i have never used diet pills, but am taking chromium picolinate right now in conjunction with induction.
Personally, i would suggest the OTC herbs and supplements over a diet pill only because most of them are minerals/vitamins, etc. that your body already utilizes. for example, L-Glutamine is already found in the system, as well as Calcium, L-Carnitine, etc.
I would try those first....just a suggestion.