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Roxee Medication Guide

Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg

Medication reference facts with explicit FDA-approval, off-label, source-limited, and safety context. Roxee does not sell, prescribe, or dispense medications.

Both Reference complete FDA data linked Rx required Chewable tablet Virbac AH, Inc Official label facts Owner quick guide first
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Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg

Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg

Drug type: Generic ingredient • Generic profile • No FDA branded products linked

Both Chewable tablet Rx required 100% reference complete

Species: Both

Manufacturer: Virbac AH, Inc

Medication Snapshot

Merged from the current Roxee medication system with field-level provenance, freshness, and completeness tracking.

Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg

Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for 1 month (30 days) after infection and for the treatment and control of roundworm ( Toxocara canis, Toxascaris leonine ), hookworm ( Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense ) and tapeworm ( Dipylidium caninum, Taenia pisiformis ) infections. For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for a month (30 days) after infection and for the treatment and control of roundworms ( Toxocara canis, Toxascaris leonina ), hookworms ( Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense ), and tapeworms ( Dipylidium caninum, Taenia pisiformis ). Species commonly shown: Both, Dog.

Generic name
Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg
Brand names
Iverhart Max®, IVERHART MAX® Chew
Manufacturer
Virbac AH, Inc
Species
Both, Dog
Dosage forms
Chewable tablet, Tablet (Chewable), Chewable Tablets
Prescription
Prescription required
Completeness
100%
Validation
Needs review
Brand names
Iverhart Max® IVERHART MAX® Chew
Dosage forms
Chewable tablet Tablet (Chewable) Chewable Tablets

Indications / Uses

Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for 1 month (30 days) after infection and for the treatment and control of roundworm ( Toxocara canis , Toxascaris leonine ), hookworm ( Ancylostoma caninum , Uncinaria stenocephala , Ancylostoma braziliense ) and tapeworm ( Dipylidium caninum , Taenia pisiformis ) infections. For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for a month (30 days) after infection and for the treatment and control of roundworms ( Toxocara canis , Toxascaris leonina ), hookworms ( Ancylostoma caninum , Uncinaria stenocephala , Ancylostoma braziliense ), and tapeworms ( Dipylidium caninum , Taenia pisiformis ).

Warnings / Contraindications

For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.

  • For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.

Side Effects

Top reported reactions (openFDA): INEFFECTIVE, HEARTWORM LARVAE, Vomiting, Drug dose omission, Drug dose administration interval too long, Overdose, Lethargy (see also Central nervous system depression in 'Neurological').

FAQ

Both, Dog

Yes. Roxee shows this as prescription-only.

Chewable tablet, Tablet (Chewable), Chewable Tablets

Related Conditions

Heartworm Disease

Source Transparency

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Pet Owner Quick Guide

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Used for:

For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for a month (30 days) after infection and for the treatment and control of roundworms ( Toxo...

Dosing note:

Exact dosing depends on your pet's species, weight, and health status. Use your veterinarian's instructions for the exact dose and schedule.

What to watch for:

  • For oral use in dogs only
  • IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older
  • For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets
  • Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian
  • trouble breathing (1 reports)
  • Elevated cholesterol (1 reports)

When to call the vet:

  • Repeated vomiting or diarrhea.
  • Severe lethargy (hard to wake, very low energy).
  • Collapse or fainting.
  • Facial swelling or hives.
  • Blood in vomit or stool.

Regulatory restrictions are shown in Vet View.

Bloodwork changes are grouped in Vet View.

What to tell or ask your vet today:

  • Is this medicine the right fit for my pet’s current symptoms?
  • Which warning signs mean I should call back right away?
  • How should I handle missed doses or refusal to take the medicine?

Next actions

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Research brief

Medication Research Insights

A source-aware map of what to know, what is uncertain, and what to verify with your veterinarian.

Source Backed Signals

What to know

Evidence-backed context Limited

Roxee has limited cited overview evidence for Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg; use the official documents and your veterinarian's instructions for product-specific decisions.

