# Eclampsia in Cats: Symptoms, Treatment, and Recovery Cat eclampsia treatment starts with one phone call: if your nursing mother cat is trembling, twitching, or unsteady, she needs an emergency veterinarian right now. Eclampsia is a sudden, life-threatening drop in blood calcium that shows up most often in the first weeks of nursing, and it does not get better on its own. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Tremors, twitching, staggering, and a stiff, unsteady walk in a cat that recently gave birth are emergency signs, not normal new-mother tiredness. - Call an emergency veterinary hospital before you drive. Tell them your cat is nursing kittens and may have eclampsia so they can prepare calcium treatment. - Do not wait to see if she improves. Untreated eclampsia can progress to seizures, coma, and death [1]. - Do not give human calcium pills or supplements at home. Too much calcium can cause dangerous hypercalcemia and kidney injury [2]. - Bring the kittens or a plan for them. Mom may need to stay at the hospital, and the kittens will need feeding in the meantime. ## What Is Eclampsia in Cats? Eclampsia, also called periparturient hypocalcemia, is a metabolic emergency caused by a dangerously low level of calcium in the blood [1]. The word "periparturient" means around the time of birth, and that timing matters. Signs can appear during labor, right after delivery, or most often during peak milk production a couple of weeks later [1]. Calcium does far more than build bones. It helps nerves fire and muscles contract, including the heart. When blood calcium falls, the nervous system becomes overexcitable. That is why the first signs are usually muscle twitching and tremors, and why the condition can escalate to full seizures [1]. Eclampsia is well known in dogs, especially small breeds nursing large litters, and it does occur in cats. Cats are often better at hiding early signs, which is one reason owners mistake the first tremors for exhaustion. A mother cat who is quiet, shaky, and off her food after giving birth deserves a call to your veterinarian the same day, and any twitching or staggering means go now. ## Cat Eclampsia Symptoms: What You Will Actually See The signs build in a fairly predictable order. Catching them early is the whole point. ### Early signs - Restlessness, pacing, or panting - Fine muscle tremors, especially in the face, ears, and legs - Stiff, choppy gait or a wobbly walk - Hiding from the kittens or refusing to nurse - Reduced appetite or stopping eating ### Later signs - Staggering and falling over (ataxia) - Disorientation, staring, or not responding normally to you - Twitching that becomes stronger and more frequent - Seizures - Collapse, coma, and death if untreated [1] Veterinarians describe eclampsia as progressive neurologic disease: tremors and ataxia first, then disorientation, then seizures and coma [1]. The timeline can be short. Some cats go from "a little shaky" to seizing within hours, so treat any tremor in a nursing mother as urgent. One more thing to watch: hypocalcemia can also occur during labor and may interfere with normal contractions, which can slow or stall delivery [1]. If your cat is in labor and seems to be straining without progress, that is also an emergency. ## Causes and Risk Factors Eclampsia happens when calcium leaving the body through milk outpaces what the body can replace. Nursing a litter is the classic trigger, and peak lactation (roughly two to three weeks after birth) is the highest-risk window [1]. Risk factors to keep in mind: - Nursing a large litter, especially for a small cat - First-time mothers - Poor appetite during nursing, so less calcium coming in - Small body size with high milk demand - Any condition that lowers blood calcium, including kidney disease. In cats with azotemia (elevated kidney values), ionized hypocalcemia was mild in about 76% of cases, moderate in about 23%, and severe in about 1% [3] Calcium problems in cats are not always about nursing. Hypercalcemia (too much calcium) is a separate condition and can be caused by things like certain tumors, including a parathyroid carcinoma that produced parathyroid hormone in one reported cat [4]. If your cat has high calcium on bloodwork, that is a different workup than eclampsia. The related article on [Feline Hyperthyroidism: Signs, Diagnosis, and Treatment](/knowledge/veterinary-medicine/clinical-methods/feline-hyperthyroidism-signs-diagnosis-and-treatment) covers another common cause of abnormal bloodwork in older cats. ## How Veterinarians Diagnose It Diagnosis starts with the story: a cat that recently gave birth, is nursing, and has tremors or staggering. That combination is enough for a presumptive diagnosis, and treatment often begins before lab results