Deadliest Antibiotics: Ciprofloxacion (cipro), gemifloxacin (factive), norfloxacin (noroxin), Levofloxacin (levaquin), moxifloxacin (avelox), and ofloxacin (floxin). [It's not a miracle of modern science if it has deadly side effects]
Flares can cause painful injury to your intestines. Antibiotics can be used to fight conditions like abscesses and fistulas (breaks in the intestinal wall). The two most commonly used antibiotics for Crohn's disease are Flagyl (metronidazole) and Cipro (ciprofloxacin).