Para-Bromoamphetamine

"para"-Bromoamphetamine (PBA), also known as 4-bromoamphetamine (4-BA), is an amphetamine derivative which acts as a serotonin-norepinephrine-dopamine releasing agent (SNDRA) and produces stimulant effects.
Neurotoxicity.
Like most other "para"-substituted amphetamines, PBA can be neurotoxic and may deplete the brain of 5-hydroxyindoles for at least a week.