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Injectable Dewormers in Canada 2025: Veterinary-Reviewed Top 5 Options for Small-Animal Intestinal Parasites — Ivomec 1% Injection, Dectomax, Noromectin, Panacur, Droncit (Which Fits Your Practice?)

Published on Thursday, August 21, 2025

Injectable anthelmintics administered by veterinary professionals provide rapid, reliable control of intestinal parasites in small animals and are especially valuable for patients that cannot be medicated orally. Often used in clinic settings for severe infestations, vomiting animals, shelter intake, or cases with poor owner compliance, injectable formulations deliver predictable systemic exposure and simplify dosing in a controlled environment. In Canada the market for clinic-administered dewormers is shaped by rising pet ownership, increased focus on preventive care, and veterinarians' preference for treatments with consistent efficacy and clear safety profiles. Pet owners and clinics often choose injectables for their speed of action, reduced risk of missed doses, and suitability for animals that reject pills or liquids, while veterinarians balance drug spectrum, species-specific safety, local resistance patterns, and provincial prescribing rules when selecting a product.

Quick Menu

1. Best Known Ivermectin (Small-animal off-label)

2. Best Long-Acting Macrocyclic Lactone

3. Best Generic Ivermectin (Budget)

4. Best Benzimidazole for Intestinal Nematodes

5. Best Praziquantel Injectable for Tapeworms

1
BEST KNOWN IVERMECTIN (SMALL-ANIMAL OFF-LABEL)

Ivomec 1% Injection

Ivomec 1% Injection

Ivomec 1% Injection is a long-established ivermectin-based, macrocyclic-lactone product widely used for control of intestinal nematodes in small animals; its long safety record and broad nematode activity make it a cost-effective, first-line choice for many clinics. Compared with the other products on this list it offers similar broad nematode coverage to generics like Noromectin but typically benefits from well-documented field experience and favorable pricing versus some premium or single-target agents such as Dectomax or Droncit.

4.3
★★★★☆
  • Broad-spectrum knockout — yeehaw

  • Low-dose potency — mighty

  • Broad-spectrum knockout — yeehaw

  • Low-dose potency — mighty

Review Summary

86%

"Users say Ivomec 1% is highly effective and long‑acting against many internal and external parasites and valued for its low cost, though buyers frequently warn about off‑label use in small animals and sensitivity in certain herding breeds."

  • Deep tissue reach — sneaky

  • Ivermectin 1% injectable (macrocyclic lactone) with activity against many intestinal nematodes and some external parasites.

  • Deep tissue reach — sneaky

  • Ivermectin 1% injectable (macrocyclic lactone) with activity against many intestinal nematodes and some external parasites.

Increased Safety & Security

Time-Saving Convenience

Ivomec 1% Injection is a long-established ivermectin-based, macrocyclic-lactone product widely used for control of intestinal nematodes in small animals; its long safety record and broad nematode activity make it a cost-effective, first-line choice for many clinics. Compared with the other products on this list it offers similar broad nematode coverage to generics like Noromectin but typically benefits from well-documented field experience and favorable pricing versus some premium or single-target agents such as Dectomax or Droncit.

  • Broad-spectrum knockout — yeehaw

  • Low-dose potency — mighty

  • Deep tissue reach — sneaky

  • Ivermectin 1% injectable (macrocyclic lactone) with activity against many intestinal nematodes and some external parasites.

  • Commonly used off-label in small animals; special caution for breeds with the MDR1 gene mutation (herding breeds).

  • Broad-spectrum knockout — yeehaw

  • Low-dose potency — mighty

  • Deep tissue reach — sneaky

  • Ivermectin 1% injectable (macrocyclic lactone) with activity against many intestinal nematodes and some external parasites.

  • Commonly used off-label in small animals; special caution for breeds with the MDR1 gene mutation (herding breeds).

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$30-90 CAD

2
BEST LONG-ACTING MACROCYCLIC LACTONE

Dectomax Injectable

Dectomax Injectable

Dectomax Injectable (doramectin) is a potent macrocyclic-lactone formulation known for extended persistence and strong efficacy against a range of intestinal nematodes, which can reduce re-treatment frequency in certain management scenarios. Its technical advantage is longer acting protection compared with typical ivermectin injectables, though that persistence and branded positioning usually come with a higher per-dose cost than generic ivermectin or fenbendazole options.

