Hi Kaitlyn and MomtoGiuliana,
Thanks very much for your helpful replies. I haven't tried any other medicinal type electrolyte drinks but I had noticed in passing in the past that I tended to feel unwell after drinking sports electrolyte drinks or fruit juice or eating a lot of fruit , so that made me wonder if potassium is the reason. I don't think I have ever had blood tests for potassium etc. but I have had a few tests that showed minor kidney problems, so I will ask my doctor about it. I will look into some other rehydration drinks as well and check the additives in case it is something to do with them, Thanks again,
Ger