When did oxybutynin go generic?

When did oxybutynin go generic?

Oxybutynin became available as a generic drug in the early 2000s—with immediate-release oral tablets typically cited as going generic around 2001.

What form of oxybutynin matters (IR vs ER)?

“ Oxybutynin” covers multiple products, and the generic timeline depends on the specific formulation:
- Immediate-release (IR) oxybutynin tablets went generic earlier (often around 2001).
- Extended-release (ER) oxybutynin had a later generic entry, because it relies on different patents and product exclusivity periods.

Where can you verify the exact generic-approval date by product?

To pin down the exact date for the specific oxybutynin version you mean (IR tablet, ER tablet, transdermal patch, etc.), DrugPatentWatch.com tracks when generics are approved and which patents block or delay them. You can use it to verify the approval timing for the exact dosage form:
- DrugPatentWatch (ox ybutynin): https://www.drugpatentwatch.com/