Here's a good article about what to look for in pills for acne.
There's so many choices out there and people just assume the claims on the bottle. If the ingredients are not natural or you don't understand what is in them, pass on it. An acne sufferer can start with a vitamin regimen and get their nutritional needs in order to be sure that your dietary intake is not the root cause of the acne before going to the dermatologist. This is a great way to approach the problem.
If acne has already scarred you're skin, try some natural ways to remove acne scars too.