It is a problem that some drugs are available in one country but not another.
I am quite happy with the Flecainide now. It has not suppressed all of the myotonic symptoms, I still have to be careful to avoid trips, cramps, etc., and I still get occassional bouts of vertigo.
I think that without this drug I would have really struggled to get through my last bout of surgery so I reckon that I will be using it for many years to come yet.