Flagyl for Dogs

Flagyl for dogs hasn’t been approved but it is used by some veterinary specialists. Flagyl is also known as metronidazole is an antibiotic that can be used in various canine infections. Flagyl reduces inflammation and will also eliminate bacteria. Even if Flagyl has many benefits, it is important to be aware of the possible side effects of the drug.

Uses of Flagyl in Dogs

Flagyl in dogs may be used to treat bacterial infections. The drug is prescribed if the bacteria causing the infection are identified as anaerobic.

Flagyl may be used in:

  • Gastrointestinal infections
  • Surgery wound infections
  • Oral cavity infections and periodontal disease
  • Reproductive system infections
  • Internal organ inflammations
  • Intestinal parasite (such as Giardia)
  • Pancreatic insufficiency

Flagyl is effective to reduce inflammation and will remove the bacteria. A cure of Flagyl can reduce diarrhea and intestinal problems if the dog has an intestinal infection.


Flagyl dosage should be determined by the vet according to the type of infection and the age and weight of the dog.

You should never give Flagyl to your dog if not recommended by the vet and you should always follow the guidelines of the vet. Never increase or decrease the dosage.

When administering the drugs, they should be added to the dog’s food. Flagyl may have a bitter taste and it may not be liked by all dogs, but you need to make your dog swallow the pills at all cost.

Side Effects of Flagyl

Some of the most common side effects of Flagyl include lack of appetite and vomiting, due to the taste and compounds of the drugs.

Other possible side effects include:

  • Excessive drooling
  • Acid reflux
  • Pawing the mouth
  • Gagging
  • Diarrhea
  • General state of weakness
  • Blood in the urine
  • Liver damage
  • Low white blood cell count
  • Dilated pupils
  • Lack of coordination (ataxia)
  • Head tilt
  • Brain damage

The neurological symptoms are very rare, but may be experienced. Dogs that get a lengthy treatment with Flagyl are more likely to develop more severe side effects.

If you notice any of these side effects, you should visit the vet. The side effects will disappear once the treatment is discontinued.

Toxicity may occur if the dog gets a higher dosage than recommended. Toxicity can build up in a matter of 7 to 10 days. If you notice your dog is confused, has seizures or faints, you should get veterinary help.

Flagyl Contraindications

Flagyl shouldn’t be administered to puppies, pregnant dogs or lactating mothers.

The ingredients of Flagyl can cause liver damage, so the drug is not recommended if the dog has liver disease or other issues. The vet will find an alternative treatment that causes no liver damage.

Dogs that have had the lyme disease should avoid Flagyl, as it is more likely the dogs will develop Flagyl toxicity.