Source: openFDA case USA-USFDACVM-2025-US-070682
Safety signal coverage Reported signals

32 tracked reaction signals; 32 reported cases; 28 serious reports; 2 species groups. These are reporting and label-derived signals for interpretation with a veterinarian.

Source: openFDA case USA-USFDACVM-2025-US-070682
Interpretation guardrail Not causation

Adverse-event reports help form a watch list, but they do not prove the medication caused the reaction and they are not a risk ranking between medications.

Evidence tension

Stronger signal Label / review

Official labels, package inserts, and reviewed summaries carry more weight than isolated reports.

Source: openFDA case USA-USFDACVM-2025-US-070682
Weaker signal Reported data

Case reports and openFDA terms are useful for pattern awareness, but they are incomplete, can include multiple exposures, and do not estimate an individual pet's probability of harm.

Reaction signal map

Most reported reactions Top terms

Trouble breathing (dyspnea) (1 reports), Elevated creatinine (1 reports), Elevated cholesterol (1 reports), Elevated alanine aminotransferase (1 reports), Dysphoria (1 reports)

Body systems represented Signal grouping

Digestive (3), Skin & allergy (1), Behavior (2), Other (26)

Species and breed lens

Species represented in reports Species lens

Dog (20 reports), Cat (12 reports)

What your vet may verify

Fit for this patient Vet check

Verify whether Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg fits the pet's species, current diagnosis, age, weight, organ status, pregnancy/lactation status, and concurrent medications.

Evidence limitations Evidence review

Separate label-backed warnings from adverse-event reports and owner observations before changing the plan.

What to watch next

Watch list Owner-safe

For oral use in dogs only, IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older, For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets, Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian, trouble breathing

Call sooner if Escalation

Repeated vomiting or diarrhea. Severe lethargy (hard to wake, very low energy). Collapse or fainting.

Bottom line: Use this Ivermectin 272Mcg, Pyrantel Pamoate 228Mg, Praziquantel 228Mg brief as a structured watch list and source map, not as a reason to start, stop, or change treatment without your veterinarian.
Vet source depth
  1. openFDA case USA-USFDACVM-2025-US-070682 · adverse_reaction · adverse reactions
  2. Contraindication source · fda_animal_drugs · warnings contraindications
  3. FDA application profile · official_label · quick facts
  4. FDA application profile · official_label · quick facts
  5. Medication usage source · fda_animal_drugs · quick facts
  6. FOI · document · documents
  7. SPL · document · documents
  8. FOI · document · documents

Evidence

Review status / Updated / Sources

Review status: Clinical reviewer not listed

Updated: April 25, 2026, 10:09 AM UTC

Sources:
Safety & side effects

Side effects to monitor:

  • For oral use in dogs only
  • IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older
  • For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets
  • Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian
  • trouble breathing

Most reported reactions:

  • Trouble breathing (dyspnea) (1 reports)
  • Elevated creatinine (1 reports)
  • Elevated cholesterol (1 reports)

Emergency warning signs:

  • Repeated vomiting or diarrhea.
  • Severe lethargy (hard to wake, very low energy).
  • Collapse or fainting.
  • Facial swelling or hives.
Talk to a Vet / Find a Vet Near You Start Symptom Intake

Vet Fast Scan

Source-backed clinical checkpoints for quick review.

FDA-labeled species
Dog
Indication / use
For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for a month (30 days) after infection and for the t…
Form / route / dose
Form: Chewable Tablets, Tablet (Chewable)
Route: Oral
Confirm product label and patient-specific plan.
Warnings
  • High: For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs ov…
Adverse-event caveat
No stored openFDA case explorer rows are linked yet.
Source docs

Quick Facts

Official label facts first, then secondary summaries. Marketing content is separated below.

Species: Both
Manufacturer: Virbac AH, Inc
Form: Chewable Tablets, Tablet (Chewable)
Identifiers:
NADA: 141257 NADA: 141441 NDC Package: 51311-504-02 NDC Package: 51311-505-04 NDC Package: 51311-506-06 NDC Package: 51311-507-08 NDC Product: 51311
Source metadata:

Warnings / Contraindications

For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.

