WHY IT MATTERS: Patients and clinicians hoping for a targeted pharmacological tool to manage THC overconsumption or cannabis use disorder may face longer timelines before any such option becomes available. CLINICAL OVERVIEW: AEF0117 is a first-in-class CB1 receptor signaling inhibitor developed by Aelis Farma, designed to selectively block certain downstream effects of THC without fully antagonizing the receptor, representing a novel pharmacological approach to cannabis use disorder and THC-related adverse effects. The withdrawal of a THC interaction trial is a meaningful setback because interaction studies are critical for characterizing how AEF0117 behaves in the presence of active THC, which is the precise clinical scenario the drug is meant to address.