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  • Sentinel® Spectrum® is a highly palatable artificial beef-flavored chewable tablet that provides broad spectrum parasite protection.

Sentinel® Spectrum® Chewables


*Prescription Required: Vetsource®, our pharmacy provider, may need to contact your veterinary hospital for prescription verification.

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Product Information

Sentinel® Spectrum® is a once-a-month chewable tablet that contains a combination of milbeycin oxime, praziquantel, and lufenuron to prevent and control fleas, heartworm and intestinal worms in dogs. Milbemycin oxime interferes with nerve transmission and helps protect against heartworm, roundworm, hookworm, and whipworm. Praziquantel causes muscle spasms and kills tapeworms. Lufenuron is an insect growth regulator, which is used to control fleas by breaking the flea lifecycle in both the egg and larval stages.

Active Ingredients

milbeycin oxime, lufenuron, praziquantel

Side Effects

Side effects may include vomiting, depression/lethargy, itching, hives, diarrhea, loss of appetite, clogged pores, loss of muscle coordination, rapid and uncontrollable shaking, salivation, and weakness. Notify your veterinarian if side effects appear and remain troublesome.

Other side effects may occur, if you notice anything unusual, contact your veterinarian.

Developed For


Product Benefits

Sentinel® Spectrum® is a highly palatable artificial beef-flavored chewable tablet that provides broad spectrum parasite protection.

Usage Guidelines

Give either during or immediately after the consumption of a meal and ensure that the entire dose is consumed by your pet. May be given directly or broken into smaller pieces and mixed with food.


Dogs should be tested for adult heartworms and treated if necessary before starting Sentinel® Spectrum®. This product does not treat adult heartworms and can cause a shock-like reaction in heartworm positive dogs. Do not use on dogs under 6 weeks of age and weighing under 2 lbs. The safety of Sentinel® Spectrum® has not been evaluated in breeding or nursing females. Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.

Allergic reactions to medications may occur. Be sure to inform VetSource and your veterinarian if your pet has any known drug sensitivities or allergies. If your pet displays symptoms of an allergic reaction, call your veterinarian immediately or go to a veterinary emergency clinic. Symptoms may include but are not limited to: swollen lips, tongue, face, airways; difficulty breathing; agitation; profuse salivation; vomiting; widespread hives and itching.