Ciprofloxacin
"Everyone reacts differently to medications. For me, Cipro is always a fast acting antibiotic. I've only taken it a few times for severe UTI's/kidney infections, and it helped tremendously within the first few days. With the amount of pain I've gotten from UTI's, I'd be willing to risk the crazy side effects that some people have had. I rarely take antibiotics unless I have to. This one will treat just about anything and I've only experienced a few minor side effects like nausea, dizziness, agitation, headache, fatigue, and stomach upset. Nothing too crazy."