Salahuddin Mohammed, Ph.D. is an Assistant Professor of Pharmacology at Notre Dame of Maryland University. Dr. Mohammed's research focuses on polysubstance use, the concurrent use of multiple substances. Polysubstance use complicates treatment and often leads to poor outcomes. His solution includes a wearable sensor that uses real-time data to prioritize the substance causing the most harm and create a dynamic feedback loop that immediately rewards positive behaviors, enhancing treatment adherence and outcomes. This innovative approach is set to transform treatment for opioid and methamphetamine use disorders, especially in underserved communities.