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CONTRIBUTOR(S): Emma Chandley, Linda Horspool,

Medication: Fipronil

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Your dog has been prescribed Fipronil to help control and prevent fleas and some ticks and aid in the control of some other external parasites. Fipronil works by targeting the nervous system of fleas and ticks, effectively killing them.

ℹ️Key points:
  • Fipronil is a widely used medication for controlling fleas and ticks in dogs.
  • It is usually applied as a topical spot-on on the back of your dog's neck.
  • Application instructions must be followed carefully for safe and effective use.
  • Avoid contact with the treated area until it dries completely.

  ℹ️This information sheet is designed to help answer commonly asked questions and help you give the medication safely and effectively to your pet. It does not contain all the available information for this medication. If you have other questions or need more information, contact your veterinarian or pharmacist. ⚠️Always follow the dosing instructions provided by your veterinarian.

Name, Brand names, Class of medication and Storage

Name

  • Fipronil.

Brand name

  • Frontline.
  • Frontline Plus.
  • Pet Armor.
  • Effipro.
  • Fiproguard. 

Class of medication

  • Phenylpyrazole insecticide.
Storage
  • Store at room temperature, away from moisture and direct sunlight.
  • Keep out of reach of children and pets.

Why has my dog been prescribed fipronil?

Your dog has been prescribed fipronil to help protect him or her from fleas and ticks. Fipronil works by targeting the nervous system of fleas and ticks, effectively killing them.

How is the medication given?

Fipronil is usually applied as a topical solution between the shoulder blades of your dog. It is applied here to prevent your dog from licking the product off. Your veterinarian will guide you on the frequency of application, this is usually once a month, for continuous flea and tick control.

Are there any side-effects or drug interactions?

The following side-effects have been reported:

  • Mild skin irritation at the application site.
  • Temporary hair loss or reddening around the treated area.
  • Rarely, excessive drooling, vomiting, or lethargy if ingested.
 

Drug interactions can occur with:

Fipronil generally does not have known drug interactions. It is widely used as a safe and effective product for flea and tick control in dogs. Always consult your veterinarian if your dog is on other medications.

How long will my dog need to receive this medication?

Fipronil is usually prescribed for regular use. This is to ensure continuous protection of your pet from these parasites. Your veterinarian will help you determine the best application schedule based on your dog’s lifestyle and his or her exposure to these external parasites.

How should I dispose of this medication if I don’t use it all?

Dispose of unused fipronil according to your veterinarian’s guidance or local disposal regulations. Avoid flushing it down the toilet or drain or placing it in the bin, as it could harm the environment. Check with your veterinary team to see if they take back medication for disposal.

What if I miss a dose or give an extra dose?

If you miss a dose of fipronil, apply the dose as soon as you remember, but avoid doubling up if it’s close to the next scheduled application. If an extra dose is applied by mistake, monitor for signs of skin irritation or unusual behavior and contact your veterinarian for advice.

My dog is unwell, should I still apply this treatment?

If your dog is unwell, consult your veterinarian before applying fipronil, as certain health conditions might affect its suitability.

What should I do if this medication is accidentally given to another pet or taken by a human?

Fipronil should only be used on the dog for which it was prescribed. If another pet or a human accidentally ingests or contacts the medication, seek veterinary or medical advice promptly.

Will my dog need to be monitored while on fipronil?

No regular monitoring is required, but contact your veterinarian if you notice any side effects or if the treatment appears to not be working.

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