Anxiety sufferers often experience varying degrees of depression.  Why?  For several reasons.

1.    Anxiety prevents people from participating in a lot of activities.  As a result, the person feels like life is a struggle or that they "have no life."  That is depressing.

2.    Anxiety and depression often go together.  They just do.  Some people are just predisposed to both.  This doesn't make the prognosis any worse.  It just means that both have to be addressed.  There's hope!  Depression treatment is very effective, particularly with Cognitive and Behavior Therapies.

3.    Think about it.  Anxiety sufferers tend to think of themselves in depreciated terms.  Such self-downing leads to feelings of depression.

4.    Anxiety sufferers tend to think of themselves as helpless in terms of dealing with their anxiety, specifically, and with their lives, in general.  Helpless notions are depressogenic.

5.    Anxiety sufferers tend to think of their futures as hopeless.  Again, such thoughts are depressogenic.

6.    Panic sufferers, particularly, tend to think that they are going to die.  That is certainly depressing.

Symptoms of Depression (as described in the DSM IV):