Searching for the right diet pill

I've been telling that I wanted to lose weight and my search is not yet ended,I'm still on comparing which one is the right diet pill for me.I'm still searching for the right diet pill.Though there are many weight loss pills in the market not all are safe and effective.Aside from being safe,I want the product to have an active ingredient to control appetite,that gives more energy and increase metabolic rate to help burn calories in my body.But I have to ask first my doctor if it is safe for me to use this kind of product.