My mother s BP has been out of control lately. she was in the hospital for 24 hours this past Monday. Tests came back normal for her age (100 in October 11, 2016). They sent her home. She has been complaining about severe back pain about where the Kidneys are. I told her PCP about it and she has put her on SMZ/TMP DS 800-160 Tab. In reading the literature accompanying the drug I read Signs of high Potassium level like a heartbeat that does not feel normal; change in thinking clearly and with logic; feeling weak, lightheaded, or dizzy; feel like passing out, numbness or tingling; or shortness of breath. Muscle or joint pain. Purple patches on the skin or mouth. I was stunned. She has all these symptoms. I don t know if I should take her to the ER and if so, can it wait until morning given the fact that she took the first of this new medicine tonight. Also, she has been in the hospital 4 times in the past year and each time (not this time though) they have said her potassium was low. So stupid me started giving her potassium supplements. I am now so worried I can t sleep. God help me if I kill her this way. Please tell me what to do and when.