I have suffered with anxiety and depression and obsessional thoughts and insomnia for 20+ years. I have been hospitalised once. I am currently taking venlafaxine it was 225mg This worked for me for years with diazepam when needed. Have recently been suffering again badly and psych has put my venlafaxine to 300mg and now has given me 2.5mg of olanzapine to help with sleep and racing thoughts... Due to my anxiety I am terrified of taking it incase I am like a zombie or have nightmares and I'm scared of weight gain... any positive comments would be greatly appreciated.