Norfloxacin expired 1 month can not be eaten. Norfloxacin is a quinolone antibacterial drug, mainly for the treatment of urinary tract infections and intestinal infections, expired 1 month of norfloxacin can not be eaten, because of its reduced efficacy, the adverse effects may increase, will cause gastrointestinal and hepatic and renal function damage. 1. Most of the drugs after the shelf life will naturally reduce the efficacy, safety will be reduced, or even no efficacy, can not play the role of anti-infection, delay the condition. 2. In general, expired norfloxacin will not cause much adverse reaction, but there may be an increase in toxic side effects. 3. 1 month expired norfloxacin may cause gastrointestinal damage, liver and kidney function damage. If you feel unwell after taking expired Norfloxacin, it is recommended to consult a doctor in time and treat the cause under the guidance of a specialist.