Vetdrugs 2.0Imidacloprid is a neonicotinoid insecticide used principally for flea control in dogs and cats. Topical products provide contact activity against susceptible insects, including biting lice in selected canine formulations. Combinations with moxidectin, permethrin or other actives extend coverage through those ingredients’ separate antiparasitic actions.
Group
Neonicotinoid ectoparasiticide
Mechanism of Action
Imidacloprid acts as an agonist at insect nicotinic acetylcholine receptors on postsynaptic membranes. Persistent receptor stimulation disrupts normal neurotransmission and progresses to paralysis and death. Its receptor affinity favors susceptible insects over mammals. Distribution over the skin and coat supports contact activity against fleas, including exposed immature stages in some product settings.
Dose Rates
Dogs
| Use / stage | Dose | Route | Schedule | Instructions |
|---|---|---|---|---|
| Flea and biting-louse control | Reference only | TOPICAL | Once | Do not use in: Unweaned puppies under 8 weeks; Advantage 100 mg spot-on: one 1 mL pipette for dogs weighing at least 4 kg and under 10 kg. One treatment provides flea protection for about 4 weeks. Do not treat unweaned puppies under 8 weeks. |
| Topical flea-control product use | Reference only | TOPICAL | Use the species- and size-matched imidacloprid product, generally monthly. Repeated shampooing can shorten persistence, but do not reapply more often than once weekly under the described instructions. Combination products have their own limits. |
Cats
| Use / stage | Dose | Route | Schedule | Instructions |
|---|---|---|---|---|
| Topical flea-control product use | Reference only | TOPICAL | Use the species- and size-matched imidacloprid product, generally monthly. Repeated shampooing can shorten persistence, but do not reapply more often than once weekly under the described instructions. Combination products have their own limits. |
Indications
- Treatment and prevention of flea infestations in dogs and cats using an indicated product.
- Treatment of canine biting-louse infestations with a product supporting that indication.
- Reduction of flea-associated disease burden as part of a complete flea-allergy dermatitis management plan.
Contraindications
- Hypersensitivity
- Use of permethrin-containing combinations on cats
Adverse effects
- Local irritation
- Salivation after licking
- Occasional gastrointestinal or neurologic signs
Toxicity
Remove excess topical exposure and provide symptomatic care. Permethrin-containing products carry a particular feline poisoning risk.
Preparations
| Preparation | Form | Strength | Route |
|---|---|---|---|
| Advantage 100 mg spot-on for dogs 100 mg per 1 mL pipette for dogs ≥4 to <10 kg. Not a free-volume spray. | Other | 100 mg / mL | TOPICAL |
Monitoring and Administration
Use the complete pipette appropriate for the exact product and weight category. Apply to intact skin and prevent licking until dry.
Single-active Advantage 100 mg/1 mL is for dogs at least 4 kg and under 10 kg. It is not the same product as an imidacloprid/permethrin combination.
Single-active imidacloprid is different from combinations with permethrin or moxidectin. Permethrin combinations are dog-only; moxidectin combinations add heartworm, intestinal parasite or mite indications that cannot be attributed to imidacloprid alone.
The historical single-active product limits were puppies at least 7 weeks and kittens at least 8 weeks, while the separately verified Advantage presentation has its own age wording. Use the actual product limit. Prevent oral exposure and flush accidental eye contact promptly.