Lithium
"I have major depression and borderline personality traits (Dialectical behavioral therapy (DBT) has helped), and chronic suicidal thoughts for over 30 years. I am on Mirtazapine 30mg, Bupropion XL 300mg for over two years. Because of my suicidal thoughts my Dr put me on lithium three weeks ago. She started with 300mg then went up to 600mg. They only bad side affect for me was a very dry mouth. After 2 weeks of being on it it started feeling wonderful! And it helped my suicidal thoughts tremendously. I felt so much better and have more energy ! Then she decided to bump me up to 900mg per day. The only side effect I feel is, I feel like there is pressure on my brain. I'm hoping this is going to go away like my dry mouth. I also am not sleeping well either."