Two Easy Ways to Start Earning Rewards!
Become a member today!
Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
Already a member? Sign in
Become a credit card member today!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
APPLY NOW
Learn More About Petco Pay Benefits

Is it safe to use fipronil and a flea collar on my cat at once?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 7 years and 11 months old | 6 lbs

Can I use fipronil and a cat collar at same time? I've had a collar on them for about 3 weeks, just gave them a bath ( no collar on) and just curious do can I put back on collar and administrator fipronil. Not sure of brand of collar, can't remember...

1 Answer

Most Helpful Answer

Answered By Maria DVM

Veterinarian

Published on December 12th, 2017

I would recommend only using one. I prefer topical over collars since not all collars work.

There are plenty of topical medications for cats that help prevent fleas and ticks. Some topical you can apply monthly while others like Bravecto can be applied once every 3 months.

Without knowing what type of collar and which fipronil product you are using I wouldn't use them together.

I would also wait 48 hours before and after a bath before putting topical medication on.

Thank you for using Petco Pet Education Center, formerly Petcoach.

1Pet Parents found this answer helpful

Smart Picks for Smart Questions

Related Questions

Is it safe to use cat flea drops and a flea collar at the same time?

Cats can be very sensitive to flea treatment products, and toxicity can occur from using two products at the same time. Because of that, it's not safe to give the flea drops and then put on the flea collar. Typically the flea drops should be enough to protect Tinkerbell from fleas, and I recommend using only that. I hope this helps!

Updated on September 23rd, 2025

Is it safe to use Bio Spot flea collar and Advantage II on cats?

Yes, you can use both of these flea preventatives simultaneously. However, flea collars are notoriously ineffective, so I never recommend them under any circumstance. If Cali is currently having an issue with fleas, you can instead give her an oral Capstar ( http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=10902 ) to kill adult fleas within 30 minutes, and use the Advantage to prevent fleas for a full month. If Cali is not currently experiencing a flea infestation, Advantage alone should be sufficient. Good luck! :-)

Updated on September 23rd, 2025

Is it safe to apply Advantage flea spray after fipronil on my cat?

In all likelihood, your kitty will probably be safe. However, I would advise using a product such as Capstar instead (nitenpyram) to most safely kill adult fleas without causing any sort of interaction.

Updated on September 23rd, 2025

Health & Wellness

Is it safe to give my cat a flea tablet after a spot-on treatment?

HI, thanks for using Petco Pet Education Center, formerly Petcoach! Eli is super cute! The soonest you can reapply the Spot On is 3 weeks. As for mixing drugs I would need to know what oral flea pill you want to give. Ideally if Eli is flea allergic she should get flea medications every month year round. Personally I see a lot of flea resistance with the Fipronil Spot On. I recommend Bravecto (topical), Comfortis (oral) or the Seresto collar for cats. I wish Eli a speedy recovery!

Updated on September 23rd, 2025

My cat has fleas. How long to wait between Hartz and Advantage II?

Fleas collars do not typically work well. Hartz is not as strong as most other flea medicines and tend to have the most reactions. Advantage is great one that is monthly, Bravecto is another great one and it will last for 3 months but requiers a prescription. I would wait at least 2 weeks in between the topicals for her safety and the flea collar does not matter for timing of products.

Updated on September 23rd, 2025

My cat still has fleas after spot-on. Can I use fipronil again?

It is labeled for use approximately every 4 weeks. If you need to use it more frequently, check with your veterinarian first. Most fleas live off the pet, necessitating the treatment of the environment as part of management. This includes vacuuming everywhere then disposing of the bag or emptying the canister outdoors immediately afterwards. Wash all bedding in the hottest water allowable. Use a cat safe area treatment to prevent reinfestation. A topical should be used for at least three consecutive months, preferably year round.

Updated on September 23rd, 2025

Health & Wellness

How long should I wait to use a flea collar after cat flea spray?

I would not recommend repeating treatment with similar ingredients for at least a month, especially in cats which are very sensitive to overdosing. It is important to treat bedding and sleeping areas to kill eggs and larvae before they hatch. If problems persist contact your vet for oral treatment such as comfortis

Updated on September 23rd, 2025

Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Share