RELISTOR: Rooted in Compassion

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University of Chicago pharmacologist Leon Goldberg

The RELISTOR story begins over 40 years ago, when University of Chicago pharmacologist Leon Goldberg decided he could no longer bear to see his dying friend suffer from opioid-induced constipation.

Fueled by compassion, Goldberg shifted his research to developing a drug that was designed not to interfere with the pain-relieving effects of opioids. He experimented with derivatives of naltrexone, an already well-established drug, to finally invent methylnaltrexone in 1979. This drug was designed not to interfere with morphine’s effect on pain, which is centered in the brain, but it did help block morphine’s constipating effects on the bowels.

The results of Goldberg’s efforts drew the attention of several of his university colleagues who continue to investigate methylnaltrexone.

RELISTOR® (methylnaltrexone bromide) 150mg tablet bottle

RELISTOR® is for adult patients with opioid-induced constipation (OIC) and chronic non-cancer pain.