New experimental painkiller is like stronger morphine without the addiction: The drug, called AT-121, targets the same opioid receptors in the brain but also latches on to nociception receptors, that block the brain’s addiction-forming response, in a primate study in Science Translational Medicine.

See the source article by following the link below:
New experimental painkiller is like stronger morphine without the addiction: The drug, called AT-121, targets the same opioid receptors in the brain but also latches on to nociception receptors, that block the brain’s addiction-forming response, in a primate study in Science Translational Medicine.