
Slide 19
+ Answers The patients or clients full nameBruce Brown The
dateApril 29, 2008 The drug name in manufacturer or generic
formatDarvon The doctors 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 medicationEvery 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 substituteNo The physicians signatureThelma Cook The
physicians DEA number123456878
Slide 20
+ 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 360-456-9999DEA#
44567823 Buck Sawyer, MD Pediatrician Pt. name Sammie Smith Age 12
Date May 1, 2008 Address: 546 4th Avenue, Everett, WA 99876 R X
Loratidine 5 mg tabletsqd X 5 d Refill 1_ _ X _Generic and/or
equivalent allowed Physicians Signature ________________ Buck
Sawyer Everett Pediatric Medical Office 23453 Mall Blvd. Everett,
WA 99876 Phone 360-456-9999DEA# 44567823 Buck Sawyer, MD
Pediatrician Pt. name Sammie Smith Age 12 Date May 1, 2008 Address:
546 4th Avenue, Everett, WA 99876 R X Loratidine 5 mg tabletsqd X 5
d Refill 1_ _ X _Generic and/or equivalent allowed Physicians
Signature ________________ Buck Sawyer Everett Pediatric Medical
Office 23453 Mall Blvd. Everett, WA 99876
Slide 21
+ Answers The patients or clients full nameSammie Smith The
dateMay 1, 2008 The drug name in manufacturer or generic
formatLoratidine The doctors 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 medicationqd-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 substituteYes, it is
checked, so a generic may be used. The physicians signatureBuck
Sawyer The physicians DEA number44567823
Slide 22
+ 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 206-777-9999DEA# 98072653 Yu Thi Nguyen, MD
Gerontology Pt. name Ethyl Bonker Age 98 Date May 5, 2008 Address:
234 Madison Ave E., Seattle, 98021 R X acetaminophen 650 mg.
tablets po. q 4h x 5 d Refill _ 2 _ _ _Generic and/or equivalent
allowed Physicians Signature ________________ NguyenYuThi Capitol
Hill Senior Medical Center, 3000 Broadway N., Seattle, WA
98045
Slide 23
+ Answers The patients or clients full nameEthyl Bonker The
dateMay 5, 2008 The drug name in manufacturer or generic
formatacetaminophen The doctors 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 medicationq 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 substituteno The physicians
signatureNguyenYuThi The physicians DEA number98072653
Slide 24
+ 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 206-333-8888DEA# 34455667 Pt. name Mohamed
Soma Age 32 Address: 23234 Ballard Ave E., Seattle, 98567 R X
Pencillin-G 2 million U IM qid X 7 d Refill _ 0 _ _ _Generic and/or
equivalent allowed Physicians Signature Aretha Arnold, MD Date May
2, 2008 Aretha Arnold, MD Infection Specialist North Central
Medical Center, 23 Antioch Way N., Seattle, WA 98655
Slide 25
+ Answers The patients or clients full nameMohamed Soma The
dateMay 2, 2008 The drug name in manufacturer or generic
formatPencillin-G The doctors 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 medicationqid 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
substituteno The physicians signatureAretha Arnold The physicians
DEA number34455667
Slide 26
+ Tablets Listen and read along as Aisha discusses scored
tablets. 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 scored tablet
Slide 27
+ Practice 1. Scored tabletA. dry weight of a medication 2.
CapsuleB. liquid or syrup 3. SuppositoryC. a tablet that is able to
be divided. 4. ElixirD. a two-part tablet with soft outer shell 5.
mgE. medication inserted rectally M atch the terms,Click Here to
see the correct answers 1. C 2. D 3. E 4. B 5. A
Slide 28
+ 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.
Slide 29
+ 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.
Slide 30
+ Task Two: Understanding the Parts of the Dosage Formula The
dosage formula has four parts. We use this formula to translate a
doctors order so that a pharmacy technician can calculate an
individual dose for a patient. Doctors Order Supply on Hand x
quantity = dosage to be administered
Slide 31
+ 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.
Slide 32
+ Dosage Formula Lets look at the parts of the dosage
formula.
Slide 33
+ Dosage Formula Lets look more closely at the parts of the
dosage formula. InformationWhere is it located? What is the format
for the information? Doctors OrderThis 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 handOn the
pharmacy shelves, in a locked area for controlled medications, in
the refrigerator of the pharmacy. The information will be on the
drugs label. The information will be in grams(g), grains(gr),
teaspoon(t), milliliter(mL)or other medication format. QuantityThis
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.
