A clear yellowish to brownish, non-aqueous solution containing imidacloprid and permethrin. The product is presented in a single use plastic tube for dermal (spot-on) treatment in dogs. Each tube contains 0.4ml (40 mg imidacloprid, 200 mg permethrin), 1.0 ml (100 mg imidacloprid, 500 mg permethrin), 2.5 ml (250 mg imidacloprid, 1250 mg permethrin) and 4 ml (400 mg imidacloprid, 2000 mg permethrin) respectively, as listed above. The product also contains 0.1% w/v butylated hydroxytoluene (Ph Eur) as a preservative