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Questions and Answers
What is the total quantity of Glycerin required to prepare 1000 mL of the solution in Example 1?
What is the total quantity of Glycerin required to prepare 1000 mL of the solution in Example 1?
- 10 g
- 20 g (correct)
- 16 g
- 200 g
What is the total quantity of Polyvinyl Alcohol required to prepare a dozen 30-mL containers of artificial tears in Example 3?
What is the total quantity of Polyvinyl Alcohol required to prepare a dozen 30-mL containers of artificial tears in Example 3?
- 0.14 g
- 1.4 g
- 16.8 g (correct)
- 30 g
What is the percentage of Sterile Sodium Chloride Solution in the artificial tears formula in Example 3?
What is the percentage of Sterile Sodium Chloride Solution in the artificial tears formula in Example 3?
- 90%
- 1%
- 10%
- 9% (correct)
What is the total quantity of Zinc Oxide required to make 1000 g of the ointment in Example 5?
What is the total quantity of Zinc Oxide required to make 1000 g of the ointment in Example 5?
What is the proportion of Hydrophilic Ointment in the ointment formula in Example 5?
What is the proportion of Hydrophilic Ointment in the ointment formula in Example 5?
What method is used to calculate the quantity of each ingredient required to make 1000 g of the ointment in Example 5?
What method is used to calculate the quantity of each ingredient required to make 1000 g of the ointment in Example 5?
What is the main objective of reducing or enlarging pharmaceutical formulas?
What is the main objective of reducing or enlarging pharmaceutical formulas?
Which of the following methods is used to reduce or enlarge formulas?
Which of the following methods is used to reduce or enlarge formulas?
What is the purpose of calculating the factor in reducing or enlarging formulas?
What is the purpose of calculating the factor in reducing or enlarging formulas?
If the value of the factor is greater than 1, what does it represent?
If the value of the factor is greater than 1, what does it represent?
What is the term used when the value of the factor is less than 1?
What is the term used when the value of the factor is less than 1?
What is the formula to calculate the factor in reducing or enlarging formulas?
What is the formula to calculate the factor in reducing or enlarging formulas?
What is the purpose of the example provided in the lecture?
What is the purpose of the example provided in the lecture?
What is the unit of the quantity calculated in the example?
What is the unit of the quantity calculated in the example?
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Study Notes
Reducing and Enlarging Formulas
- Reducing or enlarging pharmaceutical preparations involve changing quantities while maintaining the same ratio and concentrations.
Calculating the Factor Method
- This method involves calculating a factor to multiply each ingredient's quantity to obtain the desired formula.
- Factor = Quantity of desired formula / Quantity of given formula
- If the factor is > 1, it's an Enlarging Factor (EF); if < 1, it's a Reducing Factor (RF).
Examples
- Example 2: Calculating quantities for calamine lotion preparation using the factor method.
- Example 3: Calculating quantities for artificial tears preparation using the factor method.
Proportional Method
- This method involves using ratios to calculate ingredient quantities.
Examples
- Example 5: Calculating quantities for ointment preparation using the proportional method.
- Total number of parts (by weight) = sum of individual parts; used to calculate quantities for a desired total weight.
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