Refill Calculator

Our refill calculator uses your prescription's fill date and days supply to determine your next refill date. It follows standard pharmacy guidelines and can be used for all types of medications, including controlled substances. You can also select specific pharmacies like CVS or Walgreens to get accurate refill policies.

Yes, our calculator works for controlled substances and automatically adjusts refill windows based on stricter regulations. For controlled substances, early refill windows are typically limited to 2 days before the next fill date. The calculator also provides pharmacy-specific guidelines for controlled substance refills.

Early refill policies vary by pharmacy. CVS typically allows refills 2 days early for controlled substances and 3-5 days for regular medications. Walgreens usually permits refills 3 days early for regular medications and 2 days for controlled substances. Always verify specific policies with your local pharmacy.

Days supply is calculated by dividing the total quantity of medication by your daily dose. For example, if you have 60 pills and take 2 per day, your days supply is 30 days. Our calculator can help you track this and even save your medication details for future calculations.

For most medications, request your refill 3-5 days before you run out. For controlled substances, pharmacies typically allow refills after you've used 75-80% of your current supply. Use our calculator to determine the exact date based on your specific medication and pharmacy.