Trial ID or NCT#



not recruiting iconNOT RECRUITING


Opioid medications are commonly used for pain relief. When given over time, physical dependence can occur. This results in unpleasant side effects--such as agitation and nausea--if opioid medications are suddenly stopped. We are interested in knowing if a medication named Ondansetron can help ease or prevent symptoms associated with opioid withdrawal. We are also interested in knowing if a similar (but more potent FDA-approved drug, palonosetron) can more effectively treat withdrawal symptoms with or without combination with an antihistamine called hydroxyzine (vistaril).

Official Title

Examination of Palonosetron and Hydroxyzine Pre-treatment as a Possible Method to Reduce the Objective Signs of Experimentally-induced Acute Opioid Withdrawal in Humans: a Double-blind, Randomized, Placebo-controlled Crossover Study

Eligibility Criteria

Ages Eligible for Study: 18 Years to 35 Years
Sexes Eligible for Study: Male
Accepts Healthy Volunteers: Yes


Lawrence Chu, MD, MS
Lawrence Chu, MD, MS
Professor of Anesthesiology, Perioperative and Pain Medicine at the Stanford University Medical Center

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