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How To Calculate Days Of Supply

Days of Supply Formula:

\[ DS = \frac{TQ}{DD} \]

units
units/day

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1. What is Days of Supply Calculation?

Days of Supply calculation determines how long a medication will last based on the total quantity dispensed and the prescribed daily dosage. This is crucial for medication management and refill scheduling.

2. How Does the Calculator Work?

The calculator uses the Days of Supply formula:

\[ DS = \frac{TQ}{DD} \]

Where:

Explanation: The formula divides the total quantity of medication by the daily dosage to determine how many days the supply will last.

3. Importance of Days of Supply Calculation

Details: Accurate days of supply calculation is essential for proper medication adherence, preventing treatment gaps, optimizing refill schedules, and minimizing medication waste.

4. Using the Calculator

Tips: Enter the total quantity of medication in units and the prescribed daily dosage in units per day. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if the daily dose varies?
A: For variable dosing regimens, use the average daily dose or calculate based on the specific dosing schedule.

Q2: How do I handle PRN (as needed) medications?
A: For PRN medications, estimate the average daily usage based on past consumption patterns.

Q3: What units should I use?
A: Ensure consistent units for both total quantity and daily dose (e.g., both in mg, both in tablets, etc.).

Q4: How accurate is this calculation?
A: The calculation is mathematically precise but depends on the accuracy of the input values and consistent dosing.

Q5: Can this be used for liquid medications?
A: Yes, as long as the units are consistent (e.g., both in mL or both in mg).

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