Shake the bottle well before each dose. Take this medication by mouth with food as directed by your doctor. This medication is usually taken 4 times daily to treat an infection or once daily at bedtime to prevent infections. Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.

The dosage and length of treatment is based on your medical condition and response to treatment. Children's dosage is also based on weight.

This drug may be mixed into water, juice, milk, or formula to improve the taste. Rinse the mouth after each dose to help prevent temporary staining of the teeth.

Do not use magnesium trisilicate-containing antacids while taking this medication. These antacids can bind with nitrofurantoin, preventing its full absorption into your system.

For the best effect, take this antibiotic at evenly spaced times. To help you remember, take this medication at the same time(s) every day.

When taking this medication to prevent infection, take it exactly as directed by your doctor. Do not skip doses or stop taking it without your doctor's approval. Tell your doctor if you notice signs of a bladder infection (such as pain while you are urinating).

If you are taking this medication to treat an infection, continue to take this medication until the full prescribed amount is finished, even if symptoms disappear after a few days. Stopping the medication too early may result in a return of the infection.

Tell your doctor if your condition lasts or gets worse.