I had slight stomach upset...nausea...last night and got tired, but nothing extreme. This morning I'm feeling slight dizziness and lower back ache, but again...nothing extreme. I keep hoping for the best. I've read that these slight symptoms have a tendency to go away eventually. They are only short term for most people. I hope I'm most people. I experienced the lower backache before going on the Lexapro, so I'm pretty sure it's not the cause. I've had kidney stones in the past and it sort of feels like that...hope not. I don't need that to deal with right now, too. Also have a slight sore throat today....don't think that is the Lexapro either....just fighting a "bug" probably. It can never be just one thing. Ya know? When it rains it pours. Will take my second dose tonight.