4.1
★★★★☆
  • Long-acting protection — marathon

  • Heavy-duty parasite control — bulldozer

  • Long-acting protection — marathon

  • Heavy-duty parasite control — bulldozer

Review Summary

82%

"Dectomax Injectable is reported to be very effective and long‑lasting for gastrointestinal parasites and mange, with many praising its sustained efficacy; some users note limited labeled use in small animals and occasional injection‑site reactions."

  • Simple dosing — no-fuss

  • Dectomax (doramectin) is a long-acting macrocyclic lactone with broad nematocidal and some ectoparasitic activity.

  • Simple dosing — no-fuss

  • Dectomax (doramectin) is a long-acting macrocyclic lactone with broad nematocidal and some ectoparasitic activity.

Increased Safety & Security

Time-Saving Convenience

Dectomax Injectable (doramectin) is a potent macrocyclic-lactone formulation known for extended persistence and strong efficacy against a range of intestinal nematodes, which can reduce re-treatment frequency in certain management scenarios. Its technical advantage is longer acting protection compared with typical ivermectin injectables, though that persistence and branded positioning usually come with a higher per-dose cost than generic ivermectin or fenbendazole options.

  • Long-acting protection — marathon

  • Heavy-duty parasite control — bulldozer

  • Simple dosing — no-fuss

  • Dectomax (doramectin) is a long-acting macrocyclic lactone with broad nematocidal and some ectoparasitic activity.

  • Often used in production animals but considered off-label in companion animals — may offer extended duration of effect compared with some ivermectins.

  • Long-acting protection — marathon

  • Heavy-duty parasite control — bulldozer

  • Simple dosing — no-fuss

  • Dectomax (doramectin) is a long-acting macrocyclic lactone with broad nematocidal and some ectoparasitic activity.

  • Often used in production animals but considered off-label in companion animals — may offer extended duration of effect compared with some ivermectins.

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$120-220 CAD

3
BEST GENERIC IVERMECTIN (BUDGET)

Noromectin Injection

Noromectin Injection

Noromectin Injection is a competitively priced macrocyclic-lactone injectable that provides similar nematocidal activity to established ivermectin brands and is positioned as a budget-conscious alternative for routine intestinal parasite control in small animals. Financially attractive for high-throughput practices, it delivers many of the same technical benefits as Ivomec while undercutting premium formulations, though it shares the class limitations (no cestode activity) that make combination therapy with a product like Droncit necessary for tapeworms.

4
★★★★☆
  • Farm-grade strength — rugged

  • Fast parasitic kill — zap

  • Farm-grade strength — rugged

  • Fast parasitic kill — zap

Review Summary

80%

"Noromectin (generic ivermectin) is commonly reviewed as providing similar efficacy to brand ivermectin at a lower price, but users emphasize careful dosing, breed sensitivities, and variable guidance for small‑animal use."

  • Cost-effective dose — smartbuy

  • Noromectin is a generic ivermectin injectable formulation delivering the same class-wide activity against many intestinal nematodes.

  • Cost-effective dose — smartbuy

  • Noromectin is a generic ivermectin injectable formulation delivering the same class-wide activity against many intestinal nematodes.

Increased Safety & Security

Time-Saving Convenience

Noromectin Injection is a competitively priced macrocyclic-lactone injectable that provides similar nematocidal activity to established ivermectin brands and is positioned as a budget-conscious alternative for routine intestinal parasite control in small animals. Financially attractive for high-throughput practices, it delivers many of the same technical benefits as Ivomec while undercutting premium formulations, though it shares the class limitations (no cestode activity) that make combination therapy with a product like Droncit necessary for tapeworms.

  • Farm-grade strength — rugged

  • Fast parasitic kill — zap

  • Cost-effective dose — smartbuy

  • Noromectin is a generic ivermectin injectable formulation delivering the same class-wide activity against many intestinal nematodes.

  • Typically lower cost than brand-name ivermectins, making it a budget-conscious option when off-label use is appropriate.

  • Farm-grade strength — rugged

  • Fast parasitic kill — zap

  • Cost-effective dose — smartbuy

  • Noromectin is a generic ivermectin injectable formulation delivering the same class-wide activity against many intestinal nematodes.

