At the same time, systemic psoriasis drugs have more potential side effects.

One example of that involves the psoriasis drug Raptiva.

Raptiva, a psoriasis drug, is being beaten in the market by Enbrel from Amgen.

If you find yourself in a similar predicament, resources are available that can help make psoriasis drugs more affordable.

The manufacturers of biologics and other high-priced psoriasis drugs offer assistance programs that help patients cover the cost of treatment.

Next Page: Why are some psoriasis drugs so expensive?

The study was sponsored by Connetics, a maker of an older psoriasis drug.

The psoriasis drug, Onercept, was being tested in a Phase 3 trial.

It's unclear what's behind the rapid increase in the price of psoriasis drugs, says Dr. Wolverton.

Some analysts say a successful psoriasis drug could have annual sales of more than $1 billion.