Choosing the right pour-on cattle wormer is essential for maintaining herd health and productivity. This guide highlights leading pour-on parasiticides with clear product details, helping you compare actives, coverage, and application notes. The selections below focus on products that address a broad spectrum of internal and external parasites and are suitable for beef and dairy cattle. Use this overview to inform discussions with your veterinarian and ensure proper dosing and withdrawal considerations for your operation.
Summary of chosen products:
- Elanco Cydectin Pour-On Cattle Parasiticide (1L) — Moxidectin-based, treats internal and external parasites.
- Durvet Ivermectin Pour-On for Cattle (1000 mL) — Broad-spectrum ivermectin solution.
- Elanco Cydectin Pour-On Cattle Parasiticide (2.5L) — Higher volume, same broad-spectrum efficacy.
- CyLence Pour-On Insecticide — Fly and lice control with ready-to-use convenience.
- Atticus Gardatis Pour-On Insecticide with IGR — Dual-action insecticide with IGR for sustained control.
Elanco Cydectin Pour-On Cattle Parasiticide (1L) — Broad Parasite Control

Elanco Cydectin Pour-On is a ready-to-use parasiticide formulated for beef and dairy cattle. It targets a wide range of internal parasites and many larval stages, including brown stomach worms and lungworms, while providing control for external pests such as horn flies, lice, cattle grubs, and mites. The active ingredient is moxidectin, offering a weatherproof formula with a purple dye that helps visually identify treated cattle. This combination supports effective parasite management across multiple seasons and cattle ages, with noticeable convenience for producers seeking a streamlined pour-on regimen.
Key features:
– Effective parasiticide for internal and external parasites
– Controls 13 internal parasite species and several larval stages
– External parasite control for horn flies, lice, grubs, and mites
– Active ingredient: Moxidectin; weatherproof with visibility dye
Durvet Ivermectin Pour-On for Cattle (1000 mL) — Ivermectin Solution

Durvet Ivermectin Pour-On for Cattle provides broad-spectrum parasite control with a straightforward pour-on application. The product’s strength lies in its ivermectin active ingredient, delivering efficacy against a wide range of internal parasites and external pests. This option is well-regarded for its ease of use and effectiveness in managing common cattle parasites in beef and dairy herds, supporting health and productivity with a simple dosing approach.
Key features:
– Broad-spectrum ivermectin pour-on for cattle
– Simple application suitable for large herds
– Focused on internal parasites and selected external pests
– Labeled for typical beef and dairy management scenarios
Elanco Cydectin Pour-On Cattle Parasiticide (2.5L) — Expanded Coverage

This larger-volume version of Cydectin Pour-On maintains the same comprehensive parasite-control profile as the 1L formulation, making it a practical option for larger herds or frequent treatment schedules. The product targets internal parasites and a broad range of external pests, offering reliable performance in beef and dairy contexts. The moxidectin-based formula remains weatherproof, and producers benefit from the same visible treatment indicator dye to verify coverage across cattle groups.
Key features:
– Expanded volume for larger herds
– Broad-spectrum internal and external parasite control
– Weatherproof formulation with visible treatment dye
– Active ingredient: Moxidectin, a Milbemycin family dewormer
CyLence Pour-On Insecticide (1 Pint) — Flies and Lice Control

CyLence Pour-On Insecticide provides targeted control of face flies, horn flies, and both biting and sucking lice on beef and dairy cattle. It is designed for ready-to-use application with minimal preparation, making it a convenient option for on-farm parasite management. The product is suitable for use across cattle of varying ages and sizes, and is compatible with standard pour-on routines during any season of the year as directed on the label.
Key features:
– Controls flies and lice on cattle
– Ready-to-use, minimal preparation required
– Suitable for beef and dairy cattle of all ages
– Year-round applicability as directed
Atticus Gardatis Pour-On Insecticide with IGR (0.5 Gal) — Dual-Action Protection

Gardatis Pour-On combines a powerful insecticide with an insect growth regulator (IGR) to deliver robust control of flies and lice on cattle and horses. The product’s dual-active formula targets adult insects while disrupting their breeding cycle, which can reduce reinfestation rates over time. The ready-to-use pour-on format supports efficient administration across herds, with guidance on use for lactating cattle and horses. This option is useful for producers seeking both immediate and longer-term insect-pest suppression.
Key features:
– 5.0% permethrin and 3.0% diflubenzuron IGR combo
– Controls multiple lice species and various flies
– Ready-to-use pour-on applicable to cattle and horses
– Effective year-round use per label directions
Buying Guide: Key Purchase Considerations for Pour-On Cattle Wormers
- Target parasite spectrum: Review product labels for internal parasite coverage (worms, roundworms, lungworms) and external pests (flies, lice, ticks). Choose a product that matches your herd’s risk profile and regional parasite pressures.
- Active ingredient and resistance management: Consider the active ingredient (e.g., moxidectin, ivermectin, permethrin with IGR) and rotate chemistries to reduce resistance development. Consult a veterinarian to align with your herd’s parasite load history.
- Herd size and dosing strategy: Larger herds may benefit from higher-volume formulations to reduce handling time. Confirm dosing directions for cattle weight ranges and lactation status to ensure efficacy and safety.
- Application readiness: Ready-to-use pour-on formulas save labor time and minimize preparation errors. Evaluate whether you need a product with a visible dye or a specific applicator compatibility for your operation.
- Seasonality and regional considerations: Some products are suitable year-round, while others may have seasonal recommendations. Ensure your choice aligns with climate, pasture management, and parasite life cycles in your region.
- Withdrawal and milk/beef withholding: Adhere to label instructions regarding meat and milk withdrawal periods to maintain food-safety compliance. Keep records of treatments and animal IDs for traceability.
- Safety and handling: Check environmental considerations, protective equipment recommendations, and storage requirements. Some products offer weatherproof formulations for rugged field conditions.
- Integration with integrated parasite management: Use pour-on products as part of a broader program, including pasture rotation, biosecurity, and monitoring via fecal egg counts or necropsy data as advised by a veterinarian.
In selecting a pour-on cattle wormer, producers should balance the breadth of parasite coverage, ease of use, herd size, and management goals. The products highlighted here provide options across 1 L to 2.5 L volumes, with additional emphasis on fly and lice control where appropriate. Always refer to the product label for exact dosing instructions, species-specific guidance, and safety precautions before use.