Naltrexone implant reduces the craving for alcohol, it affecting the neural pathways in the brain where the neurotransmitter dopamine is found.
For poeople who are addicted to drugs, Naltrexone blocking the effects of drugs like heroin and cocaine in the brain.
Naltrexone is a long acting opioid antagonist. It works by blocking the opioid receptors in the brain and therefor blocks the effects of heroin and other opioids.