I went to see a new psychiatrist a few weeks back who suggested I changed from my 200 mg sertaline + 1mg risperidone to venlafaxine. He wrote out the schedule of how my sertraline dosage would decrease each week , when to start venlafaxine & when to increase the dosage of that.

The first few days down to 150mg of sertraline I was really irritable, but managed the rest of the week pretty much ok, the week of 100mg & 50mg passed by reasonably smoothly (for someone with anxiety & depression), even though at 50mg of sertraline I was to start at 37.5mg of venlafaxine. It's these last 2 days that are proving increasingly horrendous - ever since completely stopping all sertraline & upping the venlafaxine dosage to 75mg. I'm not sure if it's the venlafaxine or sertraline withdrawal, but I seriously do not feel good. My head hurts, I feel really nauseous, it feels like time keeps speeding up & slowing down and I feel really jittery & on edge.

Has anyone been through similar? If so, roughly how long does it last?