I use GSF syrup foil sachets (obtained on prescription) as i loathe dextrose tablets, as above. Dry and horrid. BUt also Gluco juice - pricey but tastes nice, twice as fast as tablets and 100 times more palatable. Quick too - especially if you need a lot, and what is more, you seem to need less than with tablets, each little bottle is 15 g carbs.