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The Drug Abuse Warning Network has reported that the prescription opioid pain-killers oxycodone and hydrocodone are associated with more than 200,000 emergency-room visits per year. Since 1999, more than 165,000 people have died from prescription opioid overdoses, according to the U.S. Department of Health and Human Services. To help prevent opioid-related fatalities, public health officials and practitioners have turned to naloxone, a drug that can be injected right after an overdose to reverse or block the opioid’s effects. But naloxone — and someone trained to administer it — need to be on hand. Kim D. Janda and colleagues wanted to devise a prophylactic approach to counter opioid-related deaths.
The researchers developed two compounds as potential vaccine candidates. They work by preventing opioids from entering the central nervous system, where the molecules induce their addictive euphoric and pain-relieving effects. Testing showed that oxycodone and hydrocodone remained in the bloodstream of mice given the vaccines, suggesting that the medicine effectively blocked the opioids from migrating into the central nervous system. Additionally, mice who received the vaccines survived oxycodone and hydrocodone overdoses at higher rates than unvaccinated mice.
The authors acknowledge funding from the National Institute on Drug Abuse.
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