Hyperparathyroidism in Cats: What it is and What to Expect

cat after surgery
Reading Time: 5 minutes


Moderate to severe

Table of Content

Key points

  • Primary hyperparathyroidism is less common than secondary hyperparathyroidism.
  • Hyperparathyroidism causes hypercalcemia (high calcium).
  • Cats with hyperparathyroidism may have no symptoms at first.
  • A veterinarian is needed for diagnosis.
  • Primary hyperparathyroidism is often treated with surgery.

Common in

Symptoms & types

Symptoms of hyperparathyroidism in cats include: constipation, poor appetite, lethargy, muscle tremors, excessive thirst, excessive urination, bloody urine.

Understanding the diagnostics

Learning about the causes

Cats who have too much parathyroid hormone will release calcium from their bones and absorb calcium from their guts, making their blood calcium levels too high.

Best treatment options

Home remedies and their effectiveness

Surgery is the best treatment option as it is usually curative. Medication can be used to lower calcium levels, but these are not often used long term.

When to see a vet


Dr. Hannah Godfrey MRCVS graduated from the Royal Veterinary College in 2011. Although she initially worked in mixed practice treating all species, she found a love for small animal work and has worked exclusively with dogs and cats since 2014. She lives in Wales with her partner, son, and two cats (named Poppy and Ashton Kutcher), and writes comedy fiction in her spare time.

More Articles

Working Hours:

Home Visits8am – 7pm (Mon – Sat), varies by location

On-call Support: 
8am – 12am EST (Mon – Fri)
8am – 9pm EST (Sat – Sun)

Home Visits:
8am – 7pm (Mon – Sat), varies by location

On-call Support:
8am – 12am EST (Mon – Fri)
8am – 9pm EST (Sat – Sun)

Contact Us

Contact Us

Get Our Newsletter

Sign up to receive our latest updates, tips, and exclusive offers. No spam.

Selling/Sharing Preferences

In order to complete your request, please complete the following information. By submitting this request, you are asking us not to share your information with third-parties in exchange of anything of value. For more details about your right to direct us not to sell your personal information, please see here.

Thank you for contacting us!

Our team members will review your message and reach out to you shortly.

We Received Your Appointment Request!

One of our team members will call you soon to confirm the details of your appointment.