come back [1]. Confirmation comes from measuring the calcium level in the blood [1]. Your veterinarian will also run other tests to rule out problems that look similar, such as low blood sugar, kidney disease, infection of the uterus, or a toxin exposure. Expect a physical exam, bloodwork, and possibly an electrocardiogram, because calcium affects the heart rhythm. If your cat is not nursing and has low calcium, the vet will look for other causes. Kidney disease is a common one in cats. In a large group of azotemic cats and dogs, low ionized calcium was most often linked to kidney-related or post-renal causes in cats, and the lowest calcium values usually appeared within the first 48 hours of hospitalization [3]. ## Cat Eclampsia Treatment: What Happens at the Hospital Treatment is fast and usually dramatic. Most cats improve quickly once calcium is replaced. ### Calcium replacement The veterinarian gives calcium intravenously, slowly, while watching the heart. The dose is calculated for your cat's weight and condition, and it is never something to attempt at home. Calcium given too fast or in too large an amount can cause serious harm. In one reported cat, an overdose of calcium gluconate led to severe hypercalcemia, coma, cardiovascular instability, and acute kidney injury, and the cat needed hemodialysis to survive [2]. That case shows both how powerful this treatment is and why it belongs in a hospital. ### Supportive care - IV fluids to support circulation and kidney function - Monitoring of heart rate and rhythm during calcium administration - Treatment of seizures if they are occurring - Warmth, oxygen, and quiet handling to reduce stimulation ### Managing the kittens The mother often needs to stop nursing, at least temporarily, because milk production keeps pulling calcium out of her body. Your veterinary team will help you plan kitten feeding with a commercial kitten milk replacer. Do not put the kittens back on mom until your veterinarian says it is safe. ### Other calcium-related emergencies Calcium gluconate is also used in cats for other reasons, such as protecting the heart when potassium is dangerously high from a urinary blockage [5]. If your cat is a male with a urethral obstruction, that is a different emergency with a different treatment plan, and it also needs immediate care. ## Recovery, Outlook, and Long-Term Management Most cats with eclampsia respond quickly to intravenous calcium. Many are noticeably better within hours, though they usually stay hospitalized for monitoring and repeat bloodwork. Recovery depends on a few things: - How low the calcium was and how long signs lasted - Whether seizures occurred - Whether the cat can safely stop nursing - Any underlying disease, such as kidney problems If the kittens can be hand-fed or fostered, the mother's calcium demand drops and her risk of relapse falls with it. If you want to keep the kittens with her, your veterinarian will decide when that is safe and may recommend calcium supplementation under direct supervision. The dose and product are set by your veterinarian based on your cat's weight and bloodwork, never by guesswork at home. Long term, most cats return to normal if the trigger (nursing) is removed and no other disease is present. If your cat has kidney disease, calcium levels may need ongoing monitoring. A related article, [Feline Feline Hypertension: Diagnosis and Management](/knowledge/veterinary-medicine/clinical-methods/feline-hypertension-diagnosis-management), explains why blood pressure and kidney health are tracked together in cats with chronic conditions. | Stage | What You See | What To Do | |---|---|---| | Early | Tremors, restlessness, not nursing, off food | Call your vet now, same-day visit | | Moderate | Staggering, disorientation, twitching | Emergency visit immediately | | Severe | Seizures, collapse, unresponsive | Emergency now, call ahead while driving | | After treatment | Improving but tired, needs monitoring | Follow discharge instructions exactly | ## Prevention You cannot always prevent eclampsia, but you can lower the risk. - Feed a complete and balanced diet for pregnancy and nursing, and do not restrict food while she is nursing. - Keep the litter size in mind. A small cat with a big litter is at higher risk, so talk to your veterinarian about supplemental kitten feeding early. - Watch for the first tremors and act. Early treatment is easier and safer than treating seizures. - Do not give calcium supplements during pregnancy without veterinary guidance. Timing and dose matter, and unsupervised calcium can cause its own problems [2]. - Schedule a postpartum check for mom and kittens, especially if she seems tired, shaky, or uninterested in food. If your cat has other chronic conditions, keep routine care