None of the pills work. Some are even so dangerous, they can kill. There is no way to loose weight fast
. The faster you loose weight, the faster and the more will be back on your hips.
The only way to loose weight effectively is to do it slow, and to make changes to your diet for life.
There are several approaches to do this, my favourite is: think of how much you are willing to change. Make your own short term goals, which are achievable, like 3 kgs lost by the first monday next month.