My doctor just put me on Effexor for my insomnia - we're not sure if my anxiety is causing my insomnia or if the insomnia is ramping up my anxiety. I haven't been able to sleep through the night for almost 7 months and I'm desperate. I saw a natural product on Amazon that has the highest satisfaction rating I've ever seen on there. Problem is, it contains 5-HTP (25mg). I've been reading that you shouldn't mix the 2 of them due to serotonin syndrome, but I'm wondering how much would cause that. Right now, I've just started taking Effexor (37.5mg to increase in a week to 75mg). Like I said, I am desperate to get some sleep.