Ponazuril/Vitamin E Succinate Paste

Paste medications are thick and sticky, usually given by mouth using a syringe or tube. They’re often used for dewormers or other oral meds in horses, dogs, and cats. The key is to aim for the back of the mouth so your pet swallows the paste instead of spitting it out.

For Horses:

1. Set the dose on the syringe if it has markings (usually based on weight).
2. Stand beside your horse, not in front, and have someone hold them if possible.
3. Gently insert your thumb into the side of the horse’s mouth (between the teeth) to open it.
4. Insert the syringe into that gap and squirt the paste toward the back of the tongue.
5. Lift the horse’s head slightly and encourage swallowing by stroking the throat or gently blowing on the nostrils.
6. Watch for licking or chewing—that means they swallowed. If paste spills out, check how much was lost and contact your vet if unsure.
7. You can offer a little water afterward and reward them with a treat like a carrot if allowed.

For Dogs & Cats:

1. Gently open your pet’s mouth or slip the syringe into the side of it.
2. Aim toward the back of the tongue and squirt the paste in.
3. Hold the mouth closed briefly, and rub the throat or blow gently on the nose to encourage swallowing.
4. Give praise or a treat afterward to make it a positive experience.

Aftercare:

1. Wipe your pet’s mouth if needed.
2. Clean or recap the syringe as instructed.
3. Store the tube according to label directions.

Tip: Paste can feel weird to pets at first. For horses, try giving applesauce by syringe ahead of time so they get used to the sensation.

This compounded formulation combines ponazuril, an antiprotozoal, with vitamin e, a fat-soluble antioxidant — 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.

At a pharmacological level, ponazuril acts as a coccidiocide by targeting the apicoplast, an essential organelle found in the protozoa. By disrupting this organelle, the medication interferes with the parasite's ability to synthesize fatty acids and replicate, eventually leading to its elimination from the host's tissues. Vitamin E succinate is included as a stable form of alpha-tocopherol that supports neurological health by neutralizing free radicals and protecting neuronal cell membranes from oxidative damage during the inflammatory response. Ponazuril is characterized by its ability to cross the blood-brain barrier, allowing it to reach tissues within the central nervous system. Your veterinarian will determine the appropriate application of this combination based on your horse’s weight, the severity of neurological signs and specific results from diagnostic testing.

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.

Commonly observed effects of ponazuril/Vitamin E succinate administration include mild gastrointestinal changes such as loose stools or a temporary decrease in appetite. In some horses, owners may observe localized skin irritation or a transient exacerbation of coordination issues, which is sometimes noted as the body responds to the targeted parasitic life stages. If you observe significant stumbling, persistent diarrhea or signs of an acute allergic reaction like hives, contact your veterinarian promptly.

This medication is typically used with caution in breeding, pregnant or lactating mares, as the safety profile for developing foals is a point of professional consideration. It is essential to ensure the horse remains in a safe, level environment during the initial phase of therapy to prevent injury should coordination shifts occur. Before starting a protocol involving ponazuril/Vitamin E succinate, ensure your veterinarian has a complete history of all other prescriptions and supplements your horse is receiving. Your veterinarian is the right person to design a comprehensive monitoring plan and provide guidance on the necessary duration of use to ensure the management approach remains suitable for your horse's individual health status.