Jen I think they are not very thoughtful about sugar free stuff here. I had to have some liquid medication for oral thrush a while ago, I went to 3 chemists, Boots and independent one and Manor Pharmacy which is also a chain I think, with the prescription and none of them could find the sugar free version on their systems, they did not think it was made any more.
So 4 times a day I had to have this sugary stuff, it can't have been good for my teeth let alone my blood sugar levels.
And I would imagine people with diabetes are the main group of people who get oral thrush, so you'd expect a sugar free version.
It tasted really foul though, so possibly it would have been unbearable if it was sugar free.