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Methylnaltrexone Bromide

Sold as RELISTOR · given by oral, subcutaneous

Three to five years until it comes off patent
4.6 yr
Until anyone may copy it
Protection runs to 2031-03-10
2
Trials running now
59 registered in total
In routine use
Furthest stage reached
already in routine clinical use
3
Organisations running trials
lead sponsors on record
01

Who owns it, and until when

Salix Pharmaceuticals Inc
Approval holder
the only company permitted to sell it today
2031-03
Last patent expires
latest patent filed against this product
none listed
FDA exclusivity ends
a separate protection granted at approval

Whichever date falls later is when other manufacturers may apply to sell copies. Price typically falls steeply within a year of that point, and with it any company's ability to recover the cost of new research on the molecule. That is when it becomes a candidate for the ledger on the first tab.

02

What it is being tested for

ConstipationOpioid-Induced ConstipationOpioid-induced Constipation
03

Who is paying for the research

Bausch Health Americas, Inc.
Company
34
M.D. Anderson Cancer Center
University or hospital
2
Region Örebro County
University or hospital
2

Who funds the trials matters after protection lapses. Company-funded work usually stops once exclusivity ends; university, hospital and government-funded work does not, and is the research most likely to continue on this molecule afterwards.

04

The trials themselves

NCT06162377In routine use2024 · 25 people · recruiting now
Methylnatrexone In Resectable Head and Neck

Expiry dates are what the patent holder has filed; litigation, paediatric extensions and settlements routinely move them, so read these as the earliest plausible date rather than a schedule. Not medical advice.

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