Don Brill wrote: "Levofloxacin is effective against a number of gram-positive and gram-negative bacteria. Medications with a known history of reacting with Levaquin include cisapride, depridil, droperidol, methadone, pentamidine, theophylline, blood thinners like warfarin or Coumadin, oral diabetes medication, insulin, and aspirin. Taking Levofloxacin with an acidic beverage such as a cola drink may increase its absorption. Some medications will cause health effects and serious reactions when taken with Levaquin. Some medications will cause health effects and serious reactions when taken with Levaquin. Levofloxacin is offered in the market as the brand names Levaquin, Cravit, and Tavanic."