Are you also constantly thirsty and passing a lot of urine? Let's talk about Nephrogenic Diabetes Insipidus.

Do you also feel thirsty all day long? No matter how much water you drink, you still feel like you don't have enough? Do you also need to urinate frequently and in large amounts? You may think this is normal, or you may even think it's diabetes. However, this can also be a symptom of a rare medical condition called 'Nephrogenic Diabetes Insipidus'. Let's talk about this simply, in a way that you can understand.

What is Nephrogenic Diabetes Insipidus?

Simply put, nephrogenic diabetes insipidus is a condition in which your kidneys are unable to properly regulate the amount of fluid in your body. Our bodies produce a hormone called Antidiuretic Hormone, or ADH for short. Some people also call it Vasopressin. This hormone, ADH, "tells" our kidneys how much water to excrete in the urine and how much to retain in the body.

The kidneys of a person with nephrogenic diabetes insipidus do not respond properly to this ADH hormone. That is, even though the ADH hormone gives a signal to "retain water and reduce urine," the kidneys do not listen to it. What happens then is that the kidneys produce more urine than necessary. This can quickly, sometimes dangerously, lead to dehydration, that is, a lack of water.

How common is this condition?

Scientists aren't exactly sure how many people have nephrogenic diabetes insipidus, but they believe it's a very rare condition. That means it's not a disease that everyone gets.

Are there different types of Diabetes Insipidus?

Yes, there are four types of diabetes insipidus. Let's see what they are:

• Central Diabetes Insipidus: This occurs when there is damage to the pituitary gland or hypothalamus in your brain. These are the parts of your brain that produce, store, and release the hormone ADH. This damage prevents your body from regulating ADH normally.
• Nephrogenic Diabetes Insipidus: In this type of diabetes we are talking about today, the kidneys are unable to respond properly to the ADH hormone. Even though the ADH hormone is present, the kidneys seem to ignore it.
• Dipsogenic Diabetes Insipidus: Also called 'Primary Polydipsia', this is caused by a defect in the thirst control mechanism in your hypothalamus. This causes you to feel extremely thirsty, feel the need to drink water frequently , and urinate excessively.
• Gestational Diabetes Insipidus: This only occurs during pregnancy. Sometimes an enzyme produced by the placenta breaks down the ADH hormone. This goes away after the baby is born.

What is the difference between Nephrogenic Diabetes Insipidus and Diabetes Mellitus?

This is a very important issue that many people are confused about. When we hear the word "diabetes," we think of sugar, which means diabetes mellitus. However, although some of the symptoms of nephrogenic diabetes insipidus and diabetes mellitus (such as excessive urination and excessive thirst) are similar, these two diseases are completely different.

Diabetes Mellitus is a much more common disease. It is caused by a lack of the hormone insulin or by the body not using insulin properly, which causes high blood sugar levels. However, nephrogenic diabetes insipidus is a problem that occurs when the kidneys do not respond to the ADH hormone and has nothing to do with blood sugar levels . So, it's best not to confuse the two, right?

What are the causes of Nephrogenic Diabetes Insipidus?

Our kidneys are responsible for filtering blood and removing waste and extra fluid from the body as urine. The hormone ADH (vasopressin) helps maintain a balance between the amount of water we drink and the amount of urine we excrete.

Imagine, when a healthy person sweats a lot or drinks less water, ADH levels increase, telling the kidneys to 'make less urine, save water in the body.' Similarly, when there is enough water in the body, ADH levels decrease, telling the kidneys to 'it's okay, just make urine now.'

However, if your body doesn't respond to ADH properly, your kidneys produce too much urine. This is what happens in nephrogenic diabetes insipidus. This condition can be inherited (hereditary) or it can develop at any time in your life (acquired) .

