i, too had the head zaps with lexapro. they happened when i stopped taking it and also if i missed a dose. i thought i was the only one who had them and i could never really describe them to anyone else. they sucked though. i also gained about 15-20 lbs on lexapro but i'm not sure if it was related to the meds. when i was on lexapro it kinda made me a sociopath...i didn't really care about anyone or anything. it didn't make me happy or unhappy...just made me not care about anything. i almost ruined my relationship. honestly i never really felt like i needed medication. so i was on it for about a year and one day just decided to stop taking it...not the best idea cuz the withdrawal symptoms were pretty bad. in addition to the head zaps, i had migraines and walked around in a fog for awhile. i was also super cranky bc i stopped taking the Pill at the same time so some of the side effects could have been hormone-related. needless to say i was kind of a mess for a few weeks afterward. but i'm fine now.