... for the first week and then upped to 20mg the following week and thereafter. I've been on it a total of 3 weeks, 2 weeks at 20mg. I'm still having bouts of anxiety throughout the day, more so in the morning and I'm wondering if I need to go with the name brand of Lexapro instead of the generic. Has anyone had an experience with Lexapro and has it helped? ow long before the meds actually kicked in and you felt a real improvement in anxiety. Thanks for your input! Take care