What is metabolic alkalosis?

Metabolic alkalosis is a condition where the body's acid-base balance shifts too far toward alkaline. It is often caused by prolonged vomiting or electrolyte loss. Pets may become lethargic, vomit, or develop involuntary muscle twitching, and a vet will need to assess blood and electrolyte results before recommending treatment. Please consult your vet.

Will treatment require hospitalisation?

Whether hospitalisation is needed depends on your pet's condition and test results. Significant dehydration, repeated vomiting, or seizures usually require intravenous fluids and close monitoring in hospital. Mild cases may be monitored through outpatient rechecks and home observation, according to your vet's advice.

How soon is follow-up needed after treatment?

The first follow-up blood test and clinical assessment is usually arranged within 24-72 hours after treatment starts. Further rechecks depend on electrolyte recovery and the underlying cause, so follow your vet's instructions.

What can I observe at home to help the vet assess my pet?

You can record vomiting frequency and what the vomit looks like, appetite and water intake, mood and activity level, plus urination and bowel movements. Photos or videos shared with your vet can also help with diagnosis and monitoring.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

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Disease Guide

Canine and Feline Metabolic Alkalosis: Weakness, Vomiting, Electrolyte Testing & Care [2025]

Metabolic alkalosis is a serious electrolyte imbalance, often seen with severe vomiting or diuretic use, and requires urgent treatment

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap editorial team

Sources: AAHA, ACVIM, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Persistent inability to stand or brief loss of consciousness
•Repeated severe vomiting for more than 24 hours
•Generalized seizures or uncontrollable tremors

Schedule a veterinary appointment as soon as possible (within 24-72 hours)

•Persistent marked lethargy or decreased activity
•Small amounts of ongoing vomiting or obvious refusal to eat
•Persistent dry mouth with clearly decreased skin elasticity

01What symptoms suggest something is wrong?

Metabolic alkalosis often causes generalised weakness and digestive or neurological signs. Because electrolytes and acid-base balance are disrupted, pets may become less active, vomit, or develop seizures.

Ongoing weakness, unsteady standing, or obvious lethargy
Repeated vomiting or being unable to eat normally for more than one day
Dry mouth, changes in drinking, or reduced skin elasticity (signs of dehydration)
Seizures, muscle tremors, or unusual behaviour
Changes in breathing, heart rate, or activity rhythm need close attention
If any of the above signs appear, arrange a veterinary consultation as soon as possible

02How can I judge changes at home? Key observations and when to seek emergency care

Observing and recording key information at home helps your vet assess the situation faster and decide which tests are needed.

Record how often vomiting occurs, and note the colour and contents of the vomit
Watch for when your pet's mood and activity levels change
Write down appetite and actual food intake each day (measured or estimated)
Observe urination and bowel movement frequency, colour, and any abnormalities
Weigh your pet regularly and record short-term weight changes
Bring your notes, photos, or videos to the clinic, or upload them for your vet

03How will the vet diagnose it? Common tests

At the clinic, diagnosis usually starts with a physical exam plus blood and urine tests. An ECG or advanced imaging may be added when needed to identify the cause and any complications.

Complete physical examination

assessing pulse, mucous membranes, and any swelling

Blood pressure measurement

checking circulation, perfusion, and haemodynamic status

Blood and biochemistry tests

measuring electrolytes and acid-base status

Urinalysis

assessing kidney function and changes in urinary electrolytes

Electrocardiogram (ECG)

checking for heart rhythm or electrical abnormalities

Advanced imaging (such as CT) or specialist tests may be arranged if needed

Choose a hospital or specialist clinic that can perform the above tests

04How is it treated and managed after diagnosis? Medication, diet adjustments, and care guidance

Treatment mainly involves supportive care and electrolyte correction. Regular monitoring of blood values and clinical response is needed so the care plan can be adjusted.

Adjust supportive care and medical treatment based on test results
Control repeated vomiting, restore hydration, and correct electrolyte imbalances
Adjust diet and fluid intake to help stabilise metabolic status
Schedule regular rechecks to monitor blood values and electrolyte changes
Home care focuses on rest, hydration, and watching for changes in symptoms
If clinical signs or test results do not improve, specialist care or further testing is recommended

05What should I prepare before seeing the vet? Key details that help clarify the cause quickly

Write down when symptoms started, how they changed, and how long they lasted

List food intake and water intake records from the past three days

Keep or photograph vomit, stool, or urine for your vet to review

Record toileting frequency, colour, and any abnormal findings

Prepare a list of all current medications and supplements

Bring any previous test reports or imaging results to the appointment

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.