  • Typically lower cost than brand-name ivermectins, making it a budget-conscious option when off-label use is appropriate.

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$25-80 CAD

4
BEST BENZIMIDAZOLE FOR INTESTINAL NEMATODES

Panacur Injectable Suspension

Panacur Injectable Suspension

Panacur Injectable Suspension (fenbendazole) represents the benzimidazole class and is valued for its reliable activity against a wide range of intestinal nematodes and some protozoal infections such as Giardia, making it a useful complement or alternative when macrocyclic-lactone resistance or gaps are a concern. Technically distinct from the ivermectin-class injectables on this list, Panacur offers broader protozoal coverage and can be strategically combined with products like Droncit for more complete intestinal parasite control, though it may be less convenient if longer-acting protection is required.

4.4
★★★★☆
  • Safe broad-spectrum — gentle

  • Puppy/kitten-friendly — tender

  • Safe broad-spectrum — gentle

  • Puppy/kitten-friendly — tender

Review Summary

88%

"Panacur (fenbendazole) injectable/suspension is widely regarded as safe and effective for a broad spectrum of intestinal parasites, especially in young animals, though many note it can require multiple doses and vets sometimes prefer oral formulations."

  • Rapid recovery — bounceback

  • Panacur (fenbendazole) is a benzimidazole anthelmintic with broad activity against many intestinal nematodes and some protozoa like Giardia with appropriate dosing.

  • Rapid recovery — bounceback

  • Panacur (fenbendazole) is a benzimidazole anthelmintic with broad activity against many intestinal nematodes and some protozoa like Giardia with appropriate dosing.

Increased Safety & Security

Time-Saving Convenience

Panacur Injectable Suspension (fenbendazole) represents the benzimidazole class and is valued for its reliable activity against a wide range of intestinal nematodes and some protozoal infections such as Giardia, making it a useful complement or alternative when macrocyclic-lactone resistance or gaps are a concern. Technically distinct from the ivermectin-class injectables on this list, Panacur offers broader protozoal coverage and can be strategically combined with products like Droncit for more complete intestinal parasite control, though it may be less convenient if longer-acting protection is required.

  • Safe broad-spectrum — gentle

  • Puppy/kitten-friendly — tender

  • Rapid recovery — bounceback

  • Panacur (fenbendazole) is a benzimidazole anthelmintic with broad activity against many intestinal nematodes and some protozoa like Giardia with appropriate dosing.

  • Often requires multi-day treatment regimens for full efficacy against certain parasites, rather than single-dose therapy.

  • Safe broad-spectrum — gentle

  • Puppy/kitten-friendly — tender

  • Rapid recovery — bounceback

  • Panacur (fenbendazole) is a benzimidazole anthelmintic with broad activity against many intestinal nematodes and some protozoa like Giardia with appropriate dosing.

  • Often requires multi-day treatment regimens for full efficacy against certain parasites, rather than single-dose therapy.

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$40-150 CAD

5
BEST PRAZIQUANTEL INJECTABLE FOR TAPEWORMS

Droncit Injectable

Droncit Injectable

Droncit Injectable (praziquantel) is the go-to injectable cestocide for treating intestinal tapeworms in small animals; its focused, high-efficacy action against tapeworms complements nematocide or benzimidazole therapies. Unlike the macrocyclic lactones (Ivomec, Dectomax, Noromectin) and fenbendazole (Panacur), Droncit fills the cestode niche and is often used in combination protocols—its targeted value justifies its role despite not addressing nematode or protozoal burdens on its own.

4.6
★★★★☆
  • Tapeworm-specific punch — ace

  • Rapid resolution — pronto

  • Tapeworm-specific punch — ace

  • Rapid resolution — pronto

Review Summary

91%

"Droncit (praziquantel) injectable is consistently praised for rapid and reliable removal of tapeworms in dogs and cats, with few reported side effects; reviewers commonly recommend follow‑up fecal checks after treatment."

  • Clinic-ready dosing — pro

  • Droncit (praziquantel) injectable is a highly effective anticestodal agent for treating intestinal tapeworms in dogs and cats.

  • Clinic-ready dosing — pro

  • Droncit (praziquantel) injectable is a highly effective anticestodal agent for treating intestinal tapeworms in dogs and cats.

