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Description Sentinel Spectrum Chews is a monthly oral preventive prescription that guards against heartworms adult roundworms adult hookworms whipworms and prevents the development of flea eggs. It protects your dog against heartworm disease and intestinal worms all in a palatable beef-flavored chewable. Precautions Treatment with fewer than 6 monthly doses after the last exposure to mosquitoes may not provide complete heartworm prevention. Prior to administration of Sentinel Spectrum dogs should be tested for existing heartworm infections. At the discretion of the veterinarian infected dogs should be treated to remove adult heartworms. Do not use in puppies less than six weeks of age. Do not use in dogs or puppies less than two pounds of body weight. The safety of this medication has not been evaluated in dogs used for breeding or in lactating females. Not for use in humans. Keep this and all medications out of the reach of children. Recommended Dosage Give as directed by your veterinarian Active Ingredients Storage Instructions Store in a dry place at controlled room temperature between 59 – 77F.