"While being diagnosed with depression can be overwhelming, the condition is usually treatable with psychotherapy, medication or a combination of both," says this article for WeightWatchers.com. 

Dr. Dave discusses the links between depression and weight gain, and also how medication can complicate matters, including how selective serotonin reuptake inhibitors (SSRIs) like  Zoloft, Prozac, and Paxil, can cause some people to pack on pounds, up to 7% or more of their body weight.

Also on the examining table? Lexapro (can "cause patients’ weight to slowly creep up by a half pound to a pound per month over 6 to 12 months or more") and Celexa. What's more?

"Older tricyclic antidepressants (TCAs) such as Pamelor, Elavil, and Doxepin, and monoamine oxidase inhibitors (MAOIs) such as Parnate and Nardil are also associated with greater weight gain than SSRIs. 

Additionally, Dr. Edelson has seen patients who are taking agents such as Abilify, Zyprexa and Risperdal, atypical antipsychotics that are being added to antidepressant therapy, rapidly put on pounds."

“If you encounter weight gain while taking an antidepressant you should discuss the issue with your psychiatrist,” says Dr. Edelson, adding that mental health should be addressed before weight problems."