Dosage Calculations: Capsules and Tablets Using the Desired Over Have Method

Introduction

• Instructor: Sarah from registerednessrn.com
• Focus: Solving capsule and tablet dosage calculations using the Desired Over Have method.
• Additional Resources: Access the free quiz related to this content after watching the video.

Desired Over Have Method

• Purpose: Solve for the number of tablets to administer per dose.
• Alternative Methods:
  • Ratio Proportion
  • Dimensional Analysis

Example Problems

Problem 1

• Scenario: Physician orders 2 mg by mouth daily, supplied with 1 mg tablets.
• Solution Process:
  • Desired dose (D): 2 mg
  • Have dose (H): 1 mg
  • Quantity: 1 tablet
  • Formula: ( \frac{D}{H} \times \text{Quantity} = x )
  • Calculation: ( \frac{2}{1} \times 1 = 2 )
  • Result: Administer 2 tablets per dose.

Problem 2

• Scenario: Physician orders 0.5 mg by mouth daily, supplied with 125 mcg per tablet.
• Solution Process:
  • Desired dose (D): 0.5 mg
  • Have dose (H): 125 mcg
  • Conversion: 0.5 mg = 500 mcg (using metric table)
  • Formula: ( \frac{500 \text{ mcg}}{125 \text{ mcg}} \times 1 \text{ tablet} = x )
  • Calculation: ( \frac{500}{125} \times 1 = 4 )
  • Result: Administer 4 tablets per dose.

Problem 3

• Scenario: Physician orders 750 mcg by mouth daily, supplied with 0.25 mg per tablet.
• Solution Process:
  • Desired dose (D): 750 mcg
  • Have dose (H): 0.25 mg
  • Conversion: 750 mcg = 0.75 mg (using metric table)
  • Formula: ( \frac{0.75 \text{ mg}}{0.25 \text{ mg}} \times 1 \text{ tablet} = x )
  • Calculation: ( \frac{0.75}{0.25} \times 1 = 3 )
  • Result: Administer 3 tablets per dose.

Problem 4

• Scenario: Physician orders 25 mg twice a day (bid), supplied with 50 mg tablets.
• Solution Process:
  • Desired dose (D) per dose: 25 mg
  • Have dose (H): 50 mg
  • Quantity: 1 tablet
  • Formula: ( \frac{D}{H} \times \text{Quantity} = x )
  • Calculation: ( \frac{25}{50} \times 1 = 0.5 )
  • Result per dose: 0.5 tablets
  • Total Daily Dose: 0.5 tablets per dose ( \times 2 \text{ doses/day} = 1 \text{ tablet per day} )

Conclusion

• Wrap-Up: The video demonstrated solving tablet and capsule calculations using the desired over have method.
• Further Learning: More videos in the series are available through the link in the video description.