What is adipex composed of?

Phentermine. Adipex is the brand name for phentermine. It's a stimulant. Watch out for: high blood pressure, fast heart rate, getting hooked on it.
Sympathomimetic. This medication is a sympathomimetic drug used to treat obesity. It's mechanism of action is unknown. It stimulates central nervous system activity. Should be used carefully and under the direction of a physician well versed in it's use and side effects and complications.