Slide 34
+ Dosage Formula Another part of the prescription to know about
is the medical terms used to detail the doctors 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 dayevery 8 hours bid =
twice a dayat hs = hour of sleep tid= three times a dayprn = as
needed qid = four times daily
Slide 35
+ Dosage Formula Note that time does not play a role in
calculating the individual dose. The factors are the doctors order
for an amount of drug, the form of the medication available in the
pharmacy, and the form of the medication (tablet, capsule,
mL).
Slide 36
+ 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. KilogramGramMilligram 2.2 pound pineapple a medium
paperclip 60 grains of salt
Slide 37
+ 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.
Slide 38
+ Units of Measure AbbreviationTermFormat/Explanation
mgMilligramDry weight measure used in tablets mLMilliliterLiquid
volume measure in liquids grGrainsDry weight of medication ggramDry
weight measure used in tablets IMIntramuscular UUnitsA measure for
penicillin and insulin qevery ddayConsidered to be 24 hours hhour
poorallyBy mouth
Slide 39
+ Practice Practice matching the medication forms. Click Here
1. qidA. by mouth or orally 2. hsB. liquid or syrup 3. bidC. every
day 4. gD. three times a day 5. mgE. medication inserted rectally
6. poF. milligram 7. qdG. four times a day 8. grH. at the hour of
sleep; bedtime 9. UI. twice a day 10. tidJ. 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
Slide 40
+ Practice Use the formula to practice substituting the
information from the prescription into the formula. dd hh x q =
individual drug dose Doctors Order Supply on Hand x quantity =
dosage to be administered
Slide 41
+ 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.
Slide 42
+ Task Lets put Aishas task together and see the medication
vial and the prescription and learn how they are the tools of the
pharmacy technician. 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. 60 mg R X 30 mg Augmentin Dr. Sheila Smith
4/6/08
Slide 43
+ 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: 500 mg Supply on hand:250 mg per tablet x = drug dose Click
Here 2) Order: 1000 mg Supply on hand:2000 mg per scored tablet x =
drug dose Click Here (d) 500mg x (q)1 tablet = drug dose (h) 250mg
(d) 1000mg x (q)1 tablet = drug dose (h) 2000mg
Slide 44
+ Practice 3) Order: 1 g Supply on hand:12. gr per capsule x =
drug dose Click Here 4) Order: 50 mg Supply on hand:25mg per 5 mL x
= drug dose Click Here 5) Order: 500 mg Supply on hand:125mg per
caplet x = drug dose Click Here (d) 1gr x (q)1 capsule= drug dose
(h) gr (d) 50mg x (q) 5mL= drug dose (h) 25mg (d) 500mg x (q) 1
caplet= drug dose (h) 125mg
Slide 45
+ Task Three: Calculating the Dosage Formula To calculate a
doctors drug order (how much medication is needed for an individual
dose), we use a formula. Review: Remember that the fraction bar
means to divide. Doctors Order Supply on Hand x quantity = dosage
to be administered
Slide 46
+ Methods There are two ways to look at calculating this
formula. Method 1: Multiply d (doctors 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 pharmacys 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 wasnt a 1
in the quantity youd get an incorrect answer.
Slide 47
+ Methods Method 2: Divide d (the doctors 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 pharmacys supplies. 250mg 125mg x 1
capsule = _________ a) 250125 = 2 b) 2 x 1 =2 Thus, the answer is 2
capsules.
Slide 48
+ 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.
