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MEASUREMENT SYSTEMS

There are different systems of measurement used in Pharmacy

QuestionAnswer
What are the different systems of measurement used in Pharmacy? Metric, English, Apothecary, and Avoirdupois
Metric System The majoy systems of weights and measures used in medicine. It was developed in France in the late 18th century and is based on a decimal system.
Decimal System different measurement units are related by measures of 10
METRIC (Liquids) Liquids (including lotions) are measured by volume. The most widley used metric volume measurements are litersor milliliters
METRIC (Solids) Solids (pills, granules, ointments, ets) are measured by weight
METRIC (Milliliters) are sometime referred to as cubic centimeters (CC). They are not precisely the same but quite close and are sometimes used interchangeably. Militer is the preferred usage for pharmacy.
To convert milligrams to grams, move the decimal 3 places to the left (1mg =0.001g)
Conversions the change of one unit of measure into another so that both amounts are equal.
Avoirdupois (av-er-duh-poiz)System is the system of weight (ounces and pounds)that we commonly use. However, one Avoirdupois unit used in pharmacy is rarely used elsewhere. It is the GRAIN
The GRAIN is the same weight in several different measurement systems: Apothecary, Avoirdupois, and Troy. On the metric scale, one grain equals 64.9 milligrams. However, this is often rounded to 65 milligrams.
Apothecary (uh-poth-uh-ker-ee) is sometimes used in prescriptions, primarily with liquids. It includes the fluid ounce, pint, quart, and gallon.
Household Units the teaspoon and tablespoon are common household measurement units that are regularly used in liquid prescriptions. NOte that home teaspoons and tablespoons are not accurate for use in measuring medications.
Temperature The Centigrade scale, which is also called Celsius, is used to measure temperature.
Created by: izeno
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