Thanks for replies- I had tracked down the US supplier but thought there might be a slim chance that someone here might actually have found a UK source for- and used- the transdermal stuff. The real problem with adding the tabs to food is that I'm trying at the same time to introduce a low-iodine diet, for the hyperthyroid state that we assume caused the high BP. Having to worry about whether or not she's eaten all the small portion with a tablet in it (yes, the 1/4 tab dose) before I offer the main course is an added stress for both of us. Ah well- I'm about to try pill pockets, and hope I can get the gel eventually.