Acquired nephrogenic diabetes insipidus

This is the most common type. It occurs when something interferes with the body's ability to respond to ADH. For example, it can be caused by certain conditions that affect your kidneys. Such conditions include:

• Amyloidosis – This is when an abnormal protein is deposited in organs including the kidneys.
• Certain types of cancer
• Chronic kidney disease
• Kidney infections, for example, pyelonephritis
• Polycystic kidney disease – This is when fluid-filled cysts form in the kidneys.
• Medullary sponge kidney

There are other reasons that affect this:

• Certain medications: Especially lithium (used for some mental illnesses) when used long-term.
• Low potassium levels in the blood (hypokalemia)
• Increased calcium levels in the blood (hypercalcemia)
• Sickle cell anemia
• Sjögren's syndrome – This is a disease of the immune system.
• Urinary tract obstruction – for example, something like a urinary stone.

Hereditary nephrogenic diabetes insipidus

This is caused by mutations in the genes AVPR2 or AQP2. These genes tell the body how much water to add to the urine. When these genes are defective, the kidneys are unable to respond to ADH. Symptoms of nephrogenic diabetes insipidus, which is congenital, usually appear within the first few months of life .

What are the symptoms of Nephrogenic Diabetes Insipidus?

Imagine, you know someone, let's say Sumana. Sumana is incredibly thirsty all day long. She works with a big bottle of water nearby. But within an hour of drinking, she's thirsty again, and she also has to go to the toilet frequently, and she urinates a lot. Sometimes she gets up two or three times a night to urinate. She thought, 'Maybe it's because I'm drinking too much water.' But these are the main symptoms of nephrogenic diabetes insipidus.

A person with nephrogenic diabetes insipidus may have symptoms like:

• Signs of dehydration: Dry mouth, chapped lips, extreme fatigue, feeling dizzy, and sometimes blue-eyed when standing. Think of it like being in the sun for a long time without water.
• Polydipsia: Feeling like you're not getting enough water no matter how much you drink.
• Excessive urination (Polyuria): If an adult urinates more than 3 liters per day (normally between 5-20 liters!), and if a child urinates more than 2 liters per day, it is suspicious. The urine is also very light in color, like water.

If a young baby has this condition, they may show symptoms like these because they don't understand how to speak:

• Diarrhea
• Failure to thrive and gain weight – Does not gain weight or grow taller than other babies.
• Frequent fever
• Constant restlessness and crying (Irritability) – the baby seems to be in distress.
• Loss of appetite, decreased milk intake
• Seizures – This is a dangerous sign.
• Vomiting
• Having to change wet diapers frequently.

How is Nephrogenic Diabetes Insipidus diagnosed?

If you have these symptoms, the first thing you should do is see a doctor. He or she will ask you questions, examine you, and, if necessary, order tests such as:

• Blood tests: Check the level of electrolytes, such as sodium, in the body, and kidney function.
• Urine tests: Check the concentration of urine (how dilute it is), and what's in the urine.
• Water deprivation test: This involves not drinking any fluids for several hours, and then monitoring your weight, urine output, and blood and urine concentrations hourly. This is a difficult test, but it is very important for diagnosis. This is the only way to accurately determine whether the kidneys are responding to ADH. This test is done under medical supervision in a hospital.
• Testing with ADH hormone: Sometimes, ADH hormone is given as an injection along with the water deprivation test, and then it is checked whether the urine concentration changes. In nephrogenic diabetes insipidus, even if ADH is given, the urine concentration does not change much.
• MRI scan of your pituitary gland (Magnetic resonance imaging): If you suspect a condition like central diabetes insipidus, look for any abnormalities in the brain.
• Genetic testing: If someone in your family has diabetes insipidus, or if you suspect it is an inherited form.

Is there a complete cure for Nephrogenic Diabetes Insipidus?

To be honest, there is currently no complete cure for nephrogenic diabetes insipidus.

But don't worry. It can be managed. Your doctor may be able to change the medications you're taking that are causing the problem (such as lithium). Also, if there is another underlying condition (such as kidney disease or a calcium/potassium imbalance), treating it properly can sometimes reverse or control nephrogenic diabetes insipidus.

So how do you treat this?