current. The article on [Cat Hypothyroidism: Symptoms, Diagnosis, and Treatment Options](/knowledge/veterinary-medicine/senior-and-chronic-care/cat-hypothyroidism-symptoms-treatment) is a good example of why regular bloodwork helps catch problems before they become emergencies. ## Limitations and When to Contact a Veterinarian This article cannot tell you whether your specific cat has eclampsia. Only a veterinarian who examines her and checks her blood calcium can do that. Call an emergency veterinary hospital right now if your nursing cat has: - Any seizure, collapse, or loss of consciousness - Twitching, tremors, or muscle stiffness that will not stop - Staggering, falling, or inability to stand - Heavy panting with a stiff gait - Labor that has stalled Call your veterinarian the same day if your nursing cat: - Refuses to eat or nurse - Seems unusually tired, hiding, or restless - Has a wobbly walk you are not sure about Schedule a routine visit if your cat recently gave birth and seems fine but you want a postpartum check, or if you are planning a pregnancy and want nutrition guidance. ## Frequently Asked Questions ### How long does cat eclampsia treatment take to work? Most cats improve within hours of intravenous calcium, but they usually stay in the hospital for monitoring and repeat bloodwork. Your veterinarian will decide when she is stable enough to go home. ### Can I treat eclampsia at home with calcium supplements? No. Giving calcium at home during an emergency is dangerous and can cause hypercalcemia, coma, and kidney injury. Treatment requires intravenous calcium given slowly under heart monitoring in a hospital. ### Will my cat be able to nurse her kittens again? Sometimes, but not always, and it depends on how she responds and whether nursing would push her calcium down again. Many veterinarians recommend hand-feeding the kittens with kitten milk replacer while mom recovers. ### Is eclampsia the same as milk fever? Yes, eclampsia is often called milk fever, and it means the same thing: low blood calcium around birth and nursing. The medical term is periparturient hypocalcemia. ### Can a cat get eclampsia without nursing a litter? It is possible but uncommon. Low calcium in cats is more often linked to other conditions such as kidney disease, so your veterinarian will look for those causes if your cat is not nursing. ## Related Articles - [FIP in Cats: Symptoms, Diagnosis, and How It Is Treated Today](/knowledge/veterinary-medicine/symptom-guides/fip-in-cats-symptoms-diagnosis-treatment) - [Cat Hypothyroidism: Symptoms, Diagnosis, and Treatment Options](/knowledge/veterinary-medicine/senior-and-chronic-care/cat-hypothyroidism-symptoms-treatment) - [Feline Feline Hypertension: Diagnosis and Management](/knowledge/veterinary-medicine/clinical-methods/feline-hypertension-diagnosis-management) - [Cat Allergy Treatment](/knowledge/veterinary-medicine/clinical-methods/cat-allergy-treatment) - [Feline Hyperthyroidism: Signs, Diagnosis, and Treatment](/knowledge/veterinary-medicine/clinical-methods/feline-hyperthyroidism-signs-diagnosis-and-treatment) - [Cat Dehydration Symptoms: How to Tell and What to Do](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-dehydration-symptoms-how-to-tell) - [Eclampsia in Cats: Symptoms, Risks, and Emergency Care](/knowledge/veterinary-medicine/emergency-and-first-aid/eclampsia-in-cats) - [Can Milk Fever Kill a Cat? Eclampsia Signs and Treatment](/knowledge/veterinary-medicine/emergency-and-first-aid/milk-fever-cats-fatal) - [Eclampsia in Dogs: Symptoms, Treatment, and Prevention](/knowledge/veterinary-medicine/emergency-and-first-aid/eclampsia-dogs-symptoms-treatment) ## References 1. [Eclampsia in Small Animals - Metabolic Disorders](https://www.merckvetmanual.com/metabolic-disorders/disorders-of-calcium-metabolism/eclampsia-in-dogs-and-cats). Merck Veterinary Manual. 2. [Successful treatment of severe iatrogenic hypercalcemia and acute kidney injury with hemodialysis in a cat](https://pubmed.ncbi.nlm.nih.gov/42485625/). Journal of veterinary internal medicine, 2026. 3. [Severity, etiology and outcomes of ionized hypocalcemia in azotemic cats and dogs](https://pubmed.ncbi.nlm.nih.gov/42382116/). Frontiers in veterinary science, 2026. 4. [A case of suspected ectopic parathyroid chief cell carcinoma in a cat](https://pubmed.ncbi.nlm.nih.gov/41905940/). The Journal of veterinary medical science, 2026. 5. [Pharmacological therapy for hyperkalemia in feline urethral obstruction has no additional benefit over intravenous fluid and calcium gluconate therapy and prompt unobstruction](https://pubmed.ncbi.nlm.nih.gov/40562375/). Journal of the American Veterinary Medical Association, 2025. ## Further Reading - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information)