Is my cat's B12 or Prednisolone treatment feeding his cancer?

Question

Hello, My cat Bugger has had skin cancer below his eye for 5 years. It is getting bigger. I have heard that the b12 shots he has been receiving feeds the cancer and makes it progress. He takes it for inflammatory bowel disease. His vet does not know. I don't know if I should stop giving it to him. He also receives Prednisolone every other day - one half of a 5 mg pill. I am afraid that could also make the cancer grow. Please advise. Thank you. Linda. Pet's info: Cat | Domestic Shorthair | Male | 17 years old

Linda G, MS, DVM · Accepted Answer

Hello. At this point in time, there is no credible information concerning carcinogenicity and Vitamin B12. Long term studies in animals have just never been done. In any situation where you have co-morbidities, in this case IBD & skin cancer, you & your veterinarian have to decide if the risk of one possible problem outweighs the benefit it gives for the other problem. Since there is no credible information associating B12 with cancer growth, & it is controlling Bugger's intestinal symptoms, you must decide about continuing the supplement. Thanks for contacting Petco Pet Education Center, formerly Petcoach.

Is my cat's B12 or Prednisolone treatment feeding his cancer?

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