Before taking nitrofurantoin,
tell your doctor and pharmacist if you are allergic to nitrofurantoin, any othermedications, or any of the ingredients in nitrofurantoin capsules or syrup. Ask your doctor or pharmacist for a list of the ingredients.
tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements and herbal products you are taking or plan to take. Be sure to mention any of the following: antacids, antibiotics, benztropine (Cogentin), diphenhydramine (Benadryl), probenecid (Benemid), and trihexyphenidyl (Artane. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor if you have anemia, kidney disease, lung disease, nerve damage, or glucose-6-phosphate dehydrogenase (G-6-PD) deficiency (an inherited blood disease).
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking nitrofurantoin, call your doctor. Nitrofurantoin should not be taken by women in the last month of pregnancy.
talk to your doctor about the safe use of this medication if you are 65 years of age or older. Older adults should not normally take nitrofurantoin because it is not as safe as other medications that can be used to treat the same condition.
you should know that this medication may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
ask your doctor about the safe use of alcohol while you are taking this medication. Alcohol can make the side effects of nitrofurantoin worse.
plan to avoid unnecessary or prolonged exposure to sunlight and to wear protective clothing, sunglasses, and sunscreen. Nitrofurantoin may make your skin sensitive to sunlight.