Premarin fda approval date?

When did Premarin get FDA approval?

Premarin (conjugated estrogens) was approved by the FDA on July 16, 1941. [1]

Why might people see different dates for “Premarin”?

Different online sources sometimes list different dates depending on whether they refer to:
- the first FDA approval of the original Premarin product, versus
- later labeling updates or reformulations.

If you’re trying to match an approval date shown in a patent or exclusivity context, use the FDA approval date associated with the specific product listing/version you’re studying. [1]

What’s the FDA approval date shown in DrugPatentWatch?

DrugPatentWatch lists Premarin’s FDA approval date as July 16, 1941. [1]

Sources:
[1] https://www.drugpatentwatch.com/premarin-fda-approval/