  • High: For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.
Source metadata:

Adverse Reactions

Snapshot first, detailed rows second. This section summarizes signal data and is not a diagnosis.

Tap or hover a reaction to see what it means in plain language.

Tracked signals
32
Reported cases
32
Serious reports
28
Species represented
2
Grouped by Body System
Digestive (3) · Loss of appetite, Drooling, Diarrhea Skin & allergy (1) · Alopecia NOS Behavior (2) · Behavioral disorder (unspecified), Aggression Other (26) · Trouble breathing (dyspnea), Elevated creatinine, Elevated cholesterol
Most Reported Reactions
Reaction Body system Cases Species Serious cases
Other 1 Dog 1
Other 1 Cat 1
Other 1 Dog 1
Other 1 Dog 1
Other 1 Cat 1
Other 1 Cat 1
Other 1 Dog 1
Other 1 Cat 1

Species coverage: Dog (20) Cat (12)

View detailed reaction table
Reaction Body system Species Seriousness Frequency Reports
Other Dog Serious - 1
Digestive Dog Non-serious - 1
Other Cat Serious - 1
Other Dog Serious - 1
Other Dog Serious - 1
Other Cat Serious - 1
Digestive Dog Non-serious - 1
Other Cat Serious - 1
Digestive Dog Non-serious - 1
Other Dog Serious - 1
Other Cat Serious - 1
Other Cat Serious - 1
Other Dog Serious - 1
Other Cat Serious - 1
Other Dog Non-serious - 1
Other Dog Serious - 1
Other Dog Serious - 1
Other Dog Serious - 1
Other Dog Serious - 1
Other Dog Serious - 1
Other Cat Serious - 1
Other Cat Serious - 1
Other Cat Serious - 1
Behavior Cat Serious - 1
Other Dog Serious - 1
Other Dog Serious - 1
Skin & allergy Dog Serious - 1
Behavior Dog Serious - 1
Other Dog Serious - 1
Other Dog Serious - 1
Other Cat Serious - 1
Other Cat Serious - 1
Source metadata:

Source Documents

The most useful source links appear first; full previews and metadata stay in the veterinary/professional layer.

Use original documents to confirm product-specific warnings, ingredients, and handling details with your veterinarian.

IVERHART MAX® Chew SPL · SPL Iverhart Max® SPL · SPL IVERHART MAX Chew SPL SPL · Structured Product Label

Full source previews and metadata remain in the veterinary/professional layer.

Owner handouts

0
No owner handouts linked yet.

Official label / PI

0
No official label or package insert links yet.

SPL

3

FOI

3

IVERHART MAX® Chew

SPL · SPL

Open original
FDA Structured Product Label

IVERHART MAX® Chew

Rendered from Roxee's cached FDA SPL package contents for on-page reading. Use Open original for the raw FDA ZIP/XML source.

Sponsor
Virbac AH, Inc.
NADA
141-441
Status
RX
Form
Chewable Tablets
Route
Oral
Species
Dog
Composition / specifications
Each chewable tablet contains either: 1) 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel; 2) 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel; 3) 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel; or 4) 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel.

Dogs

Indication

For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for a month (30 days) after infection and for the treatment and control of roundworms (Toxocara canis, Toxascaris leonina), hookworms (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense), and tapeworms (Dipylidium caninum, Taenia pisiformis).

Dosage

Administer orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb), and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight, as follows:

  1. 6.0 to 12 pounds- one tablet containing 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel
  2. 12.1 to 25 pounds- one tablet containing 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel
  3. 25.1 to 50 pounds- one tablet containing 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel 
  4. 50.1 to 100 one tablet containing 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel
Limitations

Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.

Iverhart Max®

SPL · SPL

Open original
FDA Structured Product Label

Iverhart Max®

Rendered from Roxee's cached FDA SPL package contents for on-page reading. Use Open original for the raw FDA ZIP/XML source.

