1. What is Days Supply Calculation?

Days Supply calculation determines how long a medication will last based on the total quantity dispensed and the prescribed daily dosage. It's essential for pharmacy inventory management and patient medication adherence.

2. How Does the Calculator Work?

The calculator uses the days supply formula:

Where:

• \( \text{Total Quantity} \) — Total amount of medication dispensed (units)
• \( \text{Daily Dose} \) — Amount of medication taken per day (units/day)

Explanation: This simple division calculates the number of days the medication supply will last based on the prescribed daily usage.

3. Importance of Days Supply Calculation

Details: Accurate days supply calculation ensures proper medication management, prevents early refills, helps with insurance billing, and supports patient adherence to treatment regimens.

4. Using the Calculator

Tips: Enter total quantity in units and daily dose in units per day. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What if the daily dose varies?
A: For variable dosing, calculate the average daily dose or use the maximum prescribed dose to ensure adequate supply.

Q2: How do I handle PRN (as needed) medications?
A: For PRN medications, estimate the average daily usage based on patient history or use a conservative estimate.

Q3: What about combination medications?
A: For combination products, calculate based on the total number of dosage units regardless of active ingredients.

Q4: How does this affect insurance coverage?
A: Insurance companies often have specific days supply limits and may deny early refills based on calculated days supply.

Q5: What if the result is a decimal?
A: Round to the nearest whole day or follow your pharmacy's specific rounding policies for medication dispensing.