Is that the one where the big print says guaranteed and
the small print says results not typical?  That means they
are not guaranteeing you will lose weight.

If they don't say results not typical in the fine print,
they are probably in violation of FTC regulations.

Notice that they also says see a doctor before starting any
weight loss program.  What did your doctor say?

The pills probably also come with an enclosed exercise and
reduced calorie program and the pamphlet probably says it
only works if you follow that program.  

Save your money and buy a pair of cross trainers.  Then
start an exercise program.  And see your doctor for a
referral to a registered dietitian or state-licensed
nutritionist to help you eat right.