Took one tablet of cipro for uti. It worked very well. Symptoms got disappeared immediately. But due to it's dangerous side effects. I missed a dose next day. And then I switched to amoxicillin (in the morning day after tomorrow. Already took 1 tablet and it hasn't start working yet. So can I switch back to cipro? Or continue taking amoxicillin? Because I am afraid that bacteria does not get resisted to cipro because I took it for once.