Under terms of the deal, Stoke will spearhead global development of zorevunersen, while Biogen will receive exclusive rights to commercialize the treatment outside of North America.

Biogen (NASDAQ:BIIB) and Stoke Therapeutics (NASDAQ:STOK) said on Tuesday they are collaborating to develop and commercialize zorevunersen, an investigational treatment for Dravet syndrome, in territories outside the United States,

Biogen has entered a collaboration with Stoke Therapeutics to develop and and commercialise zorevunersen to treat Dravet syndrome in all territories outside Canada, Mexico and the US. Dravet syndrome is a genetic developmental and epileptic encephalopathy characterised by cognitive and behavioural impairments and recurrent seizures.

Biogen and Stoke Therapeutics have signed a deal to co-develop and sell Stoke’s experimental drug for Dravet syndrome, outside the U.S.

Stoke Therapeutics Inc. and Biogen Inc. said Tuesday they are entering a collaboration to develop and commercialize a treatment for Dravet syndrome, a severe form of epilepsy that starts in childhood.

Biogen has bolstered its pipeline by licensing ex-US rights to a drug for Dravet syndrome – a rare form of epilepsy – from Stoke Therapeutics in a deal that included an upfront payment of $165 million.

In exchange for $165 million, Biogen now has access to zorevunersen, a potential first-of-its-kind treatment for Dravet syndrome.

Stoke Therapeutics Inc. (Nasdaq: STOK) has pulled in Biogen (Nasdaq: BIIB) to help it develop and commercialize a treatment it’s working on for Dravet syndrome, a rare, debilitating form of epilepsy that affects children.