Slide 49
+ Practice Practice simplifying expressions to be ready to work
with Aisha. 1) 25mg 100 mg x 20 milliliters = Click Here 2) 5mg
32mg x 8 milliliters = Click Here 3) 500mg 50 mg x 2 milliliters =
Click Here 4) 75mg 5mg x 20 milliliters = Click Here 5) 25mg 100mg
x 5 milliliters = Click Here 6) 5mg 100mg x 20 milliliters = Click
Here 5 mL 1.25 mL 20 mL 300mL 1.25 mL 31 mL
Slide 50
+ 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) Ordered Clondine 0.4 mg p.o. bid X 3
d. Dosage available: 0.1 mg tablets. Click Here ______________ x
__________ = ____________ 2 capsules 4 tablets
Slide 51
+ 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 __________ = ____________ 4) Give: Digoxin elixir
150 mcg stat p.o. Dosage available: 50 mcg/mL. Click Here
______________ x __________ = ____________ 5) Ordered: Codeine
sulfate 60 mg p.o. q 4 h until further notice. Dosage available: 30
mg tablets. Click Here ______________ x __________ = ____________ 2
milliliters or 2 mL 3 milliliters or 3 mL 2 tablets
Slide 52
+ 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 KumiKaur Age 30 Date May 1, 2008 Address:
2349 Busy Ave E., Seattle, 98567 R X Lasik40 mg p.o. q 12 h x 4 d
Refill _ 0 _ _Generic and/or equivalent allowed Physicians
Signature Bertha Bolls, MD South Central Medical Center, 34
Burlington Way N., Seattle, WA 98655 Phone 206-344-8888 DEA#
98098766 Bertha Bolls, MD Pt. name KumiKaur Age 30 Date May 1, 2008
Address: 2349 Busy Ave E., Seattle, 98567 R X Lasik40 mg p.o. q 12
h x 4 d Refill _ 0 _ _Generic and/or equivalent allowed Physicians
Signature Bertha Bolls, MD South Central Medical Center, 34
Burlington Way N., Seattle, WA 98655
Slide 53
+ Practice Supply on Hand Set up your formula:x= The patient
will receiveeach dose. Click Here Lasix 20 mg tablets 2
tablets
Slide 54
+ Practice Read the prescription, look at the vial, then
calculate the drug order. Phone 206-355-9999DEA# 45632144 Richard
Smalls, MD Pt. name Brenda Guiliani Age 44 Date May 1, 2008
Address: 65 Lake Drive E., Seattle, 98567 R X Ampicillin 250 mg
p.o.qid x 10 days Refill _ 0 _ _ _Generic and/or equivalent allowed
Physicians Signature Richard Smalls, MD Mid Central Medical Center,
64 Booth Garnder Way N., Seattle, WA 98655 Phone 206-355-9999DEA#
45632144 Richard Smalls, MD Pt. name Brenda Guiliani Age 44 Date
May 1, 2008 Address: 65 Lake Drive E., Seattle, 98567 R X
Ampicillin 250 mg p.o.qid x 10 days Refill _ 0 _ _ _Generic and/or
equivalent allowed Physicians Signature Richard Smalls, MD Mid
Central Medical Center, 64 Booth Garnder Way N., Seattle, WA 98655
Ampicillin 125 mg capsules
Slide 55
+ Answer Set up your formula:x= The patient will receiveeach
dose. Click Here 2 capsules
Slide 56
+ Practice Read the prescription, look at the vial, then
calculate the drug order. Phone 206-888-9999DEA# 546565651 Wing Hu
Chi, MD Pt. name Elsa Bridges Age 23 Date May 7, 2008 Address: 45
Riveria Way, Seattle, 98567 R X Ampicillintrihydrate 250 mg p.o.
qid x 10 days Refill _ 0 _ _ _Generic and/or equivalent allowed
Physicians Signature Wing Hu Chi, MD Lake View Medical Center, 54
Sealth Blvd. N., Seattle, WA 98655 Phone 206-888-9999DEA# 546565651
Wing Hu Chi, MD Pt. name Elsa Bridges Age 23 Date May 7, 2008
Address: 45 Riveria Way, Seattle, 98567 R X Ampicillintrihydrate
250 mg p.o. qid x 10 days Refill _ 0 _ _ _Generic and/or equivalent
allowed Physicians Signature Wing Hu Chi, MD Lake View Medical
Center, 54 Sealth Blvd. N., Seattle, WA 98655 Ampicillintrihydrate
125 mg in 5 mL of syrup
Slide 57
+ Answer Set up your formula:x= The patient will receiveeach
dose. Click Here 10 milliliters or 10 mL
Slide 58
+ 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.
Slide 59
+ Think About It! Why would a pharmacy technician need to be
able to calculate a full prescription dosage? Click Here Do you
think that multiplication is the most efficient means to solve this
problem? Click Here To fill the complete 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. Yes, multiplication
is usually faster than adding the number over and over.
Slide 60
+ Review Lets review an earlier prescription: Phone
206-333-8888DEA# 34455667 Pt. name Mohamed Soma Age 32 Address:
23234 Ballard Ave E., Seattle, 98567 R X Pencillin-G 2 million U IM
qid X 7 d Refill _ 0 _ _ _Generic and/or equivalent allowed
Physicians Signature Aretha Arnold, MD Date 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.
