Phentermine is a prescription-only weight loss medication. It contains the active ingredient phentermine HCl, which is considered a controlled substance. The intended effects of phentermine are appetite suppression and energy enhancement, but most users also experience at least one side effect.
Phen Caps are an all-natural weight loss supplement. They are available online and without a prescription because they do not contain phentermine HCl (or any other controlled substance). They help suppress appetite and boost energy, and do not cause any adverse side effects.