Before you begin using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.
Discoloration of urine: This medication may turn your urine a rust yellow or brown colour. This is a normal effect of the medication and is not a cause for concern.
Overgrowth of organisms: The use of this medication may cause an overgrowth of microorganisms not killed by the medication, with results such as yeast infections and resistant bacteria.
Pregnancy: This medication should not be used during pregnancy unless the benefits outweigh the risks. Do not use this medication if you are in labour or expect to go into labour soon (i.e., you are close to your due date). If you become pregnant while taking this medication, contact your doctor immediately.
Breast-feeding: This medication passes into breast milk. If you are a breast-feeding mother and are taking nitrofurantoin, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.
Children: The safety and effectiveness of using this medication have not been established for children under one month of age.