Alexis - benzac gel is available over the counter, you don't need a script. It's available in 3 strengths - 2.5%, 5%, and 10% (of benzoyl peroxide, which is the main ingredient).

Benzoyl peroxide is also the main ingredient in the range of Proactiv products.

I used the 2.5% as I had used Proactiv before I used the benzac gel but I hated Proactiv because my skin got really irritated and it used to sting so badly. I think the BP in Proactiv may have been too strong for my skin. So I when I started to use the benzac gel, I started on the 2.5% strength.

I've since stopped using the gel a few weeks ago and my skin's looking good - not as good as it was pre-baby but the red marks are not a bright red colour anymore but have since faded to a dull brown. I don't have to wear foundation anymore - YAY!!