"i just started this medication after using lexapro for 18 months and it quit working. my doctors office had some samples of brintellix and switched me over. since i started this medication i have been so sleepy i can&#039;t get off the couch. my mood/depression is much better but i can&#039;t stand being tired all the time. i will give it another week, and if it does not get better i will call my doctor."