Hey there,
I stumbled across your question and thought I should let you know my experiences. Firstly just making sure the
Lexapro your taking is an anti-depressant, if it is then I used to be on it but quickly changed as I suffered many side effects to it. Extreme nausia, unbelieable lack of sex drive, migranes the list goes on. I didnt get a stiff jaw but that could be linked to the migranes I had. Anyway I was referred to 'Lovan' and have not had any side effects whatsoever, its brilliant. See if you can give that a go.
Hope that helps
: )