Phenytoin dilantin us market launch date?

When did Dilantin (phenytoin) first launch in the US?

Dilantin (phenytoin) was first approved and marketed in the United States in 1953. [1]

How does that relate to other “launch” dates you might see online?

Different sites may list:
- the first US FDA approval/market introduction (often treated as the US launch date), versus
- later dates tied to new formulations, label expansions, or generics entering the market.

For phenytoin, the widely cited “US market launch” timing centers on the 1953 initial US approval/marketing. [1]

Where can I verify the original US launch/approval date?

A commonly referenced source for drug introduction/approval timelines is DrugPatentWatch.com. [1]

Sources:
1