Can Metronidazole Make My Dog Poop?

Can metronidazole make my dog poop uncontrollably for several days? Let’s understand what metronidazole is and what it does.

Metronidazole is a drug used to treat bacterial infections in humans and animals. Metronidazole has a molecular formula of C10H14N4O3S. It is also known by the names Flagyl, Metronidazole, and Nitroimidazole.

Metronidazole is used to treat anaerobic infections such as infections of the digestive tract, genital tract, and respiratory tract. It is a broad-spectrum antimicrobial drug that works by disrupting the synthesis of DNA in bacteria.

Can Metronidazole Make My Dog Poop?

Metronidazole can lower the healthy gut bacteria in dogs, causing more diarrhea. This is a side effect of the metronidazole medication in both humans and dogs.

Metronidazole can cause loose stools and weight loss if this occurs. The dose for dogs is 10mg/kg body weight three times daily. It can be given as tablets or oral liquid.

Learn more about What Should You Do If A Dog Poops In House After Being Outside – Reasons Why This Happens

How Does Metronidazole Work?

When metronidazole is taken orally, it enters the bloodstream and reaches the body’s tissues, where it can kill bacteria. Metronidazole is very effective against anaerobic bacteria. Anaerobic bacteria are bacteria that live in the absence of oxygen. The anaerobic bacteria that metronidazole treats include:

  • Bacteria that live in the digestive tract
  • Bacteria that live in the vagina
  • Bacteria that live in the respiratory tract

Metronidazole does not treat all types of bacteria, and it will not work against bacteria that live in the skin or on the skin. Metronidazole cannot be used to treat viral infections like colds, flu, or the common cold. Metronidazole is also not used to treat infections that occur in wounds or open sores.

It is important to follow the instructions provided by your doctor or pharmacist about how to use metronidazole.

Learn more about How Often Should Your Dog Go To The Bathroom?

How Is Metronidazole Prescribed?

The doctor or the vet will tell you how much metronidazole you should take. You may be given a liquid form of metronidazole. Or you may be given a tablet form of metronidazole. It is important that you follow the instructions on the label of the medication bottle. Your vet/doctor will give you metronidazole for at least 7 days. If you are taking it to treat a bacterial infection, your doctor may give you a larger dose or more often.

The doctor/ vet will also tell you how to take metronidazole. He or she may tell you to take it with food or liquids or to take it or without food or liquids. Follow the instructions carefully. Do not change them. This can cause problems if you do not follow the instructions as directed.

 How can I stimulate my dog to poop

What Are The Side Effects Of Metronidazole?

Metronidazole may cause side effects. These side effects are usually minor and go away quickly.

Metronidazole’s common side effects include; Nausea, diarrhea, vomiting, headache, dizziness, trouble sleeping, rash, itching, stomach upset, and pain.

If you notice any of these side effects, check with your healthcare provider/ the vet. You can reduce the risk of side effects by taking your medication exactly as your vet/doctor tells you to take it. Talk to your healthcare provider if you have questions about which doses are best for you.

Do not stop taking or administering metronidazole without first talking to your vet/ healthcare provider. Your healthcare provider may need to adjust your dose or change your medicine. Talk to your healthcare provider if you have questions about which doses are best for you.


Before using metronidazole, tell your doctor or pharmacist if you are allergic to metronidazole or other nitroimidazole medications, or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Metronidazole can cause serious side effects, including liver problems, vision problems, heart problems, and skin problems.

Is Metronidazole Safe To Use On Dogs?

Yes, metronidazole is safe to use in dogs. It has been used safely in dogs for more than 30 years. However, some adverse events have occurred when metronidazole is used in dogs at doses higher than those recommended for humans.

If you want to use metronidazole in your dog, make sure that your product is labeled for dogs. Talk to your veterinarian before using metronidazole in your dog. This medication may cause serious side effects, including liver problems, vision problems, heart problems, and skin problems. These side effects are rare but can occur.

Your vet will monitor your dog closely while they are taking this medicine. You should let your vet know if you have any concerns about side effects. Metronidazole is available as a generic medication.


For all of you asking, can metronidazole make my dog poop more than normal loose stools? The answer is yes. This medication must be administered under the vet’s direction to avoid any fatal reactions.

Frequently Asked Questions

Is it normal for my dog not to poop after taking metronidazole?

Metronidazole is a prescription medication used to treat bacterial infections, particularly anaerobic infections of the digestive system. It may also be used for the treatment of some protozoal diseases and certain types of fungal infections. Because your dog will have been treated with metronidazole, she will need to wait at least two weeks before you introduce other medications that could cause diarrhoea.

Can metronidazole cause constipation?

Metronidazole has been shown to cause diarrhoea in dogs and cats when used to treat intestinal parasites. While it is possible for your dog to have diarrhoea because of metronidazole, constipation is less likely. Your veterinarian can advise you about how long it will take for your dog to return to its normal bowel function.

How can I stimulate my dog to poop?

While metronidazole is known to cause diarrhoea in dogs, it can stimulate pooping in your dog with ease.  However, do not overdose it so that it diarrhoeas. Giving it the right amount of medication makes it poop.

Can dogs take metronidazole on an empty stomach?

Metronidazole is usually administered to dogs in its tablet form, but it can also be administered as a liquid solution or suspension. It should be administered at least 30 minutes before meals, although this may be longer if your dog has diarrhoea. You can administer it with food, but make sure to give your dog only one dose of metronidazole per day. If your dog has diarrhoea, do not give it metronidazole in combination with other medications.