This prescription medication requires a current annual visit to a Penny Paws clinic. We also require a current annual heartworm test for canine medication containing heartworm preventive.

Get 35% Off Interceptor on all sizes, use code: 35OFFINTERCEPTOR at check out

All 6-month doses are out of stock  (Dogs 2-10#, Dogs- 11-25#, Dogs- 26-50#, Dogs- 51-100#)


What is Interceptor? 

The palatable once-a-month tablet that prevents heartworm disease, controls adult hookworm, and removes and controls adult roundworm and whipworm infections in dogs and puppies. Interceptor requires a prescription from your Penny Paws veterinarian.

Rebates available here. 

Indications: INTERCEPTOR Flavor Tabs are indicated for use in the prevention of heartworm disease caused by Dirofilaria immitis, the control of adult Ancylostoma caninum (hookworm), and the removal and control of adult Toxocara canis and Toxascaris leonina (roundworms) and Trichuris vulpis (whipworm) infections in dogs and in puppies four weeks of age or greater and two pounds body weight or greater.

Dosage: INTERCEPTOR Flavor Tabs are given orally, once a month, at the recommended minimum dosage rate of 0.23 mg milbemycin oxime per pound of body weight (0.5 mg/kg).


Body Weight

2–10 lbs.                One tablet (2.3 mg)
11–25 lbs.              One tablet (5.75 mg)
26–50 lbs.              One tablet (11.5 mg)
51–100 lbs.            One tablet  (23.0 mg)
Dogs over 100 Ibs. are provided the appropriate combination of tablets.

Administration: INTERCEPTOR Flavor Tabs are palatable and most dogs will consume the tablet willingly when offered by the owner. As an alternative, the dual-purpose tablet may be offered in food or administered as other tablet medications. Watch the dog closely following dosing to be sure the entire dose has been consumed. If it is not entirely consumed, re-administer once with the full recommended dose as soon as possible.

INTERCEPTOR Flavor Tabs must be administered monthly, preferably on the same date each month. 

Adverse Reactions: The following adverse reactions have been reported following the use of INTERCEPTOR Flavor Tabs: Depression/lethargy, vomiting, ataxia, anorexia, diarrhea, convulsions, weakness and hypersalivation.

Efficacy: INTERCEPTOR Flavor Tabs eliminate the tissue stage of heartworm larvae and the adult stage of hookworm (Ancylostoma caninum), roundworms (Toxocara canis, Toxascaris leonina) and whipworm (Trichuris vulpis) infestations when administered orally according to the recommended dosage schedule. The anthelmintic activity of milbemycin oxime is believed to be a result of interference with invertebrate neurotransmission.

Safety: Milbemycin oxime has been tested safely in over 75 different breeds of dogs, including collies, pregnant females, breeding males and females, and puppies over two weeks of age.

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