Agent	Mechanism	DEA schedule	Side effects
Phendimetrazine	Noradrenergic	III	Palpitations, tachycardia, insomnia, hypertension, dry mouth, constipation
Benzphetamine	Noradrenergic	III	Same as phendimetrazine
Diethylpropion	Noradrenergic	IV	Same as phendimetrazine
Phentermine	Noradrenergic	IV	Same as phendimetrazine
Sibutramine	Noradrenergic and serotonergic	IV	Hypertension, tachycardia, headache, insomnia, dry mouth, constipation
Orlistat	Gastrointestinal lipase inhibitor	Unscheduled	Loose stools, increased defecation, oily discharge, fecal urgency, deficiency of fat-soluble vitamins