Common synthetic cathinones found in bath salts include 3,4-methylenedioxypyrovalerone (MDPV), mephedrone (“Drone,” “Meph,” or “Meow Meow”), and methylone, but there are many others. Much is still unknown about how these substances affect the human brain, and each one may have somewhat different properties. Chemically, they are similar to amphetamines (such as methamphetamine) as well as to MDMA (ecstasy).
The energizing and often agitating effects reported in people who have taken bath salts are consistent with other drugs like amphetamines and cocaine that raise the level of the neurotransmitter dopamine in brain circuits regulating reward and movement. A surge in dopamine in these circuits causes feelings of euphoria and increased activity. A similar surge of the transmitter norepinephrine can raise heart rate and blood pressure. Bath salts have been marketed as cheap substitutes for those stimulants. A recent study found that MDPV—the most common synthetic cathinone found in the blood and urine of patients admitted to emergency departments after bath salts ingestion—raises brain dopamine in the same manner as cocaine but is at least 10 times more potent.
The hallucinatory effects often reported in users of bath salts are consistent with other drugs such as MDMA or LSD that raise levels of another neurotransmitter, serotonin. A recent analysis of the effects in rats of mephedrone and methylone showed that these drugs raised levels of serotonin in a manner similar to MDMA.
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