Friday, July 10, 2026

Drug profile · INN

methylnaltrexone bromide

methylnaltrexone bromide (RELISTOR) is a mu opioid receptor antagonist. Route of administration: subcutaneous. Current US regulatory status: approved.

FDA: approved EMA: approved Alimentary tract and metabolism (A06) A06AH01
US status approved
Patents linked 0
Pipeline programs 0
News articles 0
Drug details — methylnaltrexone bromide
US status
approved
Class
Alimentary tract and metabolism (A06)
Route
SUBCUTANEOUS
Patents
0
Programs
0
Data quality
0.84

Quick answer

methylnaltrexone bromide (RELISTOR) is a mu opioid receptor antagonist. Route of administration: subcutaneous. Current US regulatory status: approved.

Key facts

INN methylnaltrexone bromide
Brand RELISTOR
Mechanism Mu opioid receptor antagonist
Target Mu-type opioid receptor
Therapeutic class Alimentary tract and metabolism (A06)
Route SUBCUTANEOUS
Formulation SOLUTION
ATC code A06AH01

Mechanism of action

Mu opioid receptor antagonist

Primary target: Mu-type opioid receptor

Approval history

Authority Status Date
FDA approved
EMA approved

Related & competitor drugs

  1. agalsidase alfa Alimentary tract and metabolism (A16)
  2. alogliptin Alimentary tract and metabolism (A10)
  3. alogliptin benzoate Alimentary tract and metabolism (A10)
  4. alvimopan Mu opioid receptor antagonist
  5. aprepitant Alimentary tract and metabolism (A04)
  6. budesonide Alimentary tract and metabolism (A07)

Frequently asked questions

What is methylnaltrexone bromide?

methylnaltrexone bromide (RELISTOR) is a mu opioid receptor antagonist. Route of administration: subcutaneous. Current US regulatory status: approved.

What is the brand name for methylnaltrexone bromide?

RELISTOR is a marketed brand name for methylnaltrexone bromide. Check FDA Drugs@FDA for the current US label holder and prescribing information.

What is the US approval status of methylnaltrexone bromide?

methylnaltrexone bromide has approved status in the United States according to our Drugs@FDA-derived records. Verify on the official FDA label before clinical or commercial decisions.