MDPV for Sale Online at Bisman Chemical at the Best Prices Stimulants in the central nervous system are used to treat ADHD, narcolepsy, and weight loss aids by increasing brain activity to speed up mental and physical processes. The drugs for depressants of the Central Nervous System (CNS) slow brain function to treat several disorders efficiently. While the intensity, addictive capacity, and other aspects of MDPV differ considerably, they tend to be very chemically similar, and usually have similar effects.