Wyeth Pharmaceuticals and fellow US firm Progenics have entered into an exclusive, worldwide agreement for the joint development and commercialization of methylnaltrexone for the treatment of opioid-induced side effects, including constipation and post-operative bowel dysfunction. Shares in Progenics rose 7% to $24.75 in pre-market trading on the day of the announcement, December 23.
Under the terms of the deal, Wyeth receives worldwide rights to MNTX, while Progenics retains an option to co-promote the product in the USA. The transaction includes an upfront payment of $60.0 million to Progenics with as much as an additional $356.5 million payable upon achievement of certain milestones. Wyeth will pay Progenics royalties on worldwide sales and co-promotion fees within the domestic market. The drug major is also responsible for all future development and commercialization costs.
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