The Closantel Base is effective for treating worms found in pigs, cattle, sheep, dogs, and other animals. Also, this dewormer is useful for veterinary use against roundworms, myiases, and flukes. It is an antiparasitic active ingredient injected, drench or mixed with other anthelmintics to work against internal and external parasites of livestock. The base has purity, stable composition and effectiveness against parasites. It is processed with correct chemical quantities by advanced methodology. Closantel Base should be given to the patient in the proper quantity. The base is insoluble in water and soluble in dimethylformamide & acetone. It has a melting point within the range of 210 to 225 °C.