Story perspectives

Kyoto Researchers Develop Non-Addictive Painkiller Like Fentanyl

8/28/2025

24 4

Summary

Story summary

Researchers at Kyoto University have created a new painkiller that is as effective as fentanyl but without addiction risks.
After 13 years of research, phase one clinical trials were successful, with phase two trials commencing soon.
Professor Masatoshi Hagiwara plans larger trials in the US next year, aiming for commercial availability in two years.
The drug alleviates pain without side effects, enabling patients to remain conscious and avoid dependence.

1 of 1

Story summary

Researchers at Kyoto University have created a new painkiller that is as effective as fentanyl but without addiction risks.
After 13 years of research, phase one clinical trials were successful, with phase two trials commencing soon.
Professor Masatoshi Hagiwara plans larger trials in the US next year, aiming for commercial availability in two years.
The drug alleviates pain without side effects, enabling patients to remain conscious and avoid dependence.