Australian CASA are actually pretty good about dealing with pilots who are being treated for mental health issues. As long as you are stable and continue treatment they can usually get flying again within a reasonable amount of time.
FAA will make jump through endless hoops which will take at least 12 months to complete and then you may get your medical back. This is why I think the USA and many other countries have big problems with non disclosure. Apart from a few western nation's I believe flying on any type of anti depressant or anxiety medication is forbidden.
I would much rather fly with someone who got help than keeps it hidden.