Prescribing overview
Panacur formulations have species- and parasite-specific claims; concentrations and regimens are not interchangeable.
Key prescribing checks
- Match the suspected or documented parasite to the product’s label claims and diagnostic findings. A generic dewormer category is not enough to determine suitability.
- The granule label requires complete consumption of medicated food for effectiveness. Record whether the patient actually received the intended prescription.
- For food-producing species, verify the applicable label, production class and withdrawal requirements before use; a canine instruction cannot supply livestock residue guidance.
Uses by species
Approval and evidence apply to the named product, species, route and indication. An extra-label use requires its own prescribing assessment; a human indication is not an animal approval.
Dogs
FDA-approved veterinary labelLabeled roundworms, hookworms, whipworms and Taenia pisiformis
Does not imply treatment of every tapeworm.
Use / indication source ↗Horses
FDA-approved veterinary labelLabeled strongyles, pinworms, ascarids and selected larval strongyles
Regimen depends on parasite stage.
Use / indication source ↗Pharmacology & pharmacokinetics
Mechanism and clinical role
Label attributes antiparasitic action to interference with parasite energy metabolism.
Absorption, distribution, metabolism and elimination
Reviewed labels do not provide numerical species-specific absorption/elimination parameters.
SAFETY REFERENCE · PRODUCT & SPECIES SPECIFIC
Contraindications & cautions
Contraindications identify circumstances where the source says a product should not be used. Precautions call for assessment or monitoring. Interactions identify combinations to review. They are distinct categories; this summary does not replace a full interaction check or the current product label.
Panacur
U.S. granules 22.2% for dogs and only the named carnivorous/omnivorous zoo animals.
Contraindications · when not to use
- The canine section explicitly reports no known contraindications; do not generalize that statement to other species or formulations.
Precautions & monitoring
- Full consumption of medicated food is essential. For listed zoo animals, the label prohibits use during the hunting season or the preceding 14 days.
Panacur Paste
U.S. equine paste 10%.
Contraindications · when not to use
- Food-safety prohibition: do not use in horses intended for human consumption.
Precautions & monitoring
- Dying parasites may release antigens and cause local/systemic hypersensitivity, especially with higher exposure. The repeated regimen for fourth-stage Strongylus vulgaris larvae has not been evaluated for reproductive safety in pregnant mares or stallions. Monitor parasite-treatment effectiveness and resistance.
Panacur Suspension
U.S. horse/cattle oral suspension 10%; production-class restrictions differ from granules/paste.
Contraindications · when not to use
- Do not use in horses intended for human consumption, beef calves under two months, dairy calves or veal calves. The higher beef-cattle-only regimen is prohibited in dairy cattle.
Precautions & monitoring
- Observe milk-discard and cattle slaughter-withdrawal requirements in the full label. No withdrawal period is established for pre-ruminating calves. Ensure complete administration based on current weight; monitor effectiveness and resistance.
Paste and suspension labels lack separate formal contraindication sections; explicit food-safety/production-class prohibitions are identified above. Their absence does not mean no contraindications exist.
Safety sources checked: . Selected label information; independent veterinary or veterinary-pharmacy review remains pending. A label for dogs, cats, horses or humans does not establish safety for another species.
Adverse effects
Vomiting was reported in canine studies; killing equine parasites can provoke hypersensitivity reactions.
These are selected source-reported effects, not incidence estimates or an exhaustive list. Spontaneous postmarketing reports do not by themselves establish frequency or causality.