Sponsor
Virbac AH, Inc.
NADA
141-257
Status
RX
Form
Tablet (Chewable)
Route
Oral
Species
Dog
Composition / specifications
Each chewable tablet contains:
(1) 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel;
(2) 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel;
(3) 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel; or
(4) 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel.

Dogs (12.1 - 25 Lbs)

Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One table monthly containing 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

Dogs (6.0 - 12 Lbs)

Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One tablet monthly containing 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

Dogs (50.1 - 100 Lbs)

Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One tablet monthly containing 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

Dogs (25.1 - 50 Lbs)

Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One tablet monthly containing 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

IVERHART MAX Chew SPL

SPL · Structured Product Label

Open original
FDA Structured Product Label XML for IVERHART MAX Chew. Use the source link for the full official labeling record.

FOI Summary oN 141-441 Approved December 11, 2017.pdf

FOI · FOI

Open original

ucm051414.pdf

FOI · FOI

Open original

UCM051416.pdf

FOI · FOI

Open original
Source metadata:
Veterinary reference (advanced)

Canonical medication sections are above. This legacy block remains available for deeper cross-reference without cluttering the primary workflow.

At a Glance

Quick facts and links to official labeling and safety signals.

Data freshness
  • Reference facts: Source Roxee | Refreshed Jun 22, 2026, 10:40 AM UTC
    The reference fact projection used for browse cards and quick facts.
  • Animal Drugs @ FDA: Source FDA | Refreshed Jun 22, 2026, 10:40 AM UTC
    Applications/products are imported from FDA export data.
  • Animal Drugs @ FDA previews: Source FDA | Refreshed Feb 9, 2026, 3:05 AM UTC
    Label highlights/doc links are fetched from FDA preview endpoints.
Official (FDA)
Identity: Generic ingredient • No FDA branded products linked
No official FDA brand rows linked yet for this ingredient.
Manufacturer mapping: Virbac AH, Inc
Catalog species: Both • FDA-labeled species: Dog
Rx/OTC: RX
Form/route: Chewable Tablets, Tablet (Chewable) • Oral
Applications: NADA 141-441 • NADA 141-257
Documents: 3 (FOI: 3) • SPL: 2 • Label highlights • Official documents
Safety (openFDA)
Top reactions: Dog 0 • Cat 0 • View
Case summaries: 0
openFDA reports are unverified and do not prove causation.
Explore
Related conditions: Heartworm Disease
Linked using: Fda_Label (0.95)
Diagnosis Codes
ICD10_CM: B74.8
Other filariases

Counseling and Monitoring Highlights

Global Pet owner/Vet mode is controlled in the header. This section avoids duplicate in-page persona tabs.

Owner-facing counseling points
  • For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian. (Contraindication, High)
Top reaction signals
Trouble breathing (dyspnea) (1) Elevated creatinine (1) Elevated cholesterol (1) Elevated alanine aminotransferase (1) Dysphoria (1) Dilated pupils (1) Dermal plaque (1) Dehydration (1)

Identifiers & Packages

Normalized identifiers (NDC/NADA/ANADA) and package metadata from regulator listings.

Identifiers
NADA: 141257 NADA: 141441 NDC Package: 51311-504-02 NDC Package: 51311-505-04 NDC Package: 51311-506-06 NDC Package: 51311-507-08 NDC Product: 51311
Package NDC Product NDC Form / Route Status
51311-504-02 51311 -
51311-505-04 51311 -
51311-506-06 51311 -
51311-507-08 51311 -

Enriched Documents

Documents are tiered by source trust: Official, Clinical, Manufacturer, Marketing.

Data Sources & Change Log

Every non-trivial field is expected to include provenance and update timestamps.

