Heartgard Plus Generic Equivalents: Tri-Heart vs Nuheart vs Iverhart
Essential Pricing Takeaways
- • FDA-approved generic equivalents Tri-Heart Plus (Merck) and Iverhart Max provide the exact same Ivermectin and Pyrantel pamoate concentrations as Heartgard Plus.
- • A 6-month supply of generic Tri-Heart Plus costs $32 to $38 ($5.50/dose) compared to $54 to $65 for brand Heartgard Plus ($9.50/dose), saving $45–$75 per dog annually.
- • Veterinarians require an annual negative heartworm blood test before authorizing either brand-name or generic ivermectin chewables.
Heartworm disease is a potentially fatal cardiovascular infection transmitted by mosquitoes across all 50 states. For decades, Boehringer Ingelheim's real-beef Heartgard Plus has been the most prescribed preventative chewable in the country.
However, pet parents paying clinic prices often spend $12 to $15 per monthly chewable. In this 2026 generic pricing audit, we compare FDA-approved bioequivalent alternatives like Tri-Heart Plus, Iverhart Plus, and Nuheart, showing you how to cut heartworm prevention costs in half.
2026 Heartgard Plus vs. Generic Equivalents Price & Formulation Audit
| Brand / Generic Product | Active Ingredients | Form / Flavor | Chewy Pharmacy (6 Doses) | Walmart PetRx (6 Doses) | Best Deal Verdict | Action |
|---|---|---|---|---|---|---|
| Tri-Heart Plus (Merck Animal Health) | Ivermectin + Pyrantel Pamoate | Flavored Chewable Tablet | $34.99 ($5.83/dose) | $32.50 ($5.42/dose) | Best value FDA-approved direct Heartgard generic | Check Price → |
| Heartgard Plus (Boehringer Ingelheim) | Ivermectin + Pyrantel Pamoate | Real Beef Chewable | $54.99 ($9.16/dose) | $52.50 ($8.75/dose) | Most palatable; 40% more expensive than generics | Check Price → |
| Iverhart Max (Virbac) | Ivermectin + Pyrantel + Praziquantel | Pork-Flavored Chewable Tablet | $38.99 ($6.50/dose) | $37.20 ($6.20/dose) | Adds Praziquantel to treat tapeworms for $1 more | Check Price → |
| Nuheart Generic Ivermectin (Overseas) | Ivermectin (Soluble Micro-Tablet) | Soluble Micro-Tablet | N/A (