Can a patent drug fail?2 Nov 2025 16:39
Taken from Google:
"YES, a patented drug can and often does fail. A patent grants the owner the right to exclude others from making, using, or selling the invention for a limited time (typically 20 years from the filing date), but it is not a guarantee of the drug's safety, efficacy, or commercial success.
Drug failure can occur at various stages of its lifecycle for several reasons:
During the Development Phase
The vast majority of patented drug candidates fail during clinical trials. The overall success rate from Phase 1 through to regulatory approval is only around 10.5%, with a failure rate of approximately 90% for drugs entering clinical studies."
Good luck to all.