I have been on Lexapro for over 15 years and I feel it is no longer helping me at all with my Anxiety and Depression. How should I cross taper this. I already started on Effexor at 37.5 mg and I am going to double that starting tomorrow. I am doing this while still on 20 mg of Lexapro.Should I split the 20 mg Lexapro in half as I up my Effexor? Will I still feel withdrawals by going on half the dose of Lexapro? So far the Effexor has not been helping my Anxiety and I have been taking Valium as needed for my panic attacks. I know that benzos can be a nightmarish cycle but I have been off of it for a month at a time. I also have Buspar that I would like to add but with all of these together I am worried about serotonin syndrome so I am holding off.