Metronidazole is an antibiotic and antiprotozoal medication used to treat various conditions such as inflammatory bowel disease, nonspecific diarrheal disorders, infections caused by Giardia (a cause of diarrhea), and periodontal disease. Metronidazole requires a prescription from your veterinarian, and is sold by the tablet.
For: Cats and Dogs
Treats a wide array of ailments
An antibiotic that effectively treats inflammatory bowel disease
Remedies certain diarrheal disorders
Treats infections caused by Giardia (intestinal parasite)
Also treats periodontal disease
How it works:
Metronidazole is especially effective against anaerobic infections - bacteria that can live without oxygen. It's able to penetrate bone, making it especially useful in oral/dental infections. In addition, it has anti-inflammatory properties in the large intestine and is an effective anti-diarrhea medication for certain diseases.
Antibiotic medications can cause diarrhea, which may be the sign of a new infection. If your pet has diarrhea that is watery or has blood in it, contact your veterinarian. Do not use any medication to stop the diarrhea unless instructed by your veterinarian.
Brand Name Flagyl (Searle)
Generic Name Metronidazole
What is the most important information I should know about Metronidazole: Metronidazole is not FDA-approved for use in veterinary medicine; however, it is a commonly accepted practice for veterinarians to use this medication in dogs and cats. The usual dose of metronidazole in dogs is 3mg to 23mg per pound one to four times a day. The usual dose in cats is 5mg to 23mg per pound one or two times a day. The actual dose and duration of treatment depends on the specific condition being treated. Metronidazole should be given to your pet for the entire length of time prescribed by your veterinarian.
What is Metronidazole: Metronidazole is an antibiotic used to treat numerous ailments, including Giardia infections, inflammatory bowel disease, and infections in the mouth. Metronidazole may be used for other purposes than those listed in this guide.
What should I discuss with my veterinarian before giving Metronidazole to my pet: Do not give this medication if your pet is allergic to metronidazole, or if your pet is pregnant. Tell your veterinarian if your pet is allergic to any medications, or if your pet has any of the following: liver disease; anemia; epilepsy; or nerve disorders. Tell your veterinarian if your pet is pregnant or lactating, or if you plan to breed your pet.
How should this medication be given: Give metronidazole exactly as it is prescribed by your veterinarian. Do not give in larger amounts or use it for longer than recommended by your veterinarian. Follow the instructions on the prescription label. If you do not understand these directions speak to your pharmacist or veterinarian. Your veterinarian may want to perform blood tests on a regular basis to make sure the medication is not causing harmful effects. Store metronidazole at room temperature away from moisture and heat.
What happens if I miss giving a dose: Give the missed dose as soon as you remember. However, if it is almost time for the next regularly scheduled dose, skip the missed dose and give the next one as directed. Do not give a double dose of the medication.
What happens if I overdose the pet: Seek emergency veterinary medical attention if you think you have given your pet too much of this medication. Symptoms of overdose may include nausea, vomiting, dizziness, loss of balance or coordination, or seizures.
What should I avoid while giving Metronidazole: Antibiotic medications can cause diarrhea, which may be the sign of a new infection. If your pet has diarrhea that is watery or has blood in it, call your veterinarian. Do not use any medication to stop the diarrhea unless your veterinarian tells you to do so.
What are the possible side effects of Metronidazole: Seek emergency veterinary medical attention if your pet experiences any signs of an allergic reaction (hives; difficulty breathing; or swelling of the face, lips, tongue, or throat). Call your veterinarian at once if any of the following serious side effects occur: seizures; fever; chills; sores inside the mouth or on the lips; or watery or bloody diarrhea. Keep giving metronidazole and talk to your veterinarian if your pet develops any of these less serious side effects: nausea; diarrhea; dizziness; loss of balance; dry mouth; cough; sneezing; runny nose; or swollen tongue. Talk to your veterinarian about any side effect that seems unusual or that is especially bothersome to your pet.
