I have not taken Lexapro, but I have taken other SSRIs (
Prozac, Effexor and Cymbalta). All
of them caused the brain zaps. Effexor was the worst offender, and I tapered it ridiculously slowly, and the problem hung on for a very long time. At least I found out it was a withdrawal problem by them - after stopping Prozac I had the brain zaps and suspected I was getting multiple sclerosis or something.