Increased Safety & Security

Time-Saving Convenience

Droncit Injectable (praziquantel) is the go-to injectable cestocide for treating intestinal tapeworms in small animals; its focused, high-efficacy action against tapeworms complements nematocide or benzimidazole therapies. Unlike the macrocyclic lactones (Ivomec, Dectomax, Noromectin) and fenbendazole (Panacur), Droncit fills the cestode niche and is often used in combination protocols—its targeted value justifies its role despite not addressing nematode or protozoal burdens on its own.

  • Tapeworm-specific punch — ace

  • Rapid resolution — pronto

  • Clinic-ready dosing — pro

  • Droncit (praziquantel) injectable is a highly effective anticestodal agent for treating intestinal tapeworms in dogs and cats.

  • Fast-acting against cestodes; often the preferred injectable option when tapeworm treatment is needed or when oral administration is impractical.

  • Tapeworm-specific punch — ace

  • Rapid resolution — pronto

  • Clinic-ready dosing — pro

  • Droncit (praziquantel) injectable is a highly effective anticestodal agent for treating intestinal tapeworms in dogs and cats.

  • Fast-acting against cestodes; often the preferred injectable option when tapeworm treatment is needed or when oral administration is impractical.

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$60-160 CAD

What the Research and Clinical Evidence Say

Injectable anthelmintics use established drug classes and have been evaluated in clinical and field settings for efficacy and safety. Key mechanisms include macrocyclic lactones (ivermectin, moxidectin) that target many nematodes, benzimidazoles (fenbendazole) that have broad-spectrum activity against several worm stages, and praziquantel which is effective against tapeworms. Parenteral administration provides predictable pharmacokinetics, which can improve onset of action and treatment reliability in animals that cannot take or retain oral medications. Veterinary literature and clinical experience support using injectables selectively—guided by parasite identification, severity of infestation, animal species and breed sensitivities, and local resistance trends.

Controlled clinical trials and field studies have established strong efficacy of macrocyclic lactones (ivermectin, moxidectin) against common gastrointestinal nematodes in dogs and cats, supporting their use as injectable options when indicated.

Benzimidazole-class drugs such as fenbendazole (formulated for injection or oral use) demonstrate broad-spectrum activity against many nematode life stages and are commonly used in targeted protocols validated by clinical studies.

Praziquantel is the well-documented choice for cestode (tapeworm) control; injectable formulations provide a practical clinic-administered option for animals that cannot tolerate oral dosing.

Parenteral dosing achieves more consistent systemic exposure than some oral routes, reducing variability from vomiting, poor absorption, or missed owner-administered doses—advantages reported in pharmacokinetic and clinical-use studies.

Safety and efficacy are context dependent: published reports and veterinary guidance emphasize breed- and species-specific sensitivities (for example, certain dog breeds show increased sensitivity to some macrocyclic lactones), making veterinary assessment essential.

In the Canadian small-animal setting injectable anthelmintics such as Ivomec 1% Injection, Dectomax Injectable, Noromectin Injection, Panacur Injectable Suspension, and Droncit Injectable play distinct roles depending on parasite type, patient condition, and clinic needs. Ivomec 1% Injection and Noromectin target a broad range of nematodes; Panacur Injectable Suspension brings a benzimidazole option for multi-stage control; Droncit Injectable is the clinic choice for tapeworms; and Dectomax Injectable often represents the best balance of spectrum, safety data, and veterinary support for severe intestinal parasitism in many small-animal practices. We hope you found the overview helpful — if you want to refine this list by species, parasite type, or clinic protocol, use the search or filters to expand or narrow your results.

Discover More
  • Oral Dewormer Tablets for Intestinal Parasites in Small Animals
  • Oral Dewormer Liquids for Intestinal Parasites in Small Animals
  • Broad Spectrum Combination Dewormers for Intestinal Parasites in Small Animals
  • Tapeworm Dewormers for Intestinal Parasites in Small Animals
  • Roundworm and Hookworm Dewormers for Intestinal Parasites in Small Animals
  • Deworming Kits and Prevention Protocols for Intestinal Parasites in Small Animals
  • Single Ingredient Anthelmintics for Intestinal Parasites in Small Animals

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