Pyrimethamine/Levamisole HCl Oral Suspension (Anhydrous)
Pyrimethamine/Levamisole HCl is a compounded formulation containing Pyrimethamine, Levamisole HCl, 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.
This compounded formulation combines pyrimethamine, an antiprotozoal (folate-pathway inhibitor), with levamisole, an immunomodulator — two different drug classes. In compounding practice, clinicians may consider a combination like this for a multi-targeted approach. Your veterinarian determines whether it is appropriate based on your animal's diagnostic findings.
This description reflects the general pharmacology of the active ingredient's drug class; your veterinarian determines whether this approach is appropriate for your animal.
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.
At a pharmacological level, pyrimethamine is used in the context of managing folate synthesis in protozoa while levamisole is used in the context of managing parasite nervous systems and may modulate the immune response. Commonly observed effects include behavioral shifts such as lethargy or localized digestive changes. Because it can influence blood cell counts, your veterinarian will monitor for observational signs of sensitivity through regular blood work. Owners should monitor for coordination changes or skin irritation and contact their veterinarian promptly with any concerns regarding the patient's response.
Yes. This combination requires a valid prescription from a licensed veterinarian before it can be dispensed. Mixlab verifies all professional authorizations before preparing any medication.
Yes. Mixlab specializes in compounding pyrimethamine and levamisole into customized strengths and flavored oral formats, such as oral pastes or liquids, to support easier administration for your horse.
Veterinarians discuss this combination for its ability to help manage the protozoa responsible for this condition while also supporting the animal's immune signaling. This offers an approach to managing complex neurological challenges.
Your veterinarian will recommend periodic blood work to monitor for observational signs of bone marrow suppression. This monitoring ensures the management approach remains safe for your horse's health.
Neurological recovery is slow. Your veterinarian will perform periodic exams to monitor for observational signs of improved coordination and provide a specific schedule for the management course.
