Add fentanyl to the list!
Acute semaglutide blocks cue-, drug-, and stress-induced fentanyl seeking in rats, with drug- and stress-induced reinstatement dropping to the floor at every dose, and cue-induced seeking down about 70% at the higher doses.
I've run a lot of reinstatement studies. Usually a treatment decreases only one or two of the three triggers of relapse (cue, drug, stress), and the effect sizes are modest. Hitting all three this hard is very unusual.
That strength is the headline and the caveat at the same time. When something works this cleanly on everything, you want to rule out a non-specific effect. The latency and sucrose data help, but it would be important to replicate.
If it is true, it fits a bigger idea: GLP-1 acting as a master regulator of motivation that doesn't care whether the trigger is a cue, the drug, or stress, or even the type of reward (natural, food, alcohol, nicotine, drugs, etc…). How about behavioral forms craving in gambling, OCD, tics?
@PennStHershey
doi.org/10.1097/FBP.00000000…