Flagyl can cause nausea and diarrhea. Many of the antibiotics do. C. diff also causes nausea and diarrhea, so it may be difficult to figure out.
Whenever you take an antibiotic of any sort, you should always eat Yogurt and drink Pro-biotics as antibiotics interfere with the normal flora in your stomach and that can cause nausea and diarrhoea.
Go to your nearest Chemist and get Pro-biotics.
All the best,
I'm a little down, I've had this bug before and had to take flagyl for it. I was a lot younger then and tuck it like candy with no issues. Now I couldn't tolerate one day of it. Also I am using a probiotic that's from the natural brand, lactobacillus and noticed its causing me bad gas and constipation. Any good probiotics that don't do this?
Remember the Yogurt tip and you can try Metamucil instead of pro biotics. Metamucil has an ingredient: physillium husk - that acts as the intestine/stomach broom