It will work via appetite suppression and stimulant/thermo effects, but like everyone stated it IS highly addictive. I was prescribed it and I got hooked on the first month. Luckily I have a monthly script, but it sucks when you run out a few days early....really sucks. I basically get narcolepsy and feel like a mindless drone. Taking it consistently regulates your dopamine and adrenaline and keeps them slightly elevated hence the enhanced mood effects, but when you stop taking it...it takes a while to get those happy juices flowing again.