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Hello and thank you for using JustAnswer. If you quit the Lexapro one week ago and you only took it for 2 days than the Lexapro has long washed out of your system by now and is not responsible for your “brain zaps.” Most likely you are experiencing underlying anxiety symptoms and I would recommend that you talk to your doctor about starting you on a low dose benzodiazepine to lessen and stop the brain zaps, than you and your doctor can go from there for a more long-term treatment plan.
Please let me know if you have any other questions or concerns as I would be happy to continue assisting you regarding this issue.