Hi Ben,
This is a great question because, as I'm sure you know, unless a product specifies that it's gluten free you can never be too sure if it is or not. They do contain a lot of glucose, which may have been derived from wheat so it's definitely better to be safe than sorry.
The best thing to do would be to call them directly and ask their customer service reps. In Australia, the phone # is 1800 226 766 and in New Zealand, it's 0508 731 234.
If you're still unsure, all Halls products are now gluten free as well as Cepacol products
www.myshopping.com.au/PT--219_Pharmaceuticals_Lozenges__fs_11084_e__?Find=cepacolFor future reference, here's a very helpful link that lists all kinds of gluten free pharmaceuticals. It's sure to help with any questions that may arise regarding medications and/or over-the-counter treatments.
homepage.mac.com/sholland/celiac/GFmedlist.pdfGood luck!
