Body weight of the animal is the decisive factor in determining the dosage of medication. So, it is advisable to check the weight of the pet prior to administering the medicine. However, the usual dosages that correspond to the body weight are: For cats or kittens of 1.5-1.9 lbs, provide quarter portion of the scored tablet; for 2-3 lbs half the tablet; 4-8 lbs one whole tablet, 9-12.9 lbs one and a half tablets, and for those weighing 13-16 lbs it is advised to give two whole tablets. In no instance shall the medicine be used in animals that are less the 1.5 lbs of weight. The medication can be given with or without food.