I have a history of abnormal reactions to medication, I got the scary rash when I was on Lamictal, trazodone made me incredibly awake (I was prescribed it for sleep), and when I was on Zoloft I couldn't pee. I'm still surprised I had no toxic symptoms. I DID have a little bit on nausea, looking back, but not nearly what I'd expect for a toxic level. On the exact same dose my level was right smack in the middle of the therapeutic range back in November. I don't know what changed.