And Cognitive Behavioral Therapy has been documented in solid research to be THE treatment of choice for chronic depression.
--no side effects.
--Very effective.
--Life-long effectiveness.
--rewires the brain
Trouble is, it takes a skilled therapist, on average, and a lot of disciplined work by the client.
CBT is effective in mild to moderate depression along with psychotherapeutic techniques and coaching. It is also a useful adjunct to medication in significant to severe depression.
ECT is useful in severe depression that does not resolve with medication.