So, please take a good quality probiotic after antibiotic use. Some will need to take this for a long time others just a few weeks. Probiotics are non-toxic and you can not over-dose or become toxic from them. Keep some in your refrigerator at all times. Living cultured foods commercially available include some brands of kefir, yogurt, miso, sauerkraut and a pickled Chinese cabbage called kimchee which promote lactic acid in the gut are excellent foods for gut health.
Short courses of antibiotics can leave normal gut bacteria harbouring antibiotic resistance genes for up to 2 years. This increases the chances of resistance genes being surrendered to pathogenic bacteria, aiding their survival and suggesting that the long-term effects of antibiotic therapy are more significant than previously thought. http://www.sciencedaily.com/releases/2010/11/101101083144.htm (Image: http://www.foodrenegade.com/how-recover-gut-health-after-antibiotics/)