When an Antibiotic Can Behave Like a Neurotoxin in Some Patients: Fluoroquinolones, GABA, Mitochondria and the Brain fq100.org For some people who take fluoroquinolone antibiotics, a short course of treatment is followed by a pattern of symptoms that goes far beyond what most of us imagine when we hear the words “side effects”. Weeks or months after a “normal” course of tablets or even eye or ear drops, they begin to feel as if their nervous system is slowly falling apart. They report burning ne