Official 72 Clinical 4 Manufacturer 0 Marketing 0
Current Field Facts
  • side_effects: Top reported reactions (openFDA): INEFFECTIVE, HEARTWORM LARVAE, Vomiting, Drug dose omission, Drug dose administration interval too long, Overdose, Lethargy (… (Clinical, 2026-04-26)
  • side_effects: Top reported reactions (openFDA): INEFFECTIVE, HEARTWORM LARVAE, Vomiting, Drug dose omission, Drug dose administration interval too long, Overdose, Lethargy (… (Clinical, 2026-04-25)
  • side_effects: Top reported reactions (openFDA): INEFFECTIVE, HEARTWORM LARVAE, Vomiting, Drug dose omission, Drug dose administration interval too long, Overdose, Lethargy (… (Clinical, 2026-04-15)
  • side_effects: Top reported reactions (openFDA): INEFFECTIVE, HEARTWORM LARVAE, Vomiting, Drug dose omission, Drug dose administration interval too long, Overdose, Lethargy (… (Clinical, 2026-04-11)
  • contraindications: For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combinat… (Official, 2026-04-26)
  • contraindications: For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combinat… (Official, 2026-04-25)
  • dosage_forms: Chewable tablet (Official, 2026-04-25)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-22)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-22)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-21)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-20)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-13)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-12)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-12)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-11)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-11)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-10)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-09)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-08)
  • indications: For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis) for a month (30 days) after infe… (Official, 2026-06-07)
Recent Revisions
  • side_effects updated 2026-04-26 10:06 by etl_backfill • Backfilled from existing medication fields
  • contraindications updated 2026-04-26 10:06 by etl_backfill • Backfilled from existing medication fields
  • usage updated 2026-04-26 10:06 by etl_backfill • Backfilled from existing medication fields
  • side_effects updated 2026-04-25 10:09 by etl_backfill • Backfilled from existing medication fields
  • contraindications updated 2026-04-25 10:09 by etl_backfill • Backfilled from existing medication fields
  • usage updated 2026-04-25 10:09 by etl_backfill • Backfilled from existing medication fields
  • side_effects updated 2026-04-15 10:04 by etl_backfill • Backfilled from existing medication fields
  • side_effects updated 2026-04-11 10:05 by etl_backfill • Backfilled from existing medication fields
  • side_effects updated 2026-02-12 22:44 by etl_backfill • Backfilled from existing medication fields

FDA Products & Applications (Animal Drugs @ FDA)

Official sponsor/proprietary-name/application-status records linked by active ingredient.

Product Sponsor Application Status Published
IVERHART MAX® Chew
RX
Ivermectin Praziquantel Pyrantel Pamoate
Chewable Tablets • Oral
Label highlights
Official documents
Virbac AH, Inc. NADA 141-441 Approved Nov 19, 2020
Iverhart Max®
RX
Ivermectin Praziquantel Pyrantel Pamoate
Tablet (Chewable) • Oral
Label highlights
Official documents
Virbac AH, Inc. NADA 141-257 Approved Jun 1, 2016

Data source: FDA Animal Drugs @ FDA (public search export).

What It's For (FDA Label Highlights)

Extracted from FDA Animal Drugs @ FDA product labeling. Always confirm details with your veterinarian.

Species: Dog
Composition / specifications
Each chewable tablet contains either: 1) 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel; 2) 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel; 3) 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel; or 4) 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel.
Dogs
Indication

For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for a month (30 days) after infection and for the treatment and control of roundworms (Toxocara canis, Toxascaris leonina), hookworms (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense), and tapeworms (Dipylidium caninum, Taenia pisiformis).

Dosage

Administer orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb), and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight, as follows:

  1. 6.0 to 12 pounds- one tablet containing 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel
  2. 12.1 to 25 pounds- one tablet containing 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel
  3. 25.1 to 50 pounds- one tablet containing 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel 
  4. 50.1 to 100 one tablet containing 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel
Limitations

Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.

