Can flea medication cause cats to lose weight?

CatChannel veterinary expert, Arnold Plotnick, DVM, discusses weight loss in cats.

Printer Friendly

Q: My 7-year-old cat, Bambi, who was the runt of the litter, has been losing weight over the past two months. Although he has always been a slim cat, I've noticed that his face looks a bit sunken and not as full as it should be. His back hip area appears thinner than usual. He eats well and drinks well. His bowel movements are good. I use Frontline® Plus on him. Because I don't want Bambi to get the full dosage of the medicine, I split the dose with my other cat, Romeo. Knowing that it is a pesticide to ward off fleas and ticks, I worry about the side effects. What do you think is causing the weight loss?

A: You shouldn’t split the Frontline® Plus dosage. This is a very safe product. By splitting the dose, you may be compromising its effectiveness.

I’m much more concerned about the weight loss. It is not normal for a cat to lose weight despite having a normal appetite and thirst. Your cat should be examined by your veterinarian. If nothing obvious is detected during a physical examination, blood tests should be performed to rule out a metabolic cause for the weight loss, such as diabetes. If the blood tests do not reveal a cause of the weight loss, further diagnostics, such as an abdominal ultrasound or endoscopy, may be warranted. Inflammatory bowel disease, a treatable condition, is a common cause of weight loss in middle-aged cats.

Printer Friendly

 Give us your opinion on
Can flea medication cause cats to lose weight?

Submit a Comment   Join Club
Earn 1,000 points! What's this?
Reader Comments

Barbara    Troutdale, OR

5/16/2015 2:14:52 PM

Article great. But how do I know if my cat has 'bugs' in her ears? How do I treat it? Every vet visit has cleared her for clean ears. I bought a Seresto collar in April and I am wondering about it't long term effectiveness. She is starting to sctch a lot arounf neck and ears.

ayana    kingman, AZ

1/9/2008 10:24:46 AM

this is graet

brad    ont, ON

12/27/2007 6:04:29 AM

good information, I wasn't aware of that!

View Current Comments

Top Products