Pete...20 mgs is the highest recommended dose for Lexapro so please don't bump up your dosage on your own without speaking to your doctor first. The therapeutic affect of these class of drugs is limited...meaning they work for a certain amount of time then you have to increase the dose to get the same relief. I am really shocked your doctor has you on the highest dose in six weeks time...
Everyone's brain chemistry is different and it can take trial and error to find something that works. I could not tolerate any drug in this class...some see improvement in a week or two. I hope you find something that works for you.
Donna