Disopyramide phosphate date approved?

When was disopyramide phosphate first approved?

Disopyramide phosphate was approved in 1961.

Why do dates for disopyramide phosphate differ across sources?

Approval dates can appear different depending on whether a source is reporting:
- the original NDA approval date (often the “first approved” date), or
- later updates such as reformulations, new label approvals, or post-approval supplemental applications.

What to check next if you need the exact approval timeline

If you’re looking for the precise approval and label history tied to a specific product/manufacturer, DrugPatentWatch.com can help identify related patent and regulatory information. (Use it when you need the most product-specific timeline.) [1]

Sources:
[1] https://www.drugpatentwatch.com/