Seresto Collar for Large Dogs Over 18 lbs ( Over 8 Kg)

Description

Seresto Collar for Large Dogs Over 18 lbs ( Over 8 Kg) measuring 70 cm delivers 8 months of continuous flea and tick protection through a patented polymer matrix that releases imidacloprid 100 mg/g and flumethrin 45 mg/g at sustained low concentrations across the full coat surface. The 70 cm length is calibrated for dogs above 8 kg, providing adequate coverage area for larger neck circumferences while maintaining consistent active ingredient contact with the skin. One collar per dog, fitted at the start of the protection cycle and replaced at the 8-month mark.

Recommended for

Dogs over 18 lbs (over 8 kg) from 7 weeks of age.

Indication/Coverage

For dogs presenting with, or at ongoing risk from, mixed parasitic infestations:

• Flea treatment (Ctenocephalides spp., all stages): Kills adult fleas on contact from the point of collar application, with efficacy sustained across the full 8-month period.
• Flea prevention (Ctenocephalides spp.): Suppresses larval flea development in the dog’s immediate environment by depositing active residues onto surrounding surfaces, reducing reinfestation pressure.
• Flea allergy dermatitis (FAD): Addresses the flea infestation underlying FAD; dogs with established FAD and ongoing allergic sensitivity should be evaluated by a veterinarian alongside parasite control.
• Tick control: Kills and repels ticks across all three active life stages for 8 months; newly attaching ticks are killed and detach within 24 to 48 hours without completing a blood meal, as a rule.
• Lice treatment (infestation): Controls lice infestations in dogs for 8 months following a single collar fitting.

Key Benefits

The following properties are derived directly from the Seresto label and apply specifically to the 70 cm variant for dogs over 8 kg:

• Eligible from 7 weeks: Dogs at least 7 weeks of age and confirmed above 8 kg body weight at the time of fitting fall within the labeled parameters for this collar size.
• Dual-active ingredient formulation: Imidacloprid (neonicotinoid class) disrupts flea nicotinic acetylcholine receptors; flumethrin (pyrethroid class) kills and repels ticks through sodium channel interference, delivering coverage across two distinct parasite classes.
• Contact-based kill, no blood meal required: Both active ingredients act on parasites via direct skin and coat contact rather than through systemic absorption, which means ticks do not need to feed before being affected.
• Immediate flea onset: Flea kill begins upon collar application with no delay period, and the prevention of new tick infestations is established from the same point.
• 8-month sustained release: The polymer matrix continuously replenishes active ingredient levels on the coat, eliminating the compliance gap associated with monthly-interval treatments.
• All tick life stages covered: Efficacy extends to larval, nymphal, and adult tick stages, which is clinically relevant in areas where immature tick stages constitute the primary infestation risk.
• Collar format for handling-resistant dogs: Large dogs that resist monthly spot-on application or refuse oral doses can maintain uninterrupted parasite control without repeated handling events.
• Seasonal shedding self-correction: During periods of heavy coat shedding, active ingredient levels on the coat may transiently decline; the collar matrix replenishes the deficit automatically without requiring replacement or additional treatment.

Caution

Hazards to Humans

Keep out of reach of children. Avoid ingestion; swallowing the collar or prolonged skin contact may cause damage to the skin and liver. Do not eat, drink, or smoke while handling the collar or the treated animal. Wash hands thoroughly with cold water and soap after each contact with the product.

Hazards to Domestic Animals

For external use on dogs only. Do not apply to dogs under 7 weeks of age or to dogs weighing 8 kg or less at the time of fitting; this collar length and active ingredient load are outside the labeled dosage for the small dog variant. Dogs that are debilitated, geriatric, pregnant, or lactating should be assessed by a veterinarian before collar application. Localised skin sensitivity at the collar site occurs rarely. Do not use concurrently with other insecticide products; the label explicitly prohibits combination insecticide use.

Possible Side Effects

Observe your dog attentively during the first several days after collar application, as any initial reactions to imidacloprid or flumethrin are most likely to manifest within this period.

Adverse effects reported with Seresto are organised below by presentation category:

• Dermal reactions (collar site): Pruritus, erythema, and localised hair loss at or near the collar contact area occur rarely and typically resolve within 1 to 2 weeks without collar removal. Temporary removal may be warranted if reactions are pronounced.
• Inflammatory skin reactions: Dermatitis, inflammation, eczema, or lesions at the application site have been documented in very rare cases; collar removal is indicated when these presentations occur.
• Gastrointestinal and behavioural signs: Salivation, vomiting, diarrhoea, and changes in appetite have been reported rarely in the initial days post-fitting, potentially linked to collar licking or ingestion of surface residues.
• Systemic behavioural changes: Transient depression or altered behaviour has been observed in rare instances and is expected to resolve without intervention.

Remove the collar and consult a veterinarian if any reaction persists or worsens following application.