Dosing & administration
| Species & indication | Labeled regimen | Eligibility & source |
|---|---|---|
| Dogs ≥6 weeks; do not treat sick dogs without veterinary diagnosisLabeled roundworms, hookworms, whipworms and Taenia pisiformisPanacur C 22.2% granules | 50 mg/kg (22.7 mg/lb) Oral in food · Once daily Three consecutive days | Ensure complete consumption; use weight-based packet table. Verify full dosing label ↗ |
| DogsToxocara canis/Toxascaris leonina, Ancylostoma caninum/Uncinaria stenocephala, Trichuris vulpis, Taenia pisiformisPanacur prescription 22.2% granules (222 mg/g) | 50 mg/kg (22.7 mg/lb) Oral in food · Once daily Three consecutive days | Full medicated-food consumption required. Verify full dosing label ↗ |
| Horses not intended for human consumptionLarge/small strongyles and pinwormsPanacur Paste 10% (100 mg/g) | 5 mg/kg (2.3 mg/lb) Oral · Single treatment One administration | Use current body weight. Verify full dosing label ↗ |
| Foals/weanlings <18 months, not for human consumptionAscarids where commonPanacur Paste 10% | 10 mg/kg (4.6 mg/lb) Oral · Single treatment One administration | Confirm actual syringe capacity. Verify full dosing label ↗ |
| Horses not for human consumptionEncysted early/late third- and fourth-stage cyathostomes; fourth-stage Strongylus vulgarisPanacur Paste 10% | 10 mg/kg (4.6 mg/lb) Oral · Once daily Five consecutive days | Repeated S. vulgaris regimen reproductive safety unassessed in pregnant mares/stallions. Verify full dosing label ↗ |
| Horses not for human consumptionLarge/small strongyles and pinworms; ascaridsPanacur Horse & Cattle Suspension 10% (100 mg/mL) | 5 mg/kg for strongyles/pinworms; 10 mg/kg for ascarids Oral · Single treatment One administration | Shake well. Verify full dosing label ↗ |
| Beef and dairy cattle, excluding dairy/veal calves and beef calves <2 monthsLabel-listed lungworms, stomach worms and intestinal wormsPanacur Horse & Cattle Suspension 10% | 5 mg/kg (2.3 mg/lb) Oral · Single treatment One administration | Milk discard 48 hours; slaughter withdrawal eight days after last treatment. Verify full dosing label ↗ |
| Beef cattle only, excluding calves <2 months and veal calvesInhibited fourth-stage Ostertagia ostertagi; Moniezia benedeniPanacur Horse & Cattle Suspension 10% | 10 mg/kg (4.6 mg/lb) Oral · Single treatment One administration | Not for dairy cattle; eight-day slaughter withdrawal. Verify full dosing label ↗ |
Zoo-animal claims require species/parasite-specific label review; no generalized exotic-animal regimen provided.
Extra-label prescribing and food-animal residue requirements are separate from labeled regimens. FDA extra-label-use guidance ↗
Drug & supplement interactions
This is a selected interaction reference, not an automated or comprehensive combination checker. Reconcile prescription drugs, nonprescription products, supplements and recent treatment changes.
Panacur
U.S. granules 22.2% for dogs and only the named carnivorous/omnivorous zoo animals.
- Canine label reports no known drug incompatibilities. Data supporting combination use in listed Felidae/Ursidae are unavailable.
Monitoring
Use diagnostic testing and monitor treatment effectiveness/resistance.
Client counseling
Weigh accurately and complete prescribed treatment; persistent tapeworm segments need reassessment.
This section supports the veterinary team's discharge discussion; it does not replace the product’s Client Information Sheet where one is required.
Storage & handling
Granules: 20–25°C. Paste/suspension: ≤25°C; protect suspension from freezing.
Brands, formulations & ingredient identity
Active ingredients
Fenbendazole
Panacur granules, paste and suspension share fenbendazole but differ in concentration, administration and labeled species. Verify the exact container rather than substituting by brand alone.
The cited granule label includes dogs and selected zoo animals; the equine paste and horse/cattle suspension have their own labels.
Identification of fenbendazole does not prove approval for every exotic animal or every parasite. Extra-label use requires a veterinarian’s species-specific decision.
Shared ingredients do not establish interchangeable concentrations, routes, release properties, species labeling or regional availability.
Panacur
- Formulation
- Oral granules
- Label / product scope
- Dogs
The cited granule label also covers specifically listed zoo animals; do not generalize to all exotics.
Product label / source ↗Panacur Paste
- Formulation
- Oral paste
- Label / product scope
- Horses
Equine formulation with separate label claims.
Product label / source ↗Panacur Suspension
- Formulation
- Oral suspension
- Label / product scope
- Horses · Cattle
Species and production-class restrictions apply; consult the full suspension label.
Product label / source ↗References & review status
Clinical reference updated October 16, 2026. Independent veterinary or veterinary-pharmacy review not yet completed. Evidence gaps remain explicitly identified; this page does not claim equivalence to a comprehensive, professionally reviewed veterinary formulary.