Three years ago, I was on accutane for quite a while and my skin is still very prone to dryness. Any sort of acne medicine does a number on my skin, but sometimes I find it necessary to apply some BP to whatever breakout I get. This helps clear the acne, but I also get very dry. My skin will crack, burn, and peel. My doctor recommended that I take fish oil capsules whenever I am extremely dry. I have some that contain vitamin E in addition to the fish oil. They really help cut down the dryness. You just can't take them for too long, because I've found that they can give you a rather "fishy" smell. Some of my other friends have experienced this as well. They help smooth out my skin and I think they help speed the healing process of my pimples as well.

Maybe you could give them a try. They're not very expensive and they're usually available in big jars (which is more cost effective) at any local drugstore. I hope it works for you!