A modern web application for calculating Beyond Use Dates (BUDs) in pharmaceutical compounding based on USP guidelines.

The BUD Calculator is a tool designed for pharmacists and pharmacy technicians to quickly determine appropriate beyond-use dates for compounded preparations. It follows USP <795> and <797> guidelines for non-sterile and sterile preparations, respectively.

• Intuitive Date Selection: Easy-to-use date picker with quick date options (Today, Yesterday, Last Week, Last Month)
• Multiple Calculation Methods:
  • Standard USP guideline-based calculations
  • Custom day calculations for special cases
• Comprehensive Preparation Categories:
  • Non-sterile solid preparations
  • Non-sterile liquid preparations
  • Sterile preparations
• Storage Condition Options:
  • Room temperature (20-25°C)
  • Refrigerated (2-8°C)
  • Frozen (-25 to -10°C)
• Detailed Results:
  • Clear display of preparation and beyond-use dates
  • Explanatory notes citing relevant USP guidelines
• Responsive Design: Works seamlessly on desktop and mobile devices
• Dark/Light Mode: Choose your preferred theme

• Node.js 18.0.0 or higher
• npm or yarn

1. Clone the repository:

   git clone https://github.com/yourusername/bud-calculator.git
   cd bud-calculator

2. Install dependencies:

   npm install
   # or
   yarn install

3. Run the development server:

   npm run dev
   # or
   yarn dev

4. Open http://localhost:3000 in your browser to see the application.

1. Select Preparation Date:

   • Use the date input field to select when the preparation was compounded
   • Alternatively, use the quick date buttons (Today, Yesterday, etc.)

2. Choose Calculation Method:

   • Standard USP Guidelines: Uses official USP <795> and <797> guidelines
   • Custom Days: Allows you to specify a custom number of days

3. For Standard Calculations:

   • Select the appropriate preparation category
   • Choose the storage condition

4. For Custom Calculations:

   • Enter the desired number of days or use preset buttons

5. Calculate:

   • Click the "Calculate Beyond Use Date" button to generate results

6. Review Results:

   • The calculated beyond-use date will be displayed
   • Notes explaining the calculation basis are provided

This application is built with:

• Next.js: React framework for server-rendered applications
• TypeScript: For type safety and better developer experience
• Tailwind CSS: For responsive, utility-first styling
• Shadcn UI: Component library for consistent design
• date-fns: Modern JavaScript date utility library

The calculator follows the United States Pharmacopeia (USP) guidelines:

• USP <795>: For non-sterile pharmaceutical compounding
• USP <797>: For sterile pharmaceutical compounding

These guidelines provide standards for determining beyond-use dates based on preparation type, storage conditions, and other factors.

Important Note: This calculator provides general guidance based on USP standards. Always refer to current USP guidelines, consider the stability of specific ingredients, and use professional judgment when assigning BUDs.

This tool is provided for informational purposes only. The calculated beyond-use dates are based on general guidelines and may not account for all factors that could affect the stability or safety of a specific compounded preparation. Professional judgment should always be exercised when determining appropriate beyond-use dates.

A project by Eric Treacy

MIT License