oh gosh i'm going through the exact same thing. bumped up lexapro from ten to twenty just a few days ago. been on ten for about a year. i have been getting increasingly agro, but i thought that was just me cause i have a temper, lol.
i've been mad all day at work today. WOW, GEEZ! i'm so glad i came here! i've also felt a little hyper. but it's been useful not a downside at all. oh this is useful to know. no one told me this!