Field Notes on a Smarter Cattle Drench: Triclabendazole + Levamisole Oral Suspension

In a season where fluke risk is climbing and lungworm keeps ambushing herds after unexpected rain, the most asked-for Cattle Medicine in my notebook is a dual-action oral suspension built for real-world conditions. I’ve walked a few barns and, to be honest, the appetite for combination anthelmintics is rising because single-actives are getting outsmarted by resistance patterns.

What it is, in plain terms

Product: Triclabendazole and Levamisole Oral Suspension, manufactured in the South District of Shangzhuang Industry Zone, Shijiazhuang, Hebei, China. Each milliliter contains Triclabendazole 120 mg and Levamisole 75 mg. It targets fluke (Fasciola hepatica) across all stages that are susceptible to triclabendazole, plus a broad spectrum of gastrointestinal nematodes and Dictyocaulus in the lungs that are susceptible to levamisole. Actually, that dual coverage is the point.

Quick technical specs

How it’s made and verified

• Materials: API-grade triclabendazole and levamisole HCl; pharm-grade suspending agents, wetting agents, and solvents.
• Methods: Wet milling for particle-size control, high-shear homogenization, in-line de-aeration, closed-loop mixing.
• Testing standards: HPLC potency and related substances (per Ph. Eur./Chinese Veterinary Pharmacopoeia methods, USP alignment); microbial limits; viscosity; sedimentation test.
• Stability: ICH/VICH climate zones per VICH GL3 (accelerated + long-term) to support shelf life claims.
• Service life: Designed for routine farm dosing cycles over multiple seasons, with shake-to-redisperse behavior validated.

Where it fits on farm

Use cases: pre-housing clean-outs, post-rain lungworm spikes, fluke-prone pastures, and mixed-burden situations in dairy and beef herds. Many customers say they pick this when they need fluke plus nematode control without juggling two doses. Field teams report fecal egg count reduction (FECR) around 96–99% in susceptible nematodes, with fluke clearance consistent with triclabendazole literature—your mileage may vary by burden and resistance profile.

Vendor comparison (what buyers actually ask me)

Customization and real-world feedback

Private-label options, alternate carton languages, and dosing gun compatibility are common requests. One ranch manager told me the suspension “pours clean and doesn’t cake,” which sounds trivial but saves minutes per pen. Another noted fewer retreatments mid-season after switching, which tracks with the dual-active logic. If you’re benchmarking Cattle Medicine for fluke hot spots, this product is usually shortlisted.

Compliance and safety notes

Manufacturing aligns with GMP principles; potency confirmed by HPLC; efficacy monitored by WAAVP-aligned FECR tests in field programs. Observe local withdrawal periods and MRL rules, especially for milk. Always dose by accurate body weight and follow your veterinarian’s advice. For resistant Ostertagia inhibited larvae, combination may not address arrested stages—manage pasture and rotation accordingly.

Industry trend I’m watching

Combination anthelmintics are moving from “nice to have” to standard, particularly where fluke overlaps with lungworm risk. Surprisingly, more dairy units now schedule annual fluke mapping with coproantigen tests to time treatments rather than blanket dosing—better for efficacy and stewardship of Cattle Medicine classes overall.

References

1. VICH GL3(R) Stability testing of new veterinary drug substances and medicinal products. EMA/VICH, latest revision.
2. Coles GC et al. WAAVP methods for the detection of anthelmintic resistance in nematodes of veterinary importance. Veterinary Parasitology, 1992.
3. EMA CVMP: Triclabendazole-containing products (e.g., Fasinex) assessment reports and SPCs, European Medicines Agency.
4. FAO/WHO JECFA evaluation of Triclabendazole: toxicological and residue considerations; Codex MRLs for veterinary drugs in foods.