Inverted poses can help push through and lessen depression when added to a daily routine. The shoulder stand and the bridge pose are both great ways to send fresh blood, glucose, and oxygen to the brain. This initiates the creation of Serotonin and Dopamine. These chemicals have been found to increase with regular yoga practice, especially the inverted poses.
What do you have to lose? Nothing, so give it a try. Get those legs up in the air and feel your depression drift away.