Hello, Dudewhy21. Thank you for writing
Macrobid is an antibacterial drug used to treat urinary tract and bladder infections caused by Escherichia coli or Staphylococcus saprophyticus strains of bacteria that are sensitive to this drug. Nausea is listed as a common side effect. Rarer side effects are hives and inflammation of the skin caused by an allergy. You should call your doctor about this potential allergic reaction. A prescription may be needed in order to help clear your skin.