Vivaldis Vi-Fi Forte (Fipronil + (S)-Methoprene) Tick, Flea & Lice Spot-On Solution for Dogs

Active Composition & Biological Mechanism of Action

• Fipronil (9.8% w/v): A broad-spectrum phenylpyrazole that blocks GABA-gated and glutamate-gated chloride channels in insect nerve cells. This causes uncontrolled nervous hyperexcitation and death in adult fleas, ticks, and lice.

• (S)-Methoprene (8.8% w/v): An insect juvenile hormone mimic (IGR) that penetrates newly laid flea eggs and prevents larval emergence and pupal maturation.

• Translocation: The solution spreads naturally across the dog's skin sebum layer within 24 hours and is stored in sebaceous glands, steadily replenishing the coat and skin surface over 30 days.

Coverage & Parasite Targets

Parasite TargetLife Stage AffectedClinical ActionFleas (Ctenocephalides spp.)Adult fleas, eggs, larvae, and pupaeKills adults; halts hatch rate and egg maturationTicks (Rhipicephalus, Ixodes, Dermacentor)Adult ticks & nymphsDestroys ticks on contact to reduce tick fever riskChewing Lice (Trichodectes canis)Adults & nymphsRapidly clears biting and chewing lice infestationsFlea Allergy Dermatitis (FAD)Secondary dermatitisManages flea bite hypersensitivity by stopping bites

Available Weight Band Variants

Variant NameDog Weight RangePipette VolumeCommon Breed ExamplesSmall (Yellow)Up to 10 kg0.67 mlShih Tzu, Pug, Pomeranian, Lhasa ApsoMedium (Purple)10 – 20 kg1.34 mlBeagle, Cocker Spaniel, Medium IndieLarge (Pink/Red)20 – 40 kg2.68 mlLabrador, Golden Retriever, Boxer, IndieExtra Large (Blue)40 – 60 kg4.02 mlGerman Shepherd, Rottweiler, Great Dane

Selection Tip: Always weigh your dog prior to selection. Use the entire pipette designated for your dog's exact weight category.

Application Instructions

1. Preparation: Hold the pipette upright facing away from your face and snap off the tip along the pre-scored line.

2. Part the Fur: Part your dog's fur between the shoulder blades at the base of the neck until the bare skin is clearly visible.

3. Apply Directly: Place the pipette tip against the skin and squeeze firmly to apply the full contents in a single spot (for large dogs over 20 kg, apply across 2–3 spots along the midline of the back).

4. Drying Window: Allow the solution to dry naturally. Avoid touching the application site until dry, and keep treated dogs separated from other household pets for 2–4 hours.

5. Water Restriction: Do not bathe or shampoo your dog 48 hours prior to or 48 hours after application.

Safety Warnings & Precautions

• Canine Use Only: Do not use on cats. Fipronil/S-Methoprene dog formulations are toxic to felines due to differing metabolic rates.

• Minimum Age: Safe for puppies and dogs aged 8 weeks and older (weighing at least 2 kg).

• Skin Health: Apply only to intact skin; do not use over open wounds, lacerations, or irritated hot spots.

• Flammable: Keep pipette away from heat sources and open flames during application.

• Storage: Store below 30°C in a dry place protected from direct heat and light. Keep out of reach of children and household pets.