I have had a bladder infection since the weekend and on Monday my GP prescribed Trimethropin but after taking it my symptoms worsened considerably. i got a really bad headache which didnt respond to any painkillers, I am aching all over, have had chills and night sweats. I felt so bad that I went back to Dr this morning. She thinks the symptoms are a sign that the infection might have travelled up to my kidneys and she has changed the antibiotic to Ciproflaxacin. I have read the leaflet and the side effects sound scary. I googled and found loads of reviews from people saying they have experienced lasting side effects from taking the drug - nerve damage, tendonitis, weakness. I am really worried about taking it. Just wondered if anyone had experience of taking it? Obviously I need to deal with this infection but don't feel like I want to take Ciprofloxacin. Should I call my GP and ask for an alternative?