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Metrogyl (Metronidazole)

Written by Dr. Feargus McConnell, BVSc on the Jan.16, 2024

Petdirect is dedicated to providing educational pet health content for pet parents. This article was written and reviewed by veterinary professionals to answer common questions about your pet’s medication. Our focus is on delivering unbiased information to help you understand how medication works, its potential side effects, and FAQs for your reference. Always administer medication directly as prescribed by your vet. This article shouldn’t take the place of advice from your vet.

What is Metrogyl?

Metrogyl contains Metronidazole as the main active ingredient which is an antibiotic and antiprotozoal medication effective against certain types of bacteria and protozoal parasites. In cats and dogs, it's primarily used to treat infections in the digestive tract. This medication targets anaerobic bacteria, which thrive without oxygen, and is also effective against certain protozoal parasites, including giardia. Additionally, Metronidazole can be prescribed for some types of inflammation in the digestive tract.

How does it work?

The active ingredient, Metronidazole operates by disrupting the DNA of bacteria, effectively killing them. Its action on protozoal parasites is less understood. It also appears to block specific inflammatory pathways, making it useful in treating inflammatory diseases in the digestive system.

Dose and Administration

The dosage of Metronidazole for pets depends on the animal's weight and the type of infection. It's usually administered with food and should be given for the entire prescribed period.

Missed Dose:

If you miss a dose, administer it as soon as possible, but skip it if it's nearly time for the next dose. Do not give extra or double doses.

Overdose:  

An overdose of Metrogyl can lead to vomiting, decreased appetite, and severe neurological symptoms. If you suspect an overdose, contact your veterinarian immediately contact the New Zealand National Poisons Centre at www.poisons.co.nz/animal-helpline/ or phone 0800 869 738.

Contraindications and Precautions

Extended courses of metronidazole should be prescribed with caution in animals with compromised hepatic or renal functions.

Potential Side Effects

Most cats and dogs tolerate Metrogyl well, but some side effects include:

  • Vomiting
  • Diarrhoea
  • Fatigue
  • Weakness
  • low white blood cell counts
  • blood in urine
  • appetite loss
  • yellowing of gums or eyes
  • neurological symptoms like coordination issues
  • dilated pupils
  • seizures

Long-term or high-dose use may increase the risk of neurological side effects. If any of the above side effects are observed contact your veterinarian immediately.

Storage

Store Metrogyl in a controlled environment, ensuring the container is tightly sealed and kept away from moisture and light. Keep out of reach of children and other pets.

Frequently Asked Questions (FAQ)

Does Metronidazole Kill Worms in Dogs?

  • Metronidazole doesn't kill intestinal worms but is effective against certain protozoa like giardia. A faecal test by your vet can determine the right treatment for intestinal parasites.

Is Metronidazole an Antibiotic for Dogs?  

  • Yes, it is an antibiotic used for treating specific bacterial infections in dogs.

Can Metronidazole Cause Constipation in Dogs?

  • Constipation is not a common side effect. It's often used to treat diarrhoea in dogs.

What Does Metronidazole Do for Cats?

  • It treats diarrhoea, certain bacterial infections, and intestinal protozoa like giardia, and can be used for inflammatory diseases of the intestinal tract.

Conclusion

Metronidazole is a versatile medication used in veterinary care for cats and dogs. As with all medications, it should only be used under the guidance of a qualified veterinarian.

We hope this article provides a clear understanding of Metrogyl for your pet. Remember, always seek advice from your veterinarian for any health-related decisions for your pets.