Prescribing overview
Interceptor Plus combines heartworm prevention with intestinal parasite control.
Key prescribing checks
- Confirm label age and weight eligibility and establish heartworm testing status before initiation. A preventive chew is not an adult-heartworm treatment protocol.
- The label describes reactions related to dying microfilariae in infected dogs. Existing infection therefore requires clinical assessment rather than routine dispensing assumptions.
- Review reproductive status and any prior antiparasitic intolerance using the complete prescribing information.
- Document complete consumption, missed administrations and suspected gastrointestinal or neurologic changes; the prescriber determines how protection is restored.
Uses by species
Approval and evidence apply to the named product, species, route and indication. An extra-label use requires its own prescribing assessment; a human indication is not an animal approval.
Dogs
FDA-approved veterinary labelHeartworm prevention; labeled roundworms, hookworm, whipworm and tapeworms
At least 6 weeks and 2 lb.
Use / indication source ↗Pharmacology & pharmacokinetics
Mechanism and clinical role
Milbemycin is a macrocyclic anthelmintic; praziquantel is an isoquinolone anthelmintic.
Absorption, distribution, metabolism and elimination
Species-specific kinetic values are not supplied in this summary.
SAFETY REFERENCE · PRODUCT & SPECIES SPECIFIC
Contraindications & cautions
Contraindications identify circumstances where the source says a product should not be used. Precautions call for assessment or monitoring. Interactions identify combinations to review. They are distinct categories; this summary does not replace a full interaction check or the current product label.
Interceptor Plus
Dogs; oral chewable combination
Contraindications · when not to use
- The label reports no known contraindications.
Precautions & monitoring
- Do not use below six weeks or two pounds. Test for heartworms; high microfilarial burdens can cause reactions. Breeding/lactation safety is unevaluated.
Safety sources checked: . Selected label information; independent veterinary or veterinary-pharmacy review remains pending. A label for dogs, cats, horses or humans does not establish safety for another species.
Adverse effects
GI signs, lethargy and neurologic signs have been reported; microfilarial death can cause reactions.
These are selected source-reported effects, not incidence estimates or an exhaustive list. Spontaneous postmarketing reports do not by themselves establish frequency or causality.
Dosing & administration
| Species & indication | Labeled regimen | Eligibility & source |
|---|---|---|
| Dogs ≥6 weeks and ≥2 lbHeartworm prevention and labeled intestinal parasite controlInterceptor Plus chewables | Minimum 0.5 mg/kg milbemycin oxime plus 5 mg/kg praziquantel Oral · Monthly Year-round, or through at least 6 months after last mosquito exposure | Ensure entire dose is consumed. Verify full dosing label ↗ |
Use exact weight-band chewables; start within one month of first seasonal mosquito exposure.
Extra-label prescribing and food-animal residue requirements are separate from labeled regimens. FDA extra-label-use guidance ↗
Drug & supplement interactions
This is a selected interaction reference, not an automated or comprehensive combination checker. Reconcile prescription drugs, nonprescription products, supplements and recent treatment changes.
A product-specific interaction summary has not been established here. An empty list must not be interpreted as “no interactions.” Review the full source and a species-appropriate clinical reference.
Monitoring
Test for heartworm before initiation; confirm full consumption.
Client counseling
Encourage chewing; discuss a lost or missed dose promptly. This is not adult-heartworm treatment.
This section supports the veterinary team's discharge discussion; it does not replace the product’s Client Information Sheet where one is required.
Storage & handling
Keep securely in labeled packaging.
Brands, formulations & ingredient identity
Active ingredients
milbemycin oxime · praziquantel
Other searchable names: milbemycin oxime praziquantel
Interceptor Plus contains milbemycin oxime and praziquantel. Do not shorten the record to Interceptor and assume that every product with that brand root has identical ingredients.
This is not the same combination as Heartgard Plus. Both being preventives does not establish matching ingredients, coverage or substitution instructions.
The U.S. product is a canine chewable with weight-range packages. Ingredient searches should return the combination while keeping each active component visible.
Shared ingredients do not establish interchangeable concentrations, routes, release properties, species labeling or regional availability.
Interceptor Plus
- Formulation
- Oral chewable tablets
- Label / product scope
- Dogs
Milbemycin oxime plus praziquantel; canine combination product.
Product label / source ↗References & review status
Clinical reference updated October 16, 2026. Independent veterinary or veterinary-pharmacy review not yet completed. Evidence gaps remain explicitly identified; this page does not claim equivalence to a comprehensive, professionally reviewed veterinary formulary.
Search another medication or supplement →