From what I've read, 5HTP increases serotonin...great...but it can cause an imbalance with the other neurotransmitters, creating less dopamine if I remember right (my brain could be remembering wrong). If that balance is thrown off than you can get side effects. I'll try to find where I read it and post the link if I can find it again. It really was just a couple days ago. You might have to take the dose down or stop. Also definitely watch out for serotonin syndrome.