MDPV

MDPV (3,4-methylenedioxypyrovalerone) is a synthetic stimulant of the cathinone class, chemically related to the natural stimulant in the khat plant. It was originally synthesized in the 1960s and later reappeared on the recreational market around 2010 as one of the main ingredients in products sold as "bath salts," often labeled "not for human consumption" to evade regulation. It typically comes as a white or tan powder and is swallowed, snorted, or injected. MDPV was central to a sharp rise in synthetic-cathinone poisonings in the United States in 2010-2011.

MDPV is a norepinephrine-dopamine reuptake inhibitor (NDRI): it blocks the transporters that normally clear dopamine and norepinephrine from the synapse, causing these signals to build up. It is highly selective for the dopamine transporter (roughly 6-8 times more active at dopamine than norepinephrine) and essentially inactive at serotonin. This makes it pharmacologically cocaine-like in mechanism but far more potent — one of the most powerful dopamine-reuptake inhibitors studied. Importantly, MDPV works as a pure blocker, unlike mephedrone and methylone, which are releasers that actively push monoamines out of neurons. That strong, selective dopamine action helps explain both its intense stimulant effect and its high potential for compulsive use.

MDPV produces powerful stimulant effects compared to cocaine, amphetamine, or methylphenidate: intense euphoria, alertness, wakefulness, and raised heart rate and blood pressure. Typical doses are small (single-digit milligrams), but a strong tendency to redose can push total intake much higher. The main psychological effects last a few hours, with lingering stimulation afterward. Because the drug so strongly favors dopamine, its effects skew toward raw stimulation and compulsion rather than the warmth or empathy associated with MDMA-like cathinones.

MDPV is associated with some of the most severe toxicity in the cathinone family. High doses or binges can cause intense, prolonged panic attacks, severe agitation, paranoia, hallucinations, and stimulant psychosis, along with dangerous cardiovascular effects — very high heart rate and blood pressure, chest pain, and overheating. Cases of agitated delirium requiring emergency care have been reported. The drug's potency and the small effective dose make accidental overdose easy, especially since powders sold as "bath salts" vary widely in content. Risk rises further with redosing, injection, sleep deprivation, and combination with other stimulants or depressants. Repeated use carries a real risk of dependence.