DESCRIPTION. LEVAQUIN ® Tablets are synthetic antibacterial agents for oral administration. Chemically, levofloxacin, a chiral fluorinated carboxyquinolone, is the pure (-)-(S)-enantiomer of the racemic drug substance ofloxacin. Hey MSers and Limbolanders, I just got over a bad UTI that has taken four antibiotics to eradicate!! One of the antibiotics (the 3rd one) was Cipro (which I had actually requested because I had read that it was so good for urinary tract infections). I took Levaquin 500 mg x 2 days and almost immediately started having leg/calf cramps and swelling. My doctor d/c'd the drug, and 3 weeks later I still having relentless calf cramps. This may help. I had terrible leg cramps in one leg off and on for a year. I'd wake up in the middle of the night and leap out of bed with pain stretching my achilles tendon for minutes until the excruciating pain would subside. Doctors give unbiased, trusted information on whether Amoxicillin can cause or treat Toothache: Dr. Davantzis on how long does it take for amoxicillin to work for tooth infection: It generally will take 24 -48 hours for an antibiotic to take effect. It is important for you to know that no antibiotic will not cure an abscessed tooth. You need. Take a course of antibiotics. UTIs are bacterial infections, and as such, doctor prescribed antibiotics are the most thorough, most recommended treatment to consider. Rated Levaquin for Sinusitis Report. I echo those who are telling you NOT to take this drug. I was in great health before being prescribed this poison. A recently developed extended-release formulation of ciprofloxacin (Cipro XR) provides higher maximum plasma concentrations than the conventional formulation. Here is where we lay out everything you need to know about UTI antibiotics. If you’ve ever googled questions like… Should I take Amoxicillin for UTI? Levaquin is the brand name for levofloxacin, a prescription antibiotic used to treat a variety of bacterial infections.