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There are many painkillers out there but morphine is just about the best one. The only problem with morphine, is that it's very addictive. Researchers from the University of Colorado and the University of Adelaide may have figured out a way to outsmart the dependency of drugs.

The discovery, could also find a way to get rid of addiction by blocking out the brain's Toll-like receptor 4 (TLR4), a portion of the immune system that binds with opioids to amplify chemical addiction with naloxone, a drug used to treat heroin overdose.

The drug keeps dopamine at bay when heroin is processed, staving of the rush of pleasure felt from the drug. When that good feeling is gone, there's much less of an incentive to use it. Researchers are expecting trials to begin within the next 18 months. [University of Adelaide via Geekosystem]