Adderall
The two amphetamine enantiomers that compose Adderall ( levoamphetamine and dextroamphetamine ) alleviate the symptoms of ADHD and narcolepsy by increasing the activity of the neurotransmitters norepinephrine and dopamine in the brain , which results in part from their interactions with human trace amine-associated receptor 1 ( hTAAR1 ) and vesicular monoamine transporter 2 ( VMAT2 ) in neurons . 
<triplet> norepinephrine <subj> neurotransmitter <obj> instance of <triplet> dopamine <subj> neurotransmitter <obj> instance of