Why does Lyrica cause anxiety, depression and even suicidal thoughts in some people? I was first put on Neurontin, which sent me into this black hole of depression, then they put me on Lyrica and I still was severely depressed. Now I'm taking antidepressants together with the Lyrica and it seems to help. Does Lyrica deplete one of serotonin or is it something else playing a role here? Thank you.