What are some of the traditional medications for moderate to severe psoriasis?
People with moderate to severe psoriasis often require drugs to suppress the immune system, such as cyclosporin and methotrexate. These medications can treat your psoriasis, but they're very nonspecific; they can affect many different organs in the body. Some can cause kidney damage, affect the liver-in some cases, even cause fibrosis and cirrhosis of the liver. They can be used safely in the context of a well-trained dermatologist's office, but there are clear risks to them.
What are biologic medications?
Biologic medications are proteins that are developed in a laboratory using genetic engineering. They can be directed specifically against molecules in the immune system that affect the cells that cause psoriasis. The medications target specific markers on the immune system, disrupts the processes in the immune system that cause psoriasis, but do not affect other organs in the body.
There are different biologics, and they each have different effects. Alefacept, the molecule that's recently been approved by the FDA for moderate to severe psoriasis, works by attacking the specific T-cells that are important for the psoriasis itself. It eliminates or decreases the number of cells that cause the disease.