Spot-on Parasite Formulation Using Cyclic Carbonate Solvents

The patent introduces a specific formulation system comprising aliphatic cyclic carbonate, aromatic alcohol, and sorbitan monolaurate as intermediary components. This formulation system acts as a mediator between the active substances (neonicotinoids and pyrethroids) and the animal skin, enabling effective delivery of high amounts of active ingredients while reducing direct skin irritation and minimizing systemic absorption through safer dermal penetration characteristics

The patent changes the chemical parameters of the solvent system by replacing conventional solvents (N-methylpyrrolidone and dimethyl sulfoxide) with a novel combination of aliphatic cyclic carbonate, aromatic alcohol, and sorbitan monolaurate. This parameter change maintains the necessary solubility for high concentrations of neonicotinoids and pyrethroids while fundamentally altering the penetration and toxicity profile to reduce systemic absorption and associated harmful effects

The patent merges two distinct active substance classes (neonicotinoids and pyrethroids) into a single spot-on formulation, creating a synergistic combination that simultaneously addresses flea and tick control. This combination approach integrates the high flea activity of neonicotinoids with the broad-spectrum efficacy of pyrethroids, overcoming the limitations of single-active formulations while maintaining practical applicability

The patent creates a universal spot-on formulation that performs multiple functions: it maintains the high flea activity provided by neonicotinoids while adding tick control capability through pyrethroids. The formulated combination enables a single application to address multiple parasitic threats (fleas and ticks), transforming a flea-specific treatment into a multi-functional parasitic control solution