I would never have guessed Corpus Christi would be up there (or Laredo or El Paso for that matter)! My guess is the antidepressant sales aren't there because folks who may use them pop across the border to purchase them much more cheaply. This is speculation on my part, at least partially, but alot of folks make the drive from this area down to Mexico to purchase other drugs, so it would stand to reason.
On the other hand, we're on the coast, it's usually bright and sunny and breezy, and the air is mostly clean, despite the presence of refineries. That's not so bad either I guess! I'd rather live here than either Laredo or El Paso, given the choice.