in dosage relate to a drug's weight or volume. These are the most common measures in dosage.
The International System of Unites (SI) was adapted from the metric system in 1960. Most countries except the US have adopted SI nomenclature to provide a standard language of measurement.
Differences between metric and SI systems do not occur in dosage.
The meaning & abbreviations for weight & volume are the same
- Weight measures are based on the gram
- Volume measures are based on the liter
aka: gm or Gm
Metric abbreviation for weight: Gram
One gram is approximately equal to the weight of two paper clips.
Metric abbreviation for weight: Kilogram
One kilogram equals 2.2 pounds
Metric abbreviation for liquid measure: Liter
One liter is a little more than a quart
Metric abbreviation for weight: Microgram
One thousand micrograms make up 1 milligram
1000 mcg = 1mg
Metric abbreviation for weight: Milliequivalent
No equivalent necessary. Drugs are prepared and ordered in this weight measure.
Metric abbreviation for weight: Milligram
One thousand milligrams make up 1 gram:
1000mg = 1g
Metric abbreviation for liquid measure: Milliliter
The terms cubic centimeter (cc) and mililiter (mL) are interchangeable in dosage
1cc = 1mL
Metric abbreviation: Unit
This is a measure of biologic activity, so nurses do not calculate measure.
Ex: penicillin potassium 300,000 units
(but don't use U for this abbreviation, it's safer to write it out because a lot of times the U was read as a zero)
*Self Test 4 - Page 36
Abbreviations for Metric