hey i probablly should have asked before i ordered but i started takin the generic 37.5mg phentermine pills and was wondering if this drug was just used for an appetite suppressant or if it also maybe sped up your metabolism or "burned of fat" just curious i already started taking them and the first day they seemed speedy but it's been 4 days and i can't really notice and i usually don't eat until late in the day anyway?