CVS Web Prescription Refill Reminder

WHAT IT DOES This tool monitors your CVS pharmacy prescriptions and helps you stay on top of refills. It extracts prescription data including medication names, refill status, days until refill due, last fill dates, and prescription numbers from the page. The panel displays each prescription with color-coded urgency: green for not due, yellow for due soon, and red for overdue or due within 3 days. A summary shows total prescriptions and counts by urgency status. For prescriptions that are due or overdue, a "Refill Now" button appears that opens the CVS refill page with a single click. The script also sends desktop notifications when prescriptions are due within your user-defined reminder window. WHERE IT RUNS The script activates on CVS pharmacy pages (cvs.com), including prescription dashboards, medication lists, and refill management pages. It automatically detects prescription data using multiple extraction strategies that work across different CVS layouts. The panel appears as a draggable overlay that stays accessible as you browse your prescriptions. HOW TO USE Navigate to your CVS prescription page. The panel will appear showing all detected prescriptions with their refill urgency color-coded. Set the "Remind (days)" input to control how many days before a refill is due that you want to receive a notification (default 7 days). Set the "Refresh (s)" input to control how often the script checks for updates (default 60 seconds). The "Refill Now" button appears for prescriptions that are due soon or overdue — click it to open the CVS refill page in a new tab. The "Refresh" button manually updates the data, and "Export" copies all prescription data as JSON to your clipboard. Use "Reset Notifications" to clear the notification tracking flags and allow reminders to be sent again. THE TECHNICAL MECHANISM The script employs a multi-strategy DOM extraction approach for CVS's pharmacy interface. It first attempts structured selectors targeting known class names like .prescription-card and .rx-card, then falls back to heuristic detection of medication containers based on content patterns including medication names, dosage indicators (mg, tablet, capsule), and prescription-related keywords. Refill urgency is determined primarily by parsing the "days until refill" value from the page, with fallback to status text matching for overdue, due soon, or ready statuses. The urgency classification uses a threshold system: days