<unk>  is a CNS Stimulant that is FDA approved for the treatment of attention deficit disorder with hyperactivity and exogenous obesity. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include hypertension, increased heart rate.
Methamphetamine
Benzidine
Benzphetamine
Amphetamine
Benzocaine 
Cannabis 
Nicotine 
Nicotine