Metronidazole (as Benzoate) Oral Suspension (Anhydrous)
Metronidazole (as Benzoate) is a compounded formulation containing metronidazole (as benzoate), prepared by Mixlab for veterinary use. Available by prescription.
How to Give Anhydrous Oral Suspension
Oral Suspension (Anhydrous) is a liquid medication that does not contain water in its base. This might be an oil-based or other special base to help stabilize the medicine. It will look like a regular liquid medication, but often needs a good shake because the drug can settle. Here's how to give it:
- Shake well each time to mix the medication (5-10 seconds).
- Measure the dose using the syringe/dropper provided or one recommended by your vet. Insert the top of the oral syringe into the bottle adapter. Turn the bottle upside down and pull the plunger until the medicine reaches the volume required
- Hold your pet steady: a towel or helper can assist with squirmy pets.
- Administer the dose slowly into the side of the mouth. Allow small pauses if needed for swallowing.
- Raise the head slightly to help the medication go down and clean any spills with a little water or tissue.
- Praise your pet and offer a treat or water (unless advised against feeding right after).
- Clean the syringe with water immediately after use. Store the bottle as directed, out of sunlight.
- Consistency is key: Shake each time, measure accurately, and contact your vet if any issues arise.
The uses and pharmacology described below reflect the FDA-approved labeling for this active ingredient; your veterinarian determines whether and how they apply to your animal's treatment plan.
Veterinarians most commonly consider metronidazole benzoate when a patient presents with clinical signs of gastrointestinal distress, such as acute or chronic diarrhea. It is frequently a point of discussion for managing infections caused by anaerobic bacteria or protozoal organisms like Giardia. Beyond the digestive tract, veterinarians may consider its use in protocols for dental disease or abscesses where anaerobic pathogens are a clinical concern. By disrupting the internal stability of susceptible microorganisms, your veterinarian can manage the physiological environment during an active infection.
At a pharmacological level, metronidazole acts as a prodrug that is taken up by anaerobic bacteria and protozoa. Once inside the microorganism, it is reduced by intracellular transport proteins to form unstable, highly reactive intermediate metabolites. These metabolites bind to the pathogen's DNA, causing strand breakage and inhibiting nucleic acid synthesis, which leads to cell death. Metronidazole benzoate is an ester form of the medication, characterized by its relative lack of the bitter taste associated with metronidazole base, which can support compliance during administration. Your veterinarian will determine the appropriate application of this medication based on the results of physical examination and specific diagnostic testing.
Prescription only. Use only under the direction of a licensed veterinarian. This information is not a substitute for veterinary diagnosis, prescribing or monitoring. Compounded drugs are not approved by the FDA for safety or effectiveness.
Commonly observed effects of metronidazole benzoate administration include mild gastrointestinal changes such as decreased appetite, vomiting or excessive salivation (hypersalivation). Because the benzoate form is often selected to improve palatability, owners may find it easier to administer than other formulations. However, at high doses or during prolonged use, veterinarians monitor for signs of neurological health shifts, including loss of coordination (ataxia), tremors or head tilts. If you observe significant stumbling, persistent lethargy or any unusual behavioral changes, contact your veterinarian promptly.
This medication is typically used with extra caution or avoided in patients with known liver impairment, as the liver is the primary site of its metabolism. It is also carefully evaluated in pregnant or lactating animals, as nitroimidazoles can cross the placental barrier and appear in milk. Before starting a protocol, ensure your veterinarian has a complete history of all other prescriptions and supplements your pet is receiving, as it may interact with certain anticoagulants or sedative agents. Your veterinarian is the right person to design a comprehensive monitoring plan and provide guidance on the necessary duration of therapy to ensure the management approach remains suitable for your pet's individual needs.
Yes. Metronidazole benzoate is a prescription medication and can only be dispensed by a licensed pharmacy upon receipt of a valid authorization from a licensed veterinarian. Mixlab verifies all authorizations before any medication is prepared or shipped to your home.
Yes. While metronidazole is available in various commercial tablet formats, the benzoate form is frequently compounded by Mixlab into flavored oral liquids or customized strengths. This is often done to improve the flavor and ease of administration for pets that are sensitive to the bitter taste of standard metronidazole.
Veterinarians commonly discuss metronidazole benzoate for patients, especially cats, because it lacks the intense bitterness found in the base medication. By choosing the benzoate form, your veterinarian aims to support more consistent dosing by making the medication more acceptable to the pet.
Owners should monitor for signs such as a lack of balance, unusual eye movements or tremors, which may occur if the medication levels become high. It is important to report any such coordination changes to your veterinarian immediately to ensure the management plan remains safe.
