Sorry to hear you are having so much trouble with your potassium. My daughter has a kidney disorder and due to her medication we have to watch her levels. Did you have your potassium levels tested and they were too low? Did you try keeping your levels up with diet before needing the pills? My daughter is on Thalitone and so far we have been able to keep her level up with diet, (a banana a day) I'm not sure if this is an option for you? Please let your doctor know you aren't feeling well with the pill.
I hope you feel better soon!