As far as consulting with a mental health professional - often when it comes to meds it depend what we're looking for, often levhavdil just like asking a Rav. The general mehalech is to use meds to stabilize, and then use therapy to cure; even if it's not a chemical issues, meds can be very useful because they buy breathing space before people , say, jump off of a cliff. There is a concept of a pure chemical issues, like another mental illness that has zero to do with one's state of mind - like manic-depressive, but like Uri said, even if it's not meds still have a roll.
You use all weapons in this battle.