NeilMed have denied the possibility of any reaction to Sodium Chloride in NeilMed but since then I have taken Potassium Chloride, prescribed by a doctor, I ony took half the dose precribed but had the start of the same reaction . I stopped taking it at once. It's impossible to get to see a doctor in a reasonable time after starting the reaction so I don't know what I can do. I definitely do have a reaction and I still have some of the problems remaining which the first reaction caused. I still maintain that I had that reaction and will tell anyone who's interested about it. User's recommendation: Since one can't know what they're allergic to unless they first have the reaction = I don't know the answer to this.