I have had a diagnosis of Fibromyalgia for some 20 years. Two years ago I was hospitalised for a week through Accident and Emergency for stomach pains. I was put on intravenous Penicillin (Amoxicillin) and Metronyzadole. My Fibromyalgia disappeared. I couldn't quite take it in, and asked my GP what was going on. She didn't know. I had never had a complete remission before, despite numerous conventional and alternative therapies. I felt like I had before I'd become ill. This lasted for just under 3 months. Then the old symptoms started to return, though I tried to tell myself they weren't. Energy levels dipped again, and muscular aching and stiffness returned, along with a general malaise. In December 2011 I was given identical antibiotics at the same dosage for a severe gum infection following an extraction. The same thing happened; I simply became 'well'.I was astounded. Now, in the Middle of March 2012 my symptoms have started to return. My doctor has logged it again, but says that the underlying mechanism is unlikely to be identified in my life time. The first time it happened I asked to see a consultant at a major London hospital to discuss it. This happened, but no further light could be shed on what had taken place. Any similar experiences? By the way, I have been on other antibiotics (Doxycycline for example) for other things and nothing happened whatsoever.