I was given the generic of Macrobid. First day I experienced nausea, indigestion, gas and diarrhea. Severe headaches, dizziness and now started throwing up! I've been on it only 3 days, but I am throwing it away..I feel so horrible, and very weak, almost flu like. Terrible drug, don't take it. I am just praying I don't get the long-term side affects I've read here.