Clear Spot Spot On Solution for Dogs is for the prevention & treatment of flea infestations. With immediate insecticidal effect & persistent insecticidal activity for up to 4 weeks in dogs this product can be used to control Flea Allergy Dermatitis. Dosage: Spot-on use. Animals should be weighed accurately prior to treatment. Dosage & Treatment Schedule Dog (kg bw) Product & number of pipettes needed:4kg Clearspot 40 mg Spot-On Solution For Small Dog Use 1 x 0.4 ml pipette 4 10 25 40kg Clearspot 400 mg Spot-On Solution For Very Large Dogs Use 2 x 4.0 ml pipettes The product shows immediate insecticidal effect & persistent insecticidal activity for up to 4 weeks in dogs. Should re-treatment become necessary earlier than 4 weeks, do not re-treat more frequently than weekly.