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Sentinel Spectrum Chews for Dogs 50.1-100 lbs

$77.99 $97.81 Save $19.82

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Prescription Required

Merck Animal Health SKU: 609754-MER Barcode: 814514020245

Size (Count): 6 Chewables

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Monthly protection against six common parasites

Product Description

Sentinel Spectrum Chews for Dogs 50.1–100 lbs provide broad-spectrum parasite protection in a tasty, easy-to-administer chew. Formulated with milbemycin oxime, lufenuron, and praziquantel, it prevents heartworm disease, controls flea populations by breaking their lifecycle, and treats intestinal parasites, including roundworms, hookworms, whipworms, and tapeworms.

Benefits

  • Complete parasite protection: Defends dogs against six major parasites, including heartworm, roundworm, hookworm, whipworm, tapeworm, and immature fleas.
  • Breaks flea lifecycle: Prevents flea eggs from hatching and maturing, effectively stopping future flea infestations.
  • Tasty chew formulation: The beef and bacon flavor makes dosing enjoyable and easy for dogs to accept monthly.
  • Safe for puppies: Proven safe for puppies as young as six weeks and weighing at least two pounds.
  • Once-a-month dosing: Simple monthly administration with food ensures consistent, reliable parasite protection.

Variants

  • Sentinel Spectrum Chews for Dogs 2–8 lbs
  • Sentinel Spectrum Chews for Dogs 8.1–25 lbs
  • Sentinel Spectrum Chews for Dogs 25.1–50 lbs
  • Sentinel Spectrum Chews for Dogs 50.1–100 lbs

Ingredients

Composition Table

Ingredient Quantity (per chew)
Milbemycin oxime 23.0 mg
Lufenuron 460 mg
Praziquantel 228 mg

Other Ingredients

Beef and bacon flavoring, stabilizers, and excipients.

How to Use

Recommended-Dosage Chart

Dog Weight Range Milbemycin Oxime (mg) Lufenuron (mg) Praziquantel (mg) Number of Chews
2 – 8 lbs 2.3 mg 46 mg 22.8 mg 1 chew per month
8.1 – 25 lbs 5.75 mg 115 mg 57 mg 1 chew per month
25.1 – 50 lbs 11.5 mg 230 mg 114 mg 1 chew per month
50.1 – 100 lbs 23.0 mg 460 mg 228 mg 1 chew per month
Over 100 lbs — — — Appropriate combination of chews


Disclaimer: This dosage information is provided by the manufacturer. Always consult your veterinarian before administering or adjusting any supplement for your pet.

Dosage & Administration Instructions

  • Monthly administration: Give Sentinel Spectrum Chews once every month for continuous parasite protection.
  • With a meal: Always administer the chew during or immediately after a normal meal to ensure proper absorption.
  • Heartworm prevention: Continue monthly dosing for at least six months after the last mosquito exposure period.
  • Dogs over 100 lbs: Administer an appropriate combination of chews to match your dog’s weight accurately.
  • Proper ingestion: Observe your dog after dosing to ensure the full chew is consumed without being dropped or spit out.
  • Flea management: Treat all pets in the household for fleas to prevent reinfestation.

Additional Information

Precautions

  • Heartworm testing: Dogs should be tested for existing heartworm infections before starting Sentinel Spectrum Chews.
  • Age and weight limit: Do not use in puppies under six weeks or dogs weighing less than two pounds.
  • Breeding and lactation: Safety in breeding or lactating dogs has not been fully evaluated for this product.
  • Human safety: Not for use in humans; always keep out of reach of children.
  • Complete flea control: Treat all pets in the household for fleas to prevent reinfestation.

Possible Side Effects

  • Digestive upset: Vomiting or diarrhea may occur occasionally after administration.
  • Neurological signs: Transient ataxia, tremors, or salivation may appear at higher-than-recommended doses.
  • Allergic reactions: Rarely, labored breathing, hypersalivation, or lethargy can occur in dogs with high microfilarial counts.

Storage Information

  • Temperature range: Store at room temperature between 59°F and 77°F (15°C to 25°C).
  • Storage conditions: Keep in a dry place and protect from moisture to maintain product integrity.

Shipping & Return

We offer ground, express, priority, and international delivery; see our shipping policy for details.

For return instructions or product concerns, please refer to our detailed refund policy. 

Prescription items are NON-RETURNABLE and NON-REFUNDABLE.

Frequently Asked Questions

Q1: What parasites does Sentinel Spectrum Chews protect against?

Ans: Sentinel Spectrum Chews protect dogs against heartworms, roundworms, hookworms, whipworms, tapeworms, and immature fleas. This monthly chew provides complete, broad-spectrum parasite protection for dogs and puppies weighing 50.1–100 lbs.

Q2: How often should Sentinel Spectrum Chews be given?

Ans: Give one chew by mouth every month with or immediately after a meal for best absorption. Consistent monthly dosing ensures continuous protection against heartworms, fleas, and intestinal parasites throughout the year.

Q3: Can puppies take Sentinel Spectrum Chews?

Ans: Yes, puppies can safely take Sentinel Spectrum Chews if they are at least six weeks old and weigh over two pounds. Always consult your veterinarian before starting any preventive parasite treatment.

Q4: Does Sentinel Spectrum Chews kill adult fleas?

Ans: No, Sentinel Spectrum Chews prevent flea eggs from hatching but do not kill adult fleas. For complete flea control, pair this product with an approved adult flea treatment as recommended by your veterinarian.

Q5: How should Sentinel Spectrum Chews be stored?

Ans: Store Sentinel Spectrum Chews in a dry place at room temperature between 59°F and 77°F (15°C to 25°C). Keep out of reach of children and pets.