It is basically Phen/Phen, without the second Phen, Phenteremine is the amphetemine portion of the old weight loss cocktail, you will sometimes see it prescribed with Prozac now, or similar mood stabilizers, it's just prescribed speed, it is a controlled substance, not something you get over the counter, it comes in pill or capsule, brand name is the pill, lots of generics in the capsules, good stuff, but just watch it, had a bro start taking upwards of 115 mgs a day, and he started having heart issues after a few months, as with everything like that, watch your blood pressure and all those good things.