Calculations of Unit of Measure Relating to International Units,
Session 5: Calculations of Unit of Measure Relating to International Units,
Imperial Units and Household Equivalent
Total Session Time: 120 minutes + 1 hours Assignment
Prerequisites
None
Learning Tasks
By the end of this session students are expected to be able to:
equivalent and vice versa
Resources Needed:
SESSION OVERVIEW
|Step |Time |Activity/ |Content |
| | |Method | |
|1 |05 minutes |Presentation |Introduction, Learning Tasks |
|2 |40 minutes |Presentation |International Units, Imperial Units |
| | | |and Household Equivalent |
|3 |40 minutes |Presentation |Conversion of International Units, |
| | | |Imperial Units, Metric System, |
| | | |Household Equivalent and Vice Versa |
|4 |10 minutes |Presentation |Key Points |
|5 | |Presentation |Evaluation |
| |15 minutes | | |
|6 |10 minutes |Presentation |Take home assignment |
SESSION CONTENTS
STEP 1: Presentation of Session Title and Learning Tasks (5 minutes)
READ or ASK students to read the learning tasks and clarify
ASK students if they have any questions before continuing.
STEP 2: International Units, Imperial Units and Household Equivalent (40
Minutes)
o The international unit is a unit of measurement for the amount of a
substance; the mass or volume that constitutes one international unit
varies based on which substance is being measured
o The variance is based on the biological activity or effect, for the
purpose of easier comparison across substances
o International units are used to
quantify vitamins, hormonessome medications, vaccines, blood products,
and similar biologically active substances.
o The name international unit has often been capitalized
o It is often abbreviated as IU in English; as UI in Romance languages
o Many biological agents exist in different forms or preparations
o The goal of the IU is to be able to compare these, so that different
forms or preparations with the same biological effect will contain the
same number of IUs
For examples:
25 ng cholecalciferol/ergocalciferol
acetate
o The Imperial units or the Imperial system is a collection of
measurement units
by Commonwealth countries but they later changed to the metric system.
o Is a system of measure used in homes, particularly in kitchens
o The units of household measure for volume include teaspoonful,
tablespoonful, pint, quart, and gallon
o The units of household measure for weight are pounds and ounces
o Measuring volume using the household measure is less accurate than
using other systems because the measuring utensils can vary in size
o Nevertheless, house-hold volume measure may be used in community
pharmacy practice when dispensing drugs that will be administered in
the patient’s home because patients may not have other measuring
devices at home
o Labels instructing patients on how to take a medication often use
household measure units for this reason
STEP 3: Conversion of International Units, Metric Unit, Imperial Units and
Household Equivalent (40 Minutes)
Table 1: Conversion of International Units, Imperial Units, Metric System
and
Household measurements
|WEIGH|IMPERIAL |METRIC |
|TS | | |
| | |Mg |G |Kg |
| |7000gr | | | |
| |1 grain (gr) |65 |0.065 | |
| | 0.0154 gr |1 |0.001 | |
| | | |mL |L |
|VOLUM| | | | |
|E | | | | |
| |1 minim (min) | |0.059 | |
| | 16.89 min | |1 | |
Table 2: Conversion Equivalent of Household, Apothecary and Metric Systems
| |Equivalent value |
|Unit of measure |Apothecary |Metric |
|(Household) | | |
|1 Tumblerful |8 Fluidounces |240 Milliliters |
|1 Teacupful |4 Fluidounces |120 Milliliters |
|1 Wineglass |2 Fluidounces |60 Milliliters |
|2 Tablespoonful |1 Fluidounces |30 Milliliters |
|1 Tablespoonful |½ Fluidounces |15 Milliliters |
|1 Teaspoonful |1 Fluiddrachm |5 Milliliters |
|½ Teaspoonful |½ Fluiddrachm |2.5 Milliliters |
STEP 4: Key Points (10 minutes)
vaccines and vitamins
on the concentration or potency of the substance and therefore varies
from substance to substance depending on what is being measured
measures used at home when the metric units of measure are not
available.
by British Empire and it is seldom m used now days
system, is the internationally recognized decimal system of weights
and measures and is now widely used internationally
STEP 5: Evaluation (15minutes)
STEP 6: Take Home Assignment (10 minutes)
|Activity: Take home Assignment (10 minutes) |
| |
|ASK each individual student to do the following assignment |
| |
| |
|medication? |
|Two gallons is equivalent to how many liters? |
|Ten pounds is equivalent to how many kilograms? |
| |
|ALLOCATE time for students to do the assignment and submit |
| |
|REFER students to recommended references |
References
Ansel, H. C & Stocklosa, M. J. (2001). Pharmaceutical Calculations (11th
ed.). Philadelphia, United States: LIPPINCOTT WILLIAMS & WILKINS
Ansel, H. C (2010) Pharmaceutical Calculations (13rd ed.). Philadelphia,
United States: LIPPINCOTT WILLIAMS & WILKINS
Senya, S. S, Mwasha, C.Y, Muyinga, A. M, Amiri,R. I. and Mauga E.A.S.K.
(2011) Tanzania Pharmaceutical Handbook (2nd ed.). Dar eS Salaam,
Tanzania: School of Pharmaceutical Sciences.
New Jersey: John Wiley & Sons, Inc
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