What other medications will affect Metronidazole: Tell your veterinarian if your pet is using any of the following medications: cimetidine (Tagamet), phenytoin (Dilantin), Phenobarbital, or warfarin (Coumadin). There may be other drugs not listed that can affect metronidazole. Tell your veterinarian about all prescription and non-prescription (OTC) medications, including vitamins, minerals, herbal products, and drugs prescribed by other veterinarians. Do not start using a new medication without telling your veterinarian.
Where can I get more information: Your pharmacist has information about metronidazole written for health professionals that you may read.
Call your veterinarian for medical advice about any side effects to your pet. You may report side effects to the FDA at 1-800-FDA-1088.
Metronidazole is a prescription antibiotic used in dogs and cats to treat various conditions such as inflammatory bowel disease, nonspecific diarrhea disorders, infections caused by Giardia, and periodontal disease.
Metronidazole is not FDA-approved for use in veterinary medicine; however, it is a commonly accepted practice for veterinarians to prescribe this medication for dogs and cats.
The actual dose and duration of treatment with metronidazole depends on the specific condition being treated.
Tip: Metronidazole should be given to your pet for the entire length of time prescribed by your veterinarian. Do not give in larger amounts or use it for longer than recommended by your veterinarian.
The usual dose is 3mg-23mg/pound of your pet’s body weight, by mouth, 1 to 4 times a day
The usual dose 5mg-23mg/pound of your pet’s body weight, by mouth, 1 to 2 times a day
Storage: Store metronidazole at room temperature, away from moisture and heat.
My dog take Atopica for skin problems and she has been on this drug for about 2 years and I finally figured out after researching that this drug can cause bowel disorders. So I give my dog (beagle) 1/2 tab morning and night and her bowels are a bit firmer.
My 12yr old chocolate lab was beginning to have chronic diarrhea. We thought she had a bug and put her on it for a week. It worked for that week and soon as she was off, it came back. So she is on a maintenance dose of one in the morning and half at night! What a difference for the better! And she seems happy and always has an appetite!
Metronidazole came to my rescue!
I have two small dogs (yorkie & shih tzu). Both came down with terrible diarrhea and vomiting. I tried all the at home remedies, and nothing helped. On the 3rd day I gave up and took the dogs to see their vet. He prescribed Metronidazole. It all cleared up within a day and my pups were back to normal. My vet even gave me extra for when my pups occasionally need it. Definitely worth it!
This product keeps the ailment under control but does not eliminate the problem. However, my dog has cronic bowel disorder so I can only keep it under control and the dog comfortable.
I do everything possible to take care of my baby. He has a very weak stomach so these pills help so he doesn't get dehydrated. Thank you!
Hi I took my toy poodle Akira to vet. She tested positive for Giardia. The vet prescribed Metronidazole and qty 5.Too expensive for us to get it from vet. She is 6 months and 41/2 pounds. Interested in buying from you guys. What dosage can I give her? Thanks.
My cat is 16 yrs. old, has had diarrhea for over six weeks, the vet first prescribed prednisone, diarrhea got worst. Has now prescribed Metronidazole, 250 mg cut into 4 pieces, 1 piece per day. May cat weighs 6 pounds. I worry that the dose is to strong. What is the dose per weight? Warning states not to give to debliated animal. Fecal direct smear-no parasites seen.
Vet also wrote script for Fortiflora give once a day. Thank you for any help
6 months ago
Diarrhea is a side effect of prednisone. The usual dosage range for a 6 pound cat is 30mg to 138mg once to twice daily. Forti-Flora is an over the counter item. Please purchase that item for your pet as it has very good results.
This information sheet is for educational purposes only and is intended to be a supplement to, and not a substitute for, the expertise and professional judgment of your veterinarian. The information is NOT to be used for diagnosis or treatment of your pet. You should always consult your own veterinarian for specific advice concerning the treatment of your pet. The information is not intended to cover all possible uses, directions, precautions, warnings, allergic reactions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for your pet. It is not a substitute for a veterinary exam, and it does not replace the need for services provided by your veterinarian. Note: Any trademarks are the property of their respective companies.
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