A clear yellow to slightly brownish free-flowing non-aqueous solution containing 10 % w/v imidacloprid. The product is presented in a single use plastic tube for cutaneous (spot-on) treatment in dogs, cats and pet rabbits. Each tube contains 0.4 ml (40 mg imidacloprid), 1.0 ml (100 mg imidacloprid), 2.5 ml (250 mg imidacloprid), 4.0 ml (400 mg imidacloprid), 0.4 ml (40 mg imidacloprid), 0.8 ml (80 mg imidacloprid), 0.4 ml (40 mg imidacloprid) and 0.8 ml (80 mg imidacloprid) respectively as listed above. The product also contains 0.1% butylated hydroxytolvene (E321) as a preservative.