Dosing and Administration

Do you know what dosage your dog needs? If not, your veterinarian can guide you. Explore below to learn about the different dosing sizes available, so your dog can be protected against heartworm disease, hookworms, whipworms, roundworms and tapeworms.

Maximum Efficacy Starts with the Right Dose of Worm Protection

Every dog is unique, and yours is no exception. Finding the right dosage is a first step in making sure that your dog's worm protection is effective. Proper administration is also important because it ensures that Interceptor® Plus (milbemycin oxime/praziquantel) can do its job to its fullest ability, and keep your dog protected.

Dose According to Dog Weight

For maximum efficacy, your dog’s veterinarian must find the right dosage for your dog. We’ve provided you with this easy-to-reference dosage/weight chart so you can see what dosage is right for your dog.

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How to Administer Interceptor Plus

Interceptor Plus has a 96.6% overall acceptability. That means most dogs will take their dose. As a chewable, it's best to administer Interceptor Plus in a manner that encourages your dog to chew, rather than to swallow without chewing. If your dogs normally swallows treats whole, you may break the chewable into pieces and feed them to your dog. Available with a veterinarian's prescription.

Step. 1

Remove 1 Tasty Chewable from its Packaging

Check to make sure that the chewable has not expired, and remove from packaging.

Step. 2

Administer Chewable

Your dog can take the chewable from your hand or with a small amount of food. Just make sure they consume the whole dose.

Step. 3

Check for Complete Ingestion

After your dog has taken the chewable, observe your pet for a few minutes to ensure that no part of the dose is lost or rejected. If you suspect that any of the dose has been lost, redosing is recommended.

Download the Interceptor Plus Label

Check out the Interceptor Plus product label for complete safety information, dosage schedule, storage information and possible side effects.

How to Buy Interceptor Plus

Purchasing Interceptor Plus is easy. Whether you prefer to buy online or through your veterinarian, you can choose the method that works best for you.

Register for Reminders

Get text or email reminders when it’s time to give your dog each monthly dose, or refill their Interceptor Plus prescription.

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Discover our FAQs

Find the answers to your questions about Interceptor Plus.


Interceptor Plus prevents heartworm disease and treats and controls adult roundworm, hookworm, whipworm, and tapeworm infections in dogs and puppies 6 weeks or older and 2 pounds or greater.

Important Safety Information

Treatment with fewer than 6 monthly doses after the last exposure to mosquitoes may not provide complete heartworm prevention. Prior to administration of Interceptor Plus, dogs should be tested for existing heartworm infections. The safety of Interceptor Plus has not been evaluated in dogs used for breeding or in lactating females. The following adverse reactions have been reported in dogs after administration of milbemycin oxime or praziquantel: vomiting, diarrhea, decreased activity, incoordination, weight loss, convulsions, weakness, and salivation. For complete safety information, please see Interceptor Plus product label or ask your veterinarian.

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