I was in hospital for 16 days - no food no water - had flagyl and...

I was in hospital for 16 days - no food no water - had flagyl and levaquin in IV form - i had pancreatitis - my gall bladder is fine - they did every test imaginable to me and gave no reason for the sudden flare-up of pancreatitis - i do not drink at all - my hubby is 27 years into his recovery = the meds made me feel really weird - like my tongue was dissolving like alka seltzer - my tongue was coated totally green- i kept vomiting and feeling so exhausted but i could not sleep - how can they fda approve drugs like this?