What is the best cream that can be bought without a prescription that can whiten/bleach dark leg scars fast?

Mederma Cream (Mostly used for strech marks %26amp; C-Section scars) BUT will work to remove scars...|||Go to a dermatologist, and ask for a cream that contains 4% hydroquinone(?). However, I think its by prescription only, and depending on how dark the spots are, it will take at least a month to lighten.