Impact of Intravenous Naltrexone on Intravenous Morphine-Induced High, Drug Liking, and Euphoric Effects in Experienced, Nondependent Male Opioid Users

Abstract

Results in this study population suggest that naltrexone added to morphine in the 4% ratio within MS-sNT mitigates the high, euphoria, and drug liking of morphine alone, potentially reducing the attractiveness for product tampering. Assessment of the true clinical significance of these findings will require further study.