 It is used as part of an overall weight control program that also includes proper diet and exercise, under the supervision of a veterinarian.Side effects may include vomiting, diarrhea, lethargy, drooling, or uncoordination.Allergic reaction to the medication may include, facial swelling, hives, scratching, sudden onset of diarrhea, vomiting, shock, seizures, pale gums, cold limbs, or coma.