Rigel expands deal with Kissei to include Rezlidhia

3 September 2024

US biotech Rigel Pharmaceutical’s (Nasdaq: RIGL) shares dipped 4.4% to $12 .85 by late morning, despite announcing what could be a lucrative deal for the company

Rigal has entered into an exclusive license and supply agreement with Japan’s Kissei Pharmaceutical (TYO: 4547) to develop and commercialize Rezlidhia (olutasidenib) in all current and potential indications in Japan, the Republic of Korea and Taiwan.

Rezlidhia is commercially available to patients in the USA for the treatment of relapsed or refractory (R/R) mutated isocitrate dehydrogenase-1 (mIDH1) acute myeloid leukemia (AML). Rigel has an existing agreement with Kisseito develop and commercialize Tavalisse (fostamatinib disodium hexahydrate) for the treatment of chronic immune thrombocytopenia (ITP) and in all other potential indications in Japan, China, Taiwan and the Republic of Korea.

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