Virbac Ultimum Broad Spectrum Horse Wormer

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Virbac Ultimum® Horse Wormer - Long-Acting Broad-Spectrum Parasite Control

Some worming decisions matter more than others - especially when parasite pressure is high or a horse’s history isn’t clear. Virbac Ultimum® is a long-acting, broad-spectrum horse wormer designed for situations where deeper, longer-lasting control is needed.

Formulated with moxidectin and praziquantel, Ultimum targets a wide range of internal parasites including encysted small strongyles, tapeworms and bots. Its extended Egg Reappearance Period (ERP) of at least 14 weeks helps reduce pasture recontamination, making it a key part of strategic parasite management.

Why Riders Choose Virbac Ultimum

Long-acting protection - extended ERP helps reduce worm egg shedding for up to 14 weeks
Targets encysted small strongyles - parasites not controlled by many standard wormers
Tapeworm & bot control included - praziquantel covers all three tapeworm species
Gold-standard strategic wormer - trusted for resistance-aware programs
Easy oral gel - palatable and simple to administer

When Ultimum Fits Best in a Worming Program

Virbac Ultimum is commonly used when horses need deeper or longer-lasting parasite control, rather than routine maintenance dosing.

It’s often recommended for:

Horses with a suspected burden of encysted small strongyles
High shedders or horses with repeated elevated faecal egg counts
New or recently arrived horses with an unknown worming history
Late summer or autumn dosing, when bots and encysted larvae are a concern

Used correctly, Ultimum plays an important role in reducing reliance on frequent worming while still maintaining strong parasite control.

What Parasites Does Ultimum Control?

Virbac Ultimum provides broad-spectrum control of key equine parasites, including:

Large and small strongyles (including encysted stages)
Tapeworms
Bots
Pinworms
Hairworms

Active Ingredients

Moxidectin – a persistent second-generation mectin targeting encysted larvae
Praziquantel – effective against all tapeworm species

Dosage & How to Use

One syringe treats horses up to 700 kg bodyweight.

Administer orally using the syringe
Ensure the horse’s mouth is free of food before dosing
Place the gel over the back of the tongue
Raise the horse’s head briefly to ensure swallowing

For horses over 700 kg, seek veterinary advice to ensure correct dosing.

Safety & Use in Pregnant Mares

Virbac Ultimum is safe for use in foals over 4 weeks of age, pregnant mares, and breeding stallions when used as directed.

Using Ultimum in Young Horses

For horses under 2 years of age, Ultimum is commonly used as part of a rotation with non-mectin products such as Strategy-T to help manage parasite resistance.

Common Rider Questions (FAQ)

Q: Is Ultimum long-acting?
A: Yes. It has an Egg Reappearance Period of at least 14 weeks, helping reduce pasture contamination.

Q: Is this a routine wormer?
A: Ultimum is best used strategically rather than frequently, especially where encysted strongyles are a concern.

Q: Can I use it on new horses?
A: Yes. Ultimum is often recommended for horses arriving with an unknown worming history.

Why Choose Virbac Ultimum?

Virbac Ultimum is for riders who want more than basic worming - it’s for situations that call for deeper control, longer protection, and smarter resistance management.

Virbac Ultimum®: long-acting parasite control for horses that need a step up.