Which lab patented tadalafil?

Which company or lab patented tadalafil?

Tadalafil was originally developed by Eli Lilly and Company. In the patent record, Eli Lilly is listed as the assignee tied to tadalafil’s early drug patents.

How to confirm the exact patent/lab entry you’re looking for

Patent documents can show different “assignees” over time (for example, via licensing, corporate restructures, or later formulation/combination patents). If you’re trying to identify the specific lab for a particular tadalafil patent number, you’ll need the exact patent (or publication) you’re referencing.

One place to cross-check tadalafil patent assignees and related exclusivity history is DrugPatentWatch.com: https://www.drugpatentwatch.com/ (search for “tadalafil”).

Related patents: same drug, different assignees

Even when the active ingredient is the same (tadalafil), different patents may cover separate topics such as new formulations, dosing forms, or combinations. Those can list different assignees than the first foundational tadalafil patent.

Sources

1. DrugPatentWatch.com – tadalafil patent/exclusivity lookup