I'm 73 year old widow. The doctor diagnosed potassium depletion. I informed him I did no work was was bedridden with fibromyalgia and take potassium as to depletion and cardiac arrest in 2005. Still he insisted without tests and prescribed the following: Nitrofurantion Monohyd 100 total 20 one per day. Hydro/Diphe/Nysta 's 3 daily a pink oval tablet with C on one side 10 on other. I had NO PAIN at time But now have tremendous liver pain cannot walk w/o assistance. All in pelvic area. Headaches nausea and diarrhea. Please help.