Slide 61
+ 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.
Slide 62
+ Practice Help Aisha calculate the daily and the total
prescription by days. Advance to the next screen for the answers.
Doctors orderAvailable SupplyIndividual Dose Total dose to fill the
complete prescription Give Ciprofloxin 750 mg1 tab po a day for 10
d 500 mg scored tablets Give MedXZ 300 mg bid x 14 d MedXZ 200 mg/5
ml 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 po qid x 10 d PenVK 250mg/1 tsp
Slide 63
+ Answers Doctors orderAvailable SupplyIndividual Dose Total
dose to fill the complete prescription Give Ciprofloxin 750 mg1 tab
po a day for 10 d 500 mg scored tablets 1 tablets 750mg 500mg x 1
tab 15 tablets 1 x 10 Give MedXZ 300 mg bid x 14 d MedXZ 200 mg/5
ml 7.5 milliliters 300mg 200mg x 1 tab 210 milliliters 7.5 x 2 x 14
Give Amoxicillin 500 mg capsule potid x 10 d 500 mg/1 capsule 1
capsule 500mg 500mg x 1 cap 30 capsules 1 x 3 x10 Order reads:
Prednisone 40 mg po bid x 3d Prednisone 10 mg tab 4 tablets 40mg
10mg x 1 tab 24 tablets 4 x 2 x 3 PenVK 250mg poqid x 10 d PenVK
250mg/1 tsp 1 teaspoon 250mg 250mg x 1 tsp 40 teaspoons 1 x 4 x
10
Slide 64
+ 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
Slide 65
+ Math Vocabulary Calculate Simplify an expression Per Divide
Formula Fraction Gram Milligram Multiply Milliliter
Slide 66
+ 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
dose:_________________________ Click Here 2) Order:75 milligrams of
medication x Available:25 milligrams in 2 milliliters Give:Click
Here 3) Give Dilaudid1.5 milligram IM from a vial that is labeled
0.6 milligrams per milliliter. Give Click Here 4) Order: Zocor 40
milligrams; On hand: Zocar 20 milligrams per tablet. Give Click
Here 2 tablets 6 milliliters or 6 mL 2.5 milliliters or 2.5 mL 2
tablets
Slide 67
+ Quiz 5) Dr. Mix prescribes Procardia XL 60 milligrams once
daily. The drug on hand is Procardia XL 30milligram tablets. The
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 7)
The doctors order is for 20 milligrams of a medication. You have 10
milligrams per 5 milliliters. The dosage to be administered is
Click Here 8) Order: 1.25 milligrams of a medication. On hand is
0.25 milligrams in 5 milliliters of the medication. Give Click Here
2 tablets 3 tablets 10 milliliters or 10 mL 25 milliliters or 25
mL
Slide 68
+ Quiz 9) The pharmacy has 15 milligram tablets on the shelf.
Dr. Smith orders 30 milligrams of Phenobarbital. The patient will
receive _________________________ Click Here 10) Read the
prescription, look at the vial, and calculate the drug order. 2
tablets Phone 206-888-9999DEA# 54699999 Mori Chisata, MD Pt. name
Tommy Smart Age 22 Date May 5, 2008 Address: 23 Roosevelt Way,
Seattle, WA 98567 R X Neurontin 375 mg p.o. tid x 7 days Refill _ 0
_ _ _Generic and/or equivalent allowed Physicians Signature
MoriChisata, MD Lake View Medical Center, 125 Bridge Blvd. S.,
Seattle, WA 98655 Phone 206-888-9999DEA# 54699999 Mori Chisata, MD
Pt. name Tommy Smart Age 22 Date May 5, 2008 Address: 23 Roosevelt
Way, Seattle, WA 98567 R X Neurontin 375 mg p.o. tid x 7 days
Refill _ 0 _ _ _Generic and/or equivalent allowed Physicians
Signature MoriChisata, MD Lake View Medical Center, 125 Bridge
Blvd. S., Seattle, WA 98655
Slide 69
+ Quiz 10) cont. Set up your formula: ______________ x
__________ = ____________ The individual dose. A seven-day supply
will be. Click Here Supply on Hand 7.5 milliliters or 7.5 mL 157.5
milliliters or 157.5 mL
Slide 70
+ Congratulations! You have completed the Math Module.