Methylphenidate has the two dopamine transporter and norepinephrine transporter binding affinity, with the dextromethylphenidate enantiomers exhibiting a well known affinity for that norepinephrine transporter.[citation wanted] Equally the dextrorotary and levorotary enantiomers exhibited receptor affinity for the serotonergic 5HT1A and 5HT2B subty