Naltrexone implants after in-patient treatment for opioid dependence: randomised controlled trial

Naltrexone is a medication which blocks the effects of heroin and other opiate-type drugs. Its considerable potential in helping to prevent post-detoxification relapse has not been realised because patients generally refuse to take it or quickly discontinue.

However, these limitations apply to the oral formulation which has be taken daily. Longer-lasting formulations in the form of a depot injection or an implant inserted under the skin avoid the need to take the medication daily. This is the first randomised trial of an implant whose opiate-blocking effects last for about six months.

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