Methodology
Formulary Signal exists to make the public-record monitoring workflow explainable: scheduled checks, watchlist matching, timestamped HTML Signal Card emails, and source context from public sources where matching records are available.
Formulary Signal monitors public FDA/openFDA shortage data. Signal Cards can attach related public context from FDA RSS, RxNorm, openFDA NDC, and DailyMed where available. ASHP/UUDIS remains external link/title/date context only; bulletin content is not copied, summarized, rewritten, or used for synthesized reports. Formulary Signal is not affiliated with the FDA.
Records are checked on a scheduled basis. Alerts are generated when matching watchlist terms appear, change, or resolve, depending on configured alert behavior. The service is not real-time.
Alerts include timestamp, FDA status, why the card appeared, context sources found, related public records, listed companies, public-record links, and matched public-source context so customers can verify against official public sources.
Signal Card reports may include source-bound pattern notes based on allowed public sources and Formulary Signal history. These notes are internal review context only, not predictions, causality claims, clinical advice, procurement guidance, or substitution guidance. ASHP/UUDIS bulletin content is excluded from pattern notes.
These notes are operational context for review, not predictions, causality claims, medical advice, procurement guidance, substitution guidance, or inventory advice.
Not every source produces related context for every watch term. When no related public context is found in a source, the Signal Card says so instead of implying a missing check failed.
Formulary Signal does not replace official sources. It does not provide clinical, procurement, inventory, sourcing, substitution, causality, or legal advice.