Bot fly larvae burrow into your horse’s stomach lining, causing ulcers, colic, and poor nutrient absorption — a stealthy threat that single-dose ivermectin paste targets directly. Without a targeted bot control strategy, these parasites reduce your horse’s condition and overall well-being over time.
I’m Mo Mahin — the founder and writer behind Furric. I study equine parasitology data, compare active-ingredient concentrations and dosing mechanisms across paste formulations, and analyze aggregated owner feedback to identify which bot-specific wormers actually deliver on their label claims.
This guide breaks down the five leading ivermectin pastes for horses, comparing palatability, dosing accuracy, and multi-pack value so you can confidently choose the best dewormer for bots in horses for your barn’s rotation schedule.
How To Choose The Best Dewormer For Bots In Horses
Bot larvae — the parasitic stage of the Gasterophilus fly — are one of the most resilient internal parasites horses face. Selecting the right paste requires understanding three key factors: active ingredient concentration, dosing precision per pound of body weight, and the formulation’s palatability to avoid spit-out doses.
Ivermectin Concentration and Bot Efficacy
Only macrocyclic lactones like ivermectin eliminate both adult bots and migrating larval stages in a single oral dose. Look for a labeled 1.87% ivermectin paste — this concentration delivers 0.2 mg per kg of body weight when dosed according to the plunger markings. Anything lower than 1.87% may leave the bot burden intact after treatment.
Weight-Based Dosing Accuracy
Every 6.08-gram syringe treats a horse up to 1250 lbs when the plunger is set to the correct weight notch. A paste with clear, bold weight markings on the barrel reduces the chance of administering a sub-therapeutic dose — which contributes to resistance — or an excessive dose that could cause transient digestive upset.
Palatability and Gel Consistency
Apple-flavored pastes improve voluntary acceptance, but the base gel texture matters for complete expulsion from the syringe and retention in the horse’s mouth. Some pastes use a thick ointment-like yellow base while others have a lighter white lotion consistency — both deliver identical ivermectin, but the firmer base tends to stay in the mouth better for anxious horses.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Durvet Duramectin 3-Pack | Premium | Established brand with reliable bot kill | 6.08g Syringe × 3 | Amazon |
| CLENVIA 3-Pack | Mid-Range | Calibrated syringe with clear markings | 6.08g Syringe × 3 | Amazon |
| VITAL VINE Ivermectin 3-Pack | Mid-Range | Budget-friendly multi-pack for regular rotation | 6.08g Syringe × 3 | Amazon |
| BVMDPW 6-Pack | Premium | Larger supply for multi-horse barns | 0.21oz Syringe × 6 | Amazon |
| Durvet Ivermectin Paste Single | Budget | Entry-level single-dose bot treatment | 6.08g Single Syringe | Amazon |
In‑Depth Reviews
1. Durvet Duramectin Equine Wormer Paste – 3 Tubes
Durvet’s Duramectin is the most established ivermectin paste on this list, with a track record dating back nearly a decade in the equine market. The 3-tube format provides three full 6.08g doses, each one delivering 1.87% active ingredient capable of knocking out both adult bot larvae and the arterial stages of Strongylus vulgaris in a single administration.
Owners consistently praise the consistent white, lotion-like paste that extrudes smoothly from the plunger and holds together once inside the horse’s mouth — reducing the chance of the horse spitting half the dose onto the stall floor. The syringe weight markings are printed directly into the barrel plastic rather than on a sticker, so they don’t wear off after storage in the tack room.
For barns that rotate dewormers based on fecal egg counts, this is the reliable baseline product to compare all others against. The tube fits standard dispensing guns, and the plunger cap prevents accidental dose loss between uses.
Why we love it
- Proven single-dose bot elimination with S. vulgaris coverage
- Durable molded weight markings that won’t fade
- Consistent white base paste that horses accept readily
Good to know
- No official apple flavor listed — some horses may resist if used to flavored pastes
- Priced slightly higher per tube than generic 3-packs
2. CLENVIA Ivermectin Paste 1.87% – 3-Pack
CLENVIA stands out for its focus on dosing precision — each 6.08g syringe in this 3-pack features clear weight markings in increments that make it easy to dial in the exact dose for horses between 250 and 1250 lbs. The apple-flavored gel base is designed to improve voluntary acceptance, which is critical for horses that have become suspicious of pasty oral medications after repeated deworming events.
Multiple owner reviews note that the gel has a sticky, yellowish ointment-like consistency rather than the creamy white lotion base found in Durvet’s Duramectin. This thicker texture actually helps the paste cling to the back of the tongue and cheek pouch, reducing the likelihood that the horse can immediately expel the dose. The 3-pack format gives barn managers three treatments in a single purchase, covering a full rotation cycle for a single horse or dosing three horses simultaneously.
Each syringe comes with a plunger-based applicator and a separate cap for storage between uses, though owners recommend using the entire dose in one sitting to avoid paste drying inside the syringe tip.
