Can I use another flea product with my cat's PetLock (Imidacloprid)?

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear about the flea problem. Yes, you can use Capstar with any topical flea/tick medicine as far as I know. I don't know of any that Capstar is contraindicated. Great question and good luck.

Thanks for using Petco Pet Education Center, formerly Petcoach! Yes, you may in about 5-6 days. However, I would highly recommend you use a stronger and likely more efficacious product. There are plenty of flea products in the market and a lot of them are very effective. I prefer Bravecto and Frontline plus. You can pick one of those products. The nice thing about Bravecto is that it is very effective and it is only applied once every 3 months. You can also use a product called Capstar along with one of the previously mentioned products which can help kill a lot of fleas at once. Remember to vacuum all the surfaces that have contact with your pup regularly. This is very likely going to work well. Good luck and have a great day!

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. Flea products should not be combined as there is an increased risk of side effects. The manufacturers state that they do not have data on using two or more flea products at the same time, hence they consider that as potentially dangerous. So, if Seresto is not working for Spike, you need to take it off and start giving Capstar (or any other new flea treatment) after 2-3 days.

Thanks for using Petco Pet Education Center, formerly Petcoach! I certainly understand your frustration. There are 2 products that I particularly like in these cases where different therapies have failed to help. I like Bravecto as a preventative and Capstar to be used concurrently as needed for fleas. Capstar is crucial because it can help kill a lot of fleas at once and it can be used as often as once daily to effect. Also, it is important to vacuum the house and all things that have contact with them frequently. Try this for 1-3 months and if does not make a difference, they may have another type of allergy such as a food allergy or environmental allergy. This is likely going to help. Good luck and have a good night!

You can use both products on the same day so it is fine to start the Advantix at any time. There are better products that Advantix. Top products for dogs are oral products such as Simparica and Nexgard. Top products for cats are topicals such as Revolution and Cheristan. There is also an oral product called Comfortis that both dogs and cats can take. You will need to switch all the pets over to a good flea product. Make sure to discuss these products with your veterinarian first. These products are generally safe for all pets but there are some conditions which are contraindicated for the oral products. Cleaning up and treating the house and yard will also help but it will not clear all the fleas. The main control is making sure the pets are on good products. This is what will ultimately stop the infestation. Also remember every female fleas lays about 50 eggs a day and it could take up to 6 months before the eggs hatch. Therefore, you will need to treat for at least 6 months. Best of luck and please feel free to post any additional questions.

Hi and thank you for your question on Petco Pet Education Center, formerly Petcoach! Generally speaking, it is advised to administer one type of topical flea/tick preventative at one time. Administering more than one topical type in a 30 day period may be an overload to her system. The Fipronil is liking absorbed already, so I would not advise you apply the Vectra. Instead, you may ask your veterinarian about a administering capstar or another fast acting oral flea treatment medication. Next month, you may apply the Vectra. Hopefully that will do the trick.

The short answer is...it is not recommended in most situations. Combining different medications may increase the risk of negative side effects, adverse reactions or can lead to an overdose situation which could put your pet's life at risk. Due to the variety of [different products](https://www.petcoach.co/article/should-you-use-a-prescription-flea-and-tick-preventive) available on the veterinary market today, pet owners are encouraged to discuss the [best preventative option](https://www.petcoach.co/article/whats-the-difference-between-oral-and-topical-flea-and-tick-preve) for their individual pet with their veterinarian. If a pet has[ fleas](https://www.petcoach.co/article/fleas-life-cycle-anatomy-disease-transmission), most pet owners want to find the fastest treatment option available. In these cases, Capstar ([nitenpyram](https://www.petcoach.co/pet-medication/nitenpyram)) is an oral flea medication available over the counter for dogs and cats that starts treating fleas in 30 minutes and kills 90 percent of adult fleas on a pet within four hours. While Capstar dosing can continue as frequently as every day, topical flea and tick preventatives can be used in conjunction with this oral medication to provide longer lasting treatment and prevention. Oral [flea and tick preventives](https://www.petco.com/shop/en/petcostore/category/dog/dog-and-puppy-flea-and-tick) available for dogs with a prescription from your veterinarian are Credelio, Nexgard, Simparica, and Bravecto. Products that are available with a prescription from your veterinarian for flea treatment include Comfortis or Trifexis. These products also begin to kill fleas quickly and provide ongoing prevention, and do not usually require the concurrent use of a topical medication. If a topical [flea preventative fails](https://www.petcoach.co/article/6-reasons-your-flea-prevention-isnt-working), most oral products can be safely used concurrently. ### Capstar is a trademark of Elanco or its affiliates.