4-MPD (4-Methylphenyl-2-pyrrolidin-1-ylpentan-1-one) is a synthetic stimulant belonging to the cathinone class. It acts as a norepinephrine-dopamine reuptake inhibitor (NDRI), producing effects such as increased energy, focus, and euphoria. Marketed as a “research chemical,” it is often sold in crystal form. Key Features: Stimulant properties similar to other cathinones Potential for recreational use due to psychoactive effects Not approved for human consumption (sold for “research purposes” only) Possible risks: cardiovascular strain, addiction, and legal consequences Note: The safety profile of 4-MPD is not well-studied, and its legal status varies by country. Use may carry significant health and legal risks.