Seizures and Tremors in Dogs With Kidney Failure

Name: Seizures and Tremors in Dogs With Kidney Failure
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-03

Seizures and tremors in a dog with kidney failure are a medical emergency. When the kidneys stop clearing waste products, those toxins build up in the bloodstream and reach the brain, causing a condition called uremic encephalopathy. This article explains why kidney failure in dogs seizures and tremors happen, what they look like, and what can be done.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Twitching, tremors, or a full seizure in a dog with known kidney disease is an emergency. Call your veterinarian or an emergency clinic right away.
The cause is usually toxin buildup in the brain from failing kidneys, a condition called uremic encephalopathy.
These signs often appear when kidney disease has advanced, so they can signal that the disease is worsening.
Treatment focuses on stabilizing the seizure, flushing toxins with fluids, and managing the underlying kidney disease.
Do not wait to see if it passes. Seizures that keep happening can be life threatening.

What Is Uremic Encephalopathy in Dogs?

Uremic encephalopathy is the medical term for brain dysfunction caused by kidney failure. When the kidneys can no longer filter waste from the blood, substances like urea and other nitrogen-based compounds accumulate. These toxins affect how the brain works, leading to neurologic signs.

Chronic kidney disease (CKD) is a common and progressive disorder in dogs. It involves irreversible loss of kidney function over time and is often seen in older dogs [1]. As the disease advances, the risk of neurologic complications rises.

Uremic encephalopathy is one of the more serious complications of kidney failure. It does not happen in every dog with kidney disease, and it is more likely as kidney function declines. When it does occur, it needs urgent veterinary care.

Signs Owners Notice: Seizures and Tremors in Dogs With Kidney Failure

The signs of uremic encephalopathy can be subtle at first and then worsen. Owners often describe a progression over hours or days.

Early signs may include:

Lethargy or unusual tiredness
Reduced appetite or refusing food
Vomiting, sometimes with bile
Muscle twitching or mild tremors
Staring into space or seeming disoriented
Weakness or unsteady walking

More serious signs include:

Tremors that come and go or become constant
Head pressing or circling
Full-body seizures, often generalized tonic-clonic (the type with stiffening and paddling)
Loss of consciousness
Behavior changes such as confusion or agitation

In a study of dogs with epilepsy, owners reported autonomic signs in nearly all cases, including drooling, urination, and dilated pupils during or around seizures [2]. These same signs can appear with uremic seizures, so do not assume a seizure is "just epilepsy" if your dog has kidney disease.

If your dog is vomiting bile along with these signs, see Dog Vomiting Bile Kidney Failure for more context. If your dog is having a seizure right now, go to Dog Having Seizure What To Do for step-by-step guidance.

Tremors vs. Seizures: What Is the Difference?

Tremors are rhythmic shaking movements that the dog may or may not control. Seizures are sudden electrical storms in the brain that often cause loss of awareness, stiffening, paddling, or collapse. Some movement disorders, like paroxysmal dyskinesia, cause episodic tremors and dystonia while the dog stays conscious, which can be confused with seizures [3]. Your veterinarian can help tell these apart, but in a dog with kidney failure, any new tremor or seizure should be treated as urgent.

Causes and Risk Factors: Why Kidney Failure in Dogs Causes Seizures

The main cause is the buildup of uremic toxins that the failing kidneys cannot remove. These toxins disrupt normal brain function. Other factors can add to the problem.

Electrolyte imbalances. Kidney failure can throw off sodium, potassium, calcium, and phosphorus levels. These imbalances can trigger tremors and seizures.
Metabolic acidosis. When the kidneys cannot excrete acid properly, the blood becomes too acidic. This can worsen brain dysfunction.
High blood pressure. Kidney disease often causes hypertension, which can lead to neurologic signs.
Anemia. Kidney disease reduces red blood cell production, which can worsen weakness and lethargy.
Underlying liver problems. Some dogs with liver shunts can develop neurologic signs and seizures after surgery or anesthesia, which shows how metabolic toxins affect the brain [4]. This is a different condition, but it illustrates the same principle: when the body cannot clear toxins, the brain suffers.

A study of dogs with stable CKD found that lower urine ammonia-to-creatinine ratios were linked to higher death rates and faster disease progression [5]. This suggests that how well the kidneys handle waste products matters for survival, though the direct link to seizures is not fully established.