In cases where it is irreversible (for example, congenital), treatment is mainly aimed at preventing dehydration and maintaining a good quality of life. This can include:

• Drink water regularly: This is the most important thing. You should drink water throughout the day, whenever you feel thirsty. Be sure to drink more water, especially on hot days, when exercising, or when you are sweating. Keep a bottle of water nearby at night, too.
• Changes in diet:
• Low-salt diet: Eating too much salt increases thirst and urination.
• Low-protein diet: Sometimes you may be told to limit protein, because water is also needed to flush out the waste products produced during protein digestion.
• Medications that reduce urine output:
• Thiazide diuretics: Surprisingly, these diuretics, when given to people with nephrogenic diabetes insipidus, reduce the amount of urine they produce. This is a bit complicated, but they are useful.
• Amiloride: Can be given in combination with thiazides, especially for NDI caused by lithium.
• Prescription Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): For example, indomethacin. These help to make the kidneys a little more sensitive to ADH.

What foods and drinks should someone with this condition avoid?

Your doctor may tell you to limit alcohol, caffeinated beverages (such as coffee, tea, and some soft drinks), salty foods (such as pickles, dried meats, sausages, and chips), and possibly high-protein foods, as these can cause your body to lose more water and increase your fluid intake.

Are there ways to prevent Nephrogenic Diabetes Insipidus?

There are no proven strategies to prevent this. Especially the congenital type cannot be prevented. However, for the acquired type:

• If you are taking medications that can cause NDI, such as lithium, it is important to talk to your doctor about it and have your kidney function checked regularly.
• The risk can be reduced by promptly and properly treating underlying health problems (kidney disease, electrolyte imbalances).

If I have this condition, what should I expect?

This is the best news. With proper treatment and a healthy lifestyle , people with nephrogenic diabetes insipidus usually have fewer major complications and can live a normal life. You can work and enjoy life as normal.

However, if not managed properly, this can lead to serious complications. Let's take a look at what they are:

• Dehydration: This is the most common and most serious complication. Severe dehydration can lead to loss of consciousness, seizures, and kidney failure.
• Electrolyte disturbance: This is a change in the amount of electrolytes (such as sodium and potassium) in the body. This can affect heart rate and nerve function.
• Infections: Things like Urinary Tract Infections (UTI) and kidney infections.
• Developmental delays, brain damage and intellectual disability in infants. This is very dangerous for young children. Therefore, if a baby has these symptoms, treatment should be started immediately.
• Kidney failure: Can occur in the long term if not properly controlled.
• Hydronephrosis: Because the bladder is constantly full, urine backs up and the kidneys swell.

When should you seek medical advice?

If you have any doubts or concerns about the amount of urine you are passing, especially if you are passing a lot of urine with excessive urination, definitely see a doctor.

The amount of urine an adult passes per day can vary from person to person, especially depending on how much water they drink. But if you're urinating more than 2-3 liters per day (some definitions say more than 3 liters), or if you're urinating very frequently (more than seven or eight times a day) , it could be a sign of a problem.

Before seeing a doctor, it is very helpful to keep a diary of how much water you drink and how much urine you produce (measured if possible). This will make it easier for the doctor to understand your condition.

So, what are the things we should remember from this story? (Take-Home Message)

Nephrogenic Diabetes Insipidus is a rare condition in which your kidneys do not respond properly to the hormone ADH in your body, causing you to produce too much urine. This can lead to rapid dehydration.

• The main symptoms are excessive thirst and excessive, watery urination .
• This should not be confused with diabetes mellitus; in this case, the blood sugar level is normal.
• This condition can be present at birth or develop later in life.
• Although there is no complete cure, with proper medical treatment and lifestyle changes (especially drinking enough water and controlling your diet), you can live a normal, healthy life.
• If you suspect that you or your child has any of these symptoms, seek medical advice immediately. Don't panic, but the most important thing is to be informed and take the necessary steps. You are not alone, and doctors can help you.

` Nephrogenic diabetes insipidus, kidney disease, excessive urination, excessive thirst, ADH, vasopressin, dehydration