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My senior cat with kidney disease is lethargic. What helps low energy?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 10 lbs

I have a 13 yr old cat, weight 10 lbs., diagnosed in 2016 with CRF. Creatinine 313. Potassium 3.7., 150mls Lactated ringers 3x week. Would potassium supplementation help with her low energy level? My vet is reluctant to add potassium to her meds. because it is difficult to adjust. Should I be seeking a second opinion?

1 Answer

Most Helpful Answer

Jenna Beyer, DVM, MBA, cVMA

Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on August 4th, 2019

3.7 for a potassium level isn't very low, but the normal reference range can vary from machine to machine, so you would need to include the normals for me to guage how low it truly is away from the "normal". Potassium supplementation must be taken very seriously, because overdoses can stop the heart. I do not routinely recommend it unless it is trending lower and lower. I would recommend discussing supplementing B12, since this will often help lethargic cats.
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