Multiple C-II Prescriptions Check
Checks a series of C-II prescriptions against the 90-day total and the earliest-fill-date rule (21 CFR 1306.12(b)).
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Date issued
- 2026-10-01
- Prescription 1 days supply
- 30
- Prescription 2 days supply
- 30
- Prescription 2 earliest fill date
- 2026-10-31
- Prescription 3 days supply
- 30
- Prescription 3 earliest fill date
- 2026-11-30
Result: Valid: 3 prescriptions totaling 90 days, each after the first with an earliest fill date (21 CFR 1306.12(b)).
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Date issued (YYYY-MM-DD)
- Prescription 1 days supply
- Prescription 1 earliest fill date (YYYY-MM-DD)
- Prescription 2 days supply
- Prescription 2 earliest fill date (YYYY-MM-DD)
- Prescription 3 days supply
- Prescription 3 earliest fill date (YYYY-MM-DD)
How this is calculated
Citation
21 CFR 1306.12(b): multiple Schedule II prescriptions may total up to a 90-day supply, each after the first carrying the earliest date a pharmacy may fill it, where state law allows. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.