There are several routes that you can take. An alternative to Herceptin is: Tykerb. I know there are several trials presently underway in Croatia and other places in Europe. Go to
www.clinicaltrials.gov and search there.
If you Mom were to come to the US, Genentech has a SPOC program where they will give your Mom Herceptin either free or at a greatly reduced cost.
Herceptin must be refrigerated and carefully mixed, so it is doubtful if you could purchase it here and ship it to Europe.
Warmest Regards
Joe