The opioid antagonist naltrexone can prevent heroin from having its normal effect in part because it has a greater affinity for opioid receptors in the brain.

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Naltrexone is an opioid antagonist that works by binding to the opioid receptors in the brain with a higher affinity than opioids like heroin, thereby preventing heroin from exerting its effects.

The Opioid Antagonist Naltrexone Can Prevent Heroin from Having Its