Diet pills or Supressants?

I tried hydroxycut about 8 years ago for several months and it worked. But then i tried it again 2 yrs later and it didn't seem to. Then my dr had me take a 3 month supply every day of Phentermine & that worked great, 2 yrs ago. But then when he gave me the same thing for one month last yr, and i decided to take it every other day instead it didn't work out as well. Does anyone know of any over the counter pills that may work?