Additional Drug measures:

1
Chapter 5

• Additional Drug measures
• Units
• Percentage
• Milliequivalents
• Ratio
• Apothecary
• Household

2
Units

• Measures the drug in terms of action
• Range from 5 units to 2,000,000 units
• No symbol for units
• Two hundred and fifty thousand units
• 250,000 units
• Twenty-five hundred units
• 2500 units

3
Percentage Measures

• Percentage means parts per hundred
• The higher the percentage strength, the stronger
  the solution or ointment
• 100 mL of a 1 solution will contain 1 g of drug
• 100 mL of a 2 solution will contain 2 g of drug

4
Percentage Measures Quiz

• True or False
• A 40 solution is stronger than a 30 solution.
• A 5 ointment is not as strong as a 2 ointment.
• 100 mL of a 3 solution will contain 30 grams of
  drug
• There is no space between a percentage strength
  and its symbol.

5
Percentage Measures Quiz

• A 40 solution is stronger than a 30 solution.
• 40 40 g and 30 30 g
• TRUE
• A 5 ointment is not as strong as a 2 ointment.
• 5 5 g 2 2 g
• False

6
Percentage Measures Quiz

• 4. 100 mL of a 3 solution will contain 30 grams
  of drug
• 3 3 g
• False
• 5. There is no space between a percentage
  strength and its symbol.
• 3 or 3
• 3
• True

7
Milliequivalent (mEq) Measures

• An expression of the number of grams of a drug
  contained in 1 mL of normal solution
• Who cares????
• Not you!
• What do I need to know?
• mEq milliequivalent

8
Ratio Measures

• Represent parts of drug per parts of solution
• 1 500
• 1 part drug to 500 parts solution
• 1 20
• 1 part drug to 20 parts solution
• A solution that is 1 part drug and 10 parts
  solution is written
• 1 10

9
Ratio Measures

• The less solution a drug is dissolved in, the
  stronger the solution.
• a Ratio of 15 is much stronger than 1100
• Ratios are always expressed in their simplest
  terms
• 2 8 wrong!
• 1 4

10
Small Group Quiz

• Express the solution strengths as ratios
• 1 part drug to 50 parts solution
• 5 parts drug to 20 parts solution

11
Small Group Quiz

• Identify the strongest solution
• 3. 1 50 1 500 1 5000
• 1 20 1 10 1 100
• 1 1000 1 4000 1 3000

12
Small Group Quiz

• Express the solution strengths as ratios
• 1 part drug to 50 parts solution
• 1 50
• 5 parts drug to 20 parts solution
• 5 20 ? express in simplest terms ?
• 1 4

13
Small Group Quiz

• Identify the strongest solution
• The less the solution the stronger the solution
• 1 50 1 500 1 5000
• 1 50
• 1 20 1 10 1 100
• 1 10
• 1 1000 1 4000 1 3000
• 1 1000

14
Apothecary Household Measures

• Obsolete
• Drop
• Symbol gtt (gtts drops)