Risk factors for uremic encephalopathy include advanced CKD stage, poor appetite, dehydration, infection, and sudden worsening of kidney function. Older dogs are more commonly affected because CKD is more common with age [1].

How Veterinarians Diagnose the Cause

Your veterinarian will start with a physical exam and a detailed history. They will ask about when the tremors or seizures started, how long they last, and what your dog was doing before they began.

Diagnostic steps may include:

Blood work. This checks kidney values (BUN and creatinine), electrolytes, phosphorus, calcium, and blood gases. It helps confirm kidney failure and find imbalances that could trigger seizures.
Urinalysis. This assesses how well the kidneys concentrate urine and can reveal protein loss or infection.
Blood pressure measurement. High blood pressure is common with kidney disease and can affect the brain.
Neurologic exam. This checks reflexes, awareness, and cranial nerve function.
Advanced imaging. In some cases, an MRI or CT scan may be recommended to rule out other causes like brain tumors or inflammation.
Cerebrospinal fluid analysis. This may be done if infection or inflammation is suspected.

Your veterinarian will also consider other causes of seizures, including epilepsy, toxins, and liver disease. In a primary care study, most seizures in dogs were generalized tonic-clonic, and some had additional signs [6]. That is why a full workup matters.

Table: Common Signs and What They May Mean

Sign	Possible Cause	Urgency
Mild twitching or tremors	Early uremic encephalopathy or electrolyte imbalance	Same-day vet visit
Vomiting and lethargy	Worsening kidney failure	Same-day vet visit
Full-body seizure	Uremic encephalopathy or other brain cause	Emergency now
Drooling and dilated pupils with seizure	Autonomic signs during seizure [2]	Emergency now
Head pressing or circling	Brain dysfunction from toxins	Emergency now
Collapse with loss of consciousness	Severe seizure or metabolic crisis	Emergency now

Treatment Options for Uremic Seizures

Treatment has two goals: stop the seizures and treat the underlying kidney failure.

Emergency Stabilization

If your dog is actively seizing, your veterinarian will give medication to stop the seizure. The exact drug and dose depend on your dog's weight, kidney function, and other health factors. Your veterinarian calculates the dose for your pet. Do not give any human seizure medication at home unless your veterinarian specifically instructs you to do so.

Fluid Therapy

Intravenous fluids are the cornerstone of treatment. They help flush out uremic toxins, correct dehydration, and balance electrolytes. This can reduce the toxin load on the brain and lessen neurologic signs.

Managing Electrolytes and Acid-Base Balance

Your veterinarian will correct imbalances in potassium, calcium, phosphorus, and blood pH. This may involve specific fluids, medications, or dietary changes.

Anti-Seizure Medications

If seizures continue or are likely to recur, your veterinarian may prescribe anti-seizure medication. The choice and dose are based on your dog's individual needs. Some medications are processed by the kidneys, so dosing must be adjusted carefully in kidney failure.

Treating the Underlying Kidney Disease

Long-term management includes a kidney-friendly diet, phosphate binders, blood pressure medication, and regular monitoring. A therapeutic renal diet is often part of the plan for dogs with CKD [5]. Your veterinarian will tailor the approach to your dog's stage of disease.

What You Can Do at Home

Keep a log of when tremors or seizures happen, how long they last, and what they look like.
Do not put your hands near your dog's mouth during a seizure. Dogs can bite unintentionally.
Keep your dog away from stairs, furniture, and water during a seizure.
Call your veterinarian after any seizure, even if it seems brief.

Recovery, Outlook, and Long-Term Management

The outlook depends on how advanced the kidney disease is and how well your dog responds to treatment. Some dogs improve with fluids and supportive care. Others may continue to have seizures or neurologic signs.

Uremic encephalopathy often signals advanced kidney disease. A study of dogs with CKD found that lower urine ammonia-to-creatinine ratios were associated with shorter survival and faster progression [5]. This means that how well the kidneys handle waste products can affect how long a dog lives with the disease.

