Any form of dairy products, such as milk and yogurt or with juice as it may reduce the drug's effectiveness. If you take Cipro in spite of a history of hypersensitivity to ciprofloxacin or any member of the quinolone antimicrobial agents. Cipro is especially useful against hard-to-treat infections that affect the lungs, urinary tract, skin, bones and joints, and the urinary tract. Cipro is available as a tablet and an oral suspension. Like other antibiotics, Cipro works best when there is a constant amount in the blood and urine.