Does Nitrofurantoin Make You Urinate More?

Does Nitrofurantoin Make You Urinate More

Nitrofurantoin is a commonly prescribed antibiotic for urinary tract infections (UTIs). It is known for its effectiveness in eliminating bacteria that cause these infections. However, patients often ask if it makes them need to pee more.

It’s important to understand the mechanism of action of this medication and its effects on your body, so you can handle symptoms better while getting treated for a bladder infection.

In this article, we explore the question of whether Nitrofurantoin causes increased urination, examining its mechanism of action and potential side effects. We also offer insight into managing symptoms during treatment for UTIs.

Nitrofurantoin is an antibiotic specifically used to treat and prevent different types of urinary tract infections (UTIs) such as cystitis (inflammation of the bladder) and pyelonephritis (kidney infection). It works by killing the bacteria that cause these infections, making it a highly effective treatment option.

Nitrofurantoin comes in different forms like capsules, tablets, and liquid suspensions. It is usually taken orally 2-4 times a day for anywhere between 5-7 days, depending on the severity of the infection.

Unlike other antibiotics that enter the bloodstream and systemic circulation to exert their effects, Nitrofurantoin concentrates directly in the urine, where it attacks the infection-causing bacteria.

Common Uses of Nitrofurantoin

Nitrofurantoin is mainly used for the following purposes:

  • Treating Acute Urinary Tract Infections (UTIs): It is most effective against acute, uncomplicated infections of the bladder (cystitis).
  • Preventing Recurrent UTIs: For patients prone to recurrent UTIs, Nitrofurantoin can be prescribed as a preventative measure.
  • Eradicating Bacteria in the Urine: Before surgical procedures of the urinary tract, Nitrofurantoin may be used to ensure the urine is free of infection-causing bacteria.

Overall, Nitrofurantoin is a common and effective treatment option for UTIs, but does it cause increased urination as a side effect?

Also Read: Why Azo Didn’t Turn My Pee Orange? What’s the Reason

Understanding Diuretic Effects

What are diuretics?

Diuretics, commonly known as “water pills,” are medicines that help your body get rid of extra water and salt through pee. They work on the kidneys and flush excess water and sodium, helping to reduce swelling, lower blood pressure, and treat conditions like heart failure, liver cirrhosis, and certain kinds of kidney disease.

How do diuretics work?

They work by stopping the kidneys from holding onto sodium, which means more sodium and water come out when you pee. There are different kinds of diuretics, and doctors pick them based on what health issue they are treating and what they want the pill to do.

Nitrofurantoin and Urination

Does Nitrofurantoin Increase Urination Frequency?

No, Nitrofurantoin does not increase the frequency of urination. Unlike diuretics, Nitrofurantoin works by killing the bacteria responsible for urinary tract infections directly in the urine, rather than affecting the kidney’s handling of water and salt.

Patients may experience some other side effects while taking this medication, like mild diarrhea, nausea, or headaches, but increased urination is not typically one of them.

It is important for patients experiencing symptoms of increased urine output to consider other causes or consult their healthcare provider, as these symptoms may not be directly related to the use of Nitrofurantoin.

How Nitrofurantoin affects urination

While Nitrofurantoin itself doesn’t make you urinate more, its therapeutic action against UTIs can lead to changes in urination patterns.

UTIs often cause symptoms such as a frequent urge to urinate, a burning sensation during urination, and passing only small amounts of urine at a time.

As Nitrofurantoin combats the bacterial infection, these uncomfortable symptoms gradually decrease, potentially leading to a temporary increase in the volume of urine as the body returns to its normal urinary function.

How to manage increased urination

If you’re experiencing increased urination while taking Nitrofurantoin for a UTI, here are some tips for managing this symptom:

  • Stay Hydrated: Drink plenty of fluids throughout the day to help flush the bacteria from your urinary tract. Water is best, but cranberry juice may also be beneficial due to its infection-fighting properties.
  • Monitor Fluid Intake: While staying hydrated is important, it’s also wise to monitor your fluid intake to avoid excessive consumption, especially before bedtime.
  • Practice Good Bathroom Habits: Go to the bathroom as soon as you feel the need to urinate instead of holding it in, and make sure to empty your bladder completely.
  • Maintain Cleanliness: Good personal hygiene practices can help prevent further irritation. Wipe from front to back after using the toilet to prevent bacteria from spreading.
  • Wear Comfortable Clothing: Loose-fitting clothes and cotton underwear can keep the area around your urethra dry, reducing the risk of bacterial growth.
  • Avoid Irritants: Steer clear of products that can irritate the bladder, such as caffeine, alcohol, and spicy foods, as well as scented feminine hygiene products.

If increased urination persists or is accompanied by other symptoms (e.g., fever, back pain, or blood in the urine), it’s important to consult your healthcare provider for further evaluation and management.

When to consult a doctor

While occasional fluctuations in urination patterns are common and not usually a cause for concern, certain symptoms warrant prompt medical attention.

If you experience severe side effects from Nitrofurantoin, such as intense abdominal pain, jaundice (yellowing of the skin or eyes), blurred vision, or significant changes in urination frequency that don’t resolve, it’s super important to talk to a doctor.


Nitrofurantoin is a good medicine for stopping and treating bladder infections because it kills the bad germs in the urine. It doesn’t make you pee more often, but knowing how to handle any side effects can make people feel better while they’re taking it.

It’s very important for people to learn about their health, talk to their doctors, and ask for help if something feels wrong, so the medicine can work well and they can stay healthy.


Can Nitrofurantoin be used for any type of UTI?

Nitrofurantoin is most effective for acute, uncomplicated urinary tract infections (UTIs), particularly those affecting the bladder, known as cystitis. It might not be the best choice for more complicated UTIs or kidney infections.

How quickly does Nitrofurantoin start working?

Nitrofurantoin usually starts working within a few days of starting treatment. Most people begin to feel relief from their symptoms within 48 hours. However, it’s crucial to finish the entire course of the medication, even if you feel better, to ensure that the infection is fully cleared.

Why does nitrofurantoin change urine color?

Nitrofurantoin can change the color of urine to a dark yellow or brown. This is a harmless side effect resulting from the medication’s elimination through the urine and its interaction with urinary components. It is not a cause for concern and should be resolved after the medication is discontinued.



The information provided in this article is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Don’t ignore professional medical advice or put off seeking it just because of something you read here. Although we aim to offer precise and current information, we do not guarantee its completeness, accuracy, reliability, suitability, or availability for any purpose. Using the information in this document is at your own risk. We are not responsible for any losses or damages caused by our content.

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