FDA page: Open in Animal Drugs @ FDA

Species: Dog
Composition / specifications
Each chewable tablet contains:
(1) 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel;
(2) 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel;
(3) 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel; or
(4) 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel.
Dogs (12.1 - 25 Lbs)
Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One table monthly containing 68 mcg ivermectin, 57 mg pyrantel pamoate, and 57 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Dogs (6.0 - 12 Lbs)
Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One tablet monthly containing 34 micrograms (mcg) ivermectin, 28.5 milligrams (mg) pyrantel pamoate, and 28.5 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Dogs (50.1 - 100 Lbs)
Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One tablet monthly containing 272 mcg ivermectin, 228 mg pyrantel pamoate, and 228 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Dogs (25.1 - 50 Lbs)
Indication
Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae (Dirofilaria immitis) for 1 month (30 days) after infection and for the treatment and control of roundworm (Toxocara canis, Toxascaris leonine), hookworm (Ancylostoma caninum, Uncinaria stenocephala, Ancylostoma braziliense) and tapeworm (Dipylidium caninum, Taenia pisiformis) infections.
Dosage
Administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb), 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) and 5 mg of praziquantel per kg (2.27 mg/lb) of body weight. (One tablet monthly containing 136 mcg ivermectin, 114 mg pyrantel pamoate, and 114 mg praziquantel)
Limitations
For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

FDA page: Open in Animal Drugs @ FDA

Usage

Prevents canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for 1 month (30 days) after infection and for the treatment and control of roundworm ( Toxocara canis , Toxascaris leonine ), hookworm ( Ancylostoma caninum , Uncinaria stenocephala , Ancylostoma braziliense ) and tapeworm ( Dipylidium caninum , Taenia pisiformis ) infections. For use in dogs to prevent canine heartworm disease by eliminating the tissue stage of heartworm larvae ( Dirofilaria immitis ) for a month (30 days) after infection and for the treatment and control of roundworms ( Toxocara canis , Toxascaris leonina ), hookworms ( Ancylostoma caninum , Uncinaria stenocephala , Ancylostoma braziliense ), and tapeworms ( Dipylidium caninum , Taenia pisiformis ).

Source: FDA Animal Drugs @ FDA • Reference

Contraindications

For oral use in dogs only. IVERHART MAX Chewable Tablets are recommended for dogs 8 weeks of age and older. For dogs over 100 lbs, use the appropriate combination of these Chewable Tablets. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian.

Top Reported Reactions (openFDA)

De-duplicated reaction terms grouped by body system from FDA openFDA reports (not verified; does not prove causation).

Digestive
Loss of appetite (1) • Dog Drooling (1) • Dog Diarrhea (1) • Dog

Showing top 5 for Digestive.

Skin & allergy
Alopecia NOS (1) • Dog

Showing top 5 for Skin & allergy.

Behavior
Behavioral disorder (1) • Cat Aggression (1) • Dog

Showing top 5 for Behavior.

Other
Trouble breathing (1) • Dog Elevated creatinine (1) • Cat Elevated cholesterol (1) • Dog Elevated alanine aminotransferase (1) • Dog Dysphoria (1) • Cat
Show more (21)
Dilated pupils (1) • Cat Dermal plaque (1) • Dog Dehydration (1) • Cat Decreased activity (1) • Cat Death by euthanasia (1) • Dog Death (1) • Cat Crying (1) • Dog Crust (1) • Dog Crackles on auscultation (1) • Dog Cough (1) • Dog Conjunctivitis (1) • Dog Complication of diabetes (1) • Dog Cardiomyopathy (1) • Cat Cachexia (1) • Cat Bradycardia (1) • Cat Bacterial skin infection NOS (1) • Dog Angioedema (1) • Dog Abnormal ultrasound finding (1) • Dog Abnormal radiograph finding (1) • Dog Abnormal histology NOS (1) • Cat Abnormal cytology (1) • Cat

Showing top 5 for Other.

Data source: FDA openFDA Animal & Veterinary adverse event reports.

Adverse Event Case Summaries (openFDA)

These are individual FDA adverse event reports. They are unverified and do not prove the medication caused the reaction.

No case-level openFDA reports are linked for this medication yet.

Data source: FDA openFDA Animal & Veterinary adverse event reports.

Overdose Information

No approved overdose-management text is linked yet. If overdose is suspected, contact a veterinarian or emergency clinic immediately.

Storage & Handling

No approved storage guidance is linked yet for this ingredient. Use manufacturer packaging and veterinary guidance for handling/storage.

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Let others know your experience or advice regarding this medication.

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