1.I see metronidazole is usually combined with norfloxacin but not Ciprofloxacin in oral preparations.& we usually give cipro & metro infusion together. I also see cipro usually combined with tinidazole . Is there any problem with giving cipro & metro together orally ?

I would also like to know if NSAIDs are being commonly given with quinolones without side effects like seizures. 2.Why beta-lactams can not be given with tetracyclines ?