It's literally amphetamine minus the good parts of amphetamine.
If you're gonna fuck with illegal stimulants, at least do the good shit. Phentermine is garbage as well, as is phendimetrazine. I've done them all. Ask me anything. They do not affect the dopamine and serotonin transporters, they are primarily Norepinephrine based. Just in case some of you are a little slow, this basically means it will give you all the negative side effects of being tweaked with none of the fun stuff. Expect a horrible rise in BP, tachycardia out the wazoo, anxiety, and insomnia that won't budge without a hefty amount of gin. It is not worth it. Please leave these drugs for the fat, wine drinking netflix watching dog loving trash soccer moms they were intended for.
Bottom line is that these quasi-amphetamine schedule IV stimulants suck at everything. If you want to burn fat, there's plenty of avenues you can take like t3, clen, DNP, or you know, actual dieting and cardio. They suck even for recreational purposes too. I won't get too far into it since this is against board rules apparently, but amphetamine and methylphenidate are the only two prescription stimulants "worth" abusing.