Sentinel is a prescription medication used to protect dogs from various parasites. It is available in two forms: Sentinel Flavor Tabs and Sentinel Spectrum Chews. Both forms protect against heartworm disease, hookworms, roundworms, and whipworms. Sentinel Flavor Tabs also prevent flea eggs from hatching, while Sentinel Spectrum Chews also protect against tapeworm infections.

Sentinel is indicated for use in dogs and puppies four weeks of age and older, and two pounds of body weight or greater. The medication is administered orally once a month, and the dosage depends on the dogs weight. Sentinel is generally safe to use, but some dogs may experience mild side effects such as vomiting, lethargy, or diarrhea. If a dog experiences severe side effects, the veterinarian should be contacted immediately.

It is recommended that all dogs be on a heartworm and flea preventative medication year-round for their entire life, as long as the veterinarian recommends it. Sentinel is a preventive medication, so it is unlikely that a dog will show signs or symptoms before the veterinarian prescribes it. Sentinel is a flavored chewable tablet that dogs love, making administration easy and convenient.