Senator Elizabeth Warren criticized the Food and Drug Administration chief for failure to limit antibiotics to cows, sheep, pigs, chickens, turkeys etc. These animals, often crowded into filthy factory farms, develop copious diseases. Both the diseases and the antibiotic resistance they build up are passed to humans eating their flesh.
Others focus on the 140,000 visits to the emergency room each year in the US... visits caused by severe reactions to antibiotics.
The drugs.com link lists major classes of antibiotics of which some are listed below,
as well as the several subclasses and toxic side effects.
http://www.drugs.com/article/antibiotic-sideeffects-allergies-reactions.html
Quinolones perhaps the most dangerous of all.. Cipro is among these
Penicillins
Cephalosporins
Aminoglycosides
Carbapenems
Glycopeptides
Macrolides
Sulfonamides
Tetracyclines
Antituberculosis agents
Quinolones
http://well.blogs.nytimes.com/2012/09/10/popular-antibiotics-may-carry-serious-side-effects/?_php=true&_type=blogs&_r=0
http://articles.mercola.com/sites/articles/archive/2012/10/20/fluoroquinolones-side-effects.aspx
http://www.forbes.com/sites/melaniehaiken/2012/09/30/antibiotic-alert-the-drug-the-doctor-ordered-could-cause-deadly-side-effects/