Long-term management includes:

Regular blood work to monitor kidney values and electrolytes
Blood pressure checks
A prescription kidney diet
Medications for blood pressure, phosphorus, and sometimes seizures
Frequent veterinary visits to adjust the plan

Some owners face difficult decisions when seizures cannot be controlled and quality of life declines. If you are considering euthanasia, see Dog Seizures Put Down for a compassionate discussion of how to think through that choice.

Prevention: Can You Lower the Risk?

You cannot reverse kidney failure, but you can reduce the chance of neurologic complications by managing the disease well.

Feed a therapeutic kidney diet. This reduces the workload on the kidneys and helps control phosphorus and protein waste [5].
Give all medications as prescribed. Blood pressure medication, phosphate binders, and other drugs help slow progression.
Keep fresh water available at all times. Dehydration stresses the kidneys.
Monitor for early signs. Watch for vomiting, lethargy, and reduced appetite. These can signal worsening kidney function before seizures appear.
Keep regular vet appointments. Blood work can catch imbalances before they cause brain signs.
Avoid giving human foods or supplements without asking your vet. Some can worsen kidney function or interact with medications.

If your dog has a history of head shaking or unusual movements, see Dog Shaking Head Kidney Disease for related information. For movements that look like a seizure, Dog Shaking Head Back And Forth Seizure covers what to watch for.

Limitations and When to Contact a Veterinarian

This article gives general information. Your dog's individual case needs a veterinarian who can examine your pet, run tests, and set a treatment plan.

Call an emergency clinic now if:

Your dog is having a seizure that lasts more than a few minutes
Your dog has more than one seizure in a row
Your dog is unconscious, struggling to breathe, or not waking up
Your dog's tremors are constant and getting worse

Call your veterinarian the same day if:

Your dog has a first-time tremor or twitching episode
Your dog with known kidney disease becomes more lethargic or stops eating
Your dog vomits repeatedly or seems disoriented

Schedule a routine visit if:

Your dog has stable kidney disease and you want to review the management plan
You notice mild changes in appetite or energy that could signal progression

Do not wait to see if seizures stop on their own. Uremic seizures can be life threatening, and early treatment improves the chance of a better outcome.

Frequently Asked Questions

Can kidney failure cause seizures in dogs?

Yes. When the kidneys fail, waste products build up in the blood and affect the brain. This condition is called uremic encephalopathy, and it can cause tremors, twitching, and full seizures. It is a medical emergency that needs immediate veterinary care.

What do tremors from kidney failure look like in dogs?

Tremors often look like rhythmic shaking of the head, limbs, or whole body. They may come and go or become constant. Some dogs also seem disoriented or weak. In a dog with kidney disease, any new tremor should be checked by a veterinarian right away.

How long can a dog live with uremic encephalopathy?

The outlook varies widely. Some dogs improve with fluids and supportive care, while others continue to decline. Survival depends on the stage of kidney disease, how well the dog responds to treatment, and whether other organs are affected. Your veterinarian can give you a more specific estimate after evaluating your dog.

Is there a way to stop seizures from kidney failure at home?

No. Seizures from kidney failure need veterinary treatment, including fluids and anti-seizure medication. Do not give human medications at home unless your veterinarian tells you to. Keep your dog safe during a seizure and call your vet or an emergency clinic immediately.

Can a dog with kidney failure recover from a seizure?

Some dogs recover from a single seizure with treatment, but the underlying kidney failure remains. The risk of more seizures stays unless the toxin buildup is controlled. Long-term management focuses on slowing kidney disease and preventing future neurologic episodes.

References

Chronic kidney disease in a dog with hematologic and cardiovascular alterations: A case report. Open veterinary journal, 2026.
Owner reported prevalence of autonomic signs in epileptic dogs. Frontiers in veterinary science, 2026.
Canine paroxysmal dyskinesia: distribution of etiological subtypes and structural and reactive causes in a retrospective tertiary care cohort. Frontiers in veterinary science, 2026.
Postanesthetic neurologic signs progressing to seizures in 2 dogs and 1 cat with unoperated congenital portosystemic shunts after non-shunt-related surgery. Journal of the American Veterinary Medical Association, 2025.
Association of impaired ammonia excretion with survival in dogs with stable chronic kidney disease. Journal of veterinary internal medicine, 2026.
Prevalence of generalized and non-generalized seizure types in a primary care population of dogs. American journal of veterinary research, 2026.