Copyright 2013 wolters kluwer health lippincott

Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
Other Systems Other Systems
•
Avoirdupois System
–
Older system
–
Ounces and grains
•
Other Systems
–
Measures may reflect chemical activity or biological
equivalence
•
Unit
•
Milliequivalents
•
International units

Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
Other Systems (cont.)

Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
Question
Question
Tell whether the following statement is true or false.
The avoirdupois system is a system of measurement that
uses ounces and grains.

Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
Answer
Answer
True
Rationale: The avoirdupois system is another older system
that was very popular when pharmacists routinely had to
compound medications on their own. This system uses
ounces and grains, but they measure differently than
those of the apothecary and household systems. The
avoirdupois system is seldom used by prescribers, but
may be used for bulk medications that come directly from
the manufacturer.

Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
amount of drug available amount of drug prescribed
one tablet or capsule # of tablets or capsules
=
to give
Conversion Between Systems
Conversion Between Systems
amount of drug available amount of drug prescribed
volume available volume to admini
=
ster

Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
Solving for X
Solving for X
amount of drug available amount of drug prescribed
one tablet or capsule # of tablets or capsules
=
to give
=
10 mg 40 mg
x
1