Why we love it
- Clear weight markings for precise 250-lb increments
- Sticky gel base helps keep the dose in the horse’s mouth
- Apple flavor improves acceptance for fussy horses
Good to know
- Yellow ointment base is messier than white paste if spilled
- Some horses may notice the different texture versus previous brands
3. VITAL VINE Ivermectin 1.87% Paste – 3-Pack
VITAL VINE offers one of the most budget-conscious entry points into the 3-pack ivermectin paste category without sacrificing the 1.87% concentration needed for effective bot control. Each 6.08g syringe treats the standard 1250-lb horse, and the apple flavor is listed on the label — though owner feedback suggests the taste profile is less consistent than premium brands, with some horses rejecting it outright.
The paste consistency leans toward a thinner gel compared to the CLENVIA and Durvet options, which can make it easier to squeeze out but also slightly harder to keep in the horse’s mouth if the animal is prone to head-shaking during administration. The plunger weight markings are printed clearly on the barrel, though some users have reported the markings rub off if the syringe is stored in humid conditions.
For barns on a strict deworming rotation schedule that dose multiple horses each cycle, the per-syringe cost savings of this 3-pack add up quickly. It’s a practical choice for owners who prioritize affordability and are experienced enough with paste administration to manage a thinner gel.
Why we love it
- Lowest per-syringe cost among 3-pack options
- Apple flavor listed for improved acceptance
- Full 1250-lb dose capacity per tube
Good to know
- Thinner gel consistency may dribble out of the horse’s mouth
- Plunger markings can wear off in humid storage
4. BVMDPW Ivermectin Horse Dewormer Paste – 6-Pack
BVMDPW’s 6-pack is the highest-volume offering in this comparison, giving barns with multiple horses enough single-dose ivermectin syringes to cover an entire rotation without reordering. Each 0.21 oz (6.08 g) syringe is individually sealed, which keeps the paste fresh and prevents the drying-out problem that can affect opened multi-packs stored for weeks between doses.
Owner feedback highlights that the paste texture is firm and well-aged — meaning it hasn’t separated or turned runny during storage — though the apple flavor intensity varies from tube to tube, which can be a problem if you’re dosing a notoriously picky horse that has learned to identify and refuse a specific taste. Some users have flagged inconsistent packaging quality, with the outer box appearing to be printed on a standard inkjet printer, which raises questions about overall quality control for this brand.
For barn managers who deworm on a strict 8-week rotation and have horses ranging from 500 to 1250 lbs, the ability to grab individual sealed syringes from the bulk pack is a significant convenience improvement over opening a 3-pack and storing partially used tubes.
Why we love it
- 6 individually sealed syringes for freshness
- Firm, well-aged paste consistency
- Single dose eliminates bots and S. vulgaris
Good to know
- Inconsistent apple flavor between tubes
- Packaging quality concerns from some buyers
5. Durvet Ivermectin Paste Dewormer – Single Syringe
This single-tube entry from Durvet is the most straightforward entry point into the bot-deworming market — one 6.08g syringe of 1.87% ivermectin paste, apple-flavored, and ready to dose a horse up to 1250 lbs. It’s the same active ingredient concentration as the multi-packs, making it a no-commitment trial option for owners who want to test how their horse responds to ivermectin before buying a larger supply.
The paste has a thick red-tinted appearance that matches the classic Durvet branding, and the single-dose format eliminates the waste that occurs when a multi-pack syringe is opened, partially used, and then stored incorrectly. Owner reviews over nearly two decades of availability consistently confirm that a single tube does exactly what the label claims — removes worms and bots with one dose.
For owners of a single horse who deworm only once or twice per year based on fecal egg count results, buying individual syringes rather than a multi-pack avoids the risk of paste expiring before you need the next dose. The apple flavor is a standard inclusion here, though some horses have rejected it due to the slightly medicinal undertone of the ivermectin base.
Why we love it
- Low upfront cost for first-time bot treatment trial
- No waste from partially used multi-pack syringes
- Decades-long market presence with verified bot efficacy
Good to know
- Single-tube format costs more per dose than bulk packs
- Apple flavor may not mask ivermectin taste for picky horses
FAQ
How often should I deworm my horse for bots with ivermectin paste?
Can I use the same syringe to dose two horses that weigh different amounts?
Why does the ivermectin paste have a yellow base instead of a white base?
Does apple-flavored ivermectin paste work better for bots than unflavored paste?
Can I refrigerate a partially used syringe to use later?
Final Thoughts: The Verdict
For most barns, the dewormer for bots in horses winner is the Durvet Duramectin 3-Pack because it combines proven bot and S. vulgaris elimination with durable weight markings and a trustworthy white paste consistency. If you want apple-flavored gel with a sticky base that stays in the horse’s mouth, grab the CLENVIA 3-Pack. And for barns with multiple horses needing bulk supply, nothing beats the BVMDPW 6-Pack for convenience and individual syringe freshness.