This phase I-II study is designed to evaluate oral tolerance and efficacy of a novel peripheral opioid antagonist, methylnaltrexone. This pharmacokinetics based study will allow us to obtain first ever information of oral dose methylnaltrexone in preventing opioid-induced changes in gastrointestinal motility and transit in healthy human volunteers. Methylnaltrexone was discovered by researchers at the University of Chicago.

Project Start
Project End
Budget Start
Budget End
Support Year
35
Fiscal Year
1996
Total Cost
Indirect Cost
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