I have been on Effexor for almost 8 months or so. I have experienced these brain shocks and hiar loss. I have lost about 50% of my hair. I thought it was from stress. I started looking last night to discover this med is doing it. I am in RN school and all the drug books I have looked in say nothing about it causing hair loss. I have not taken my med today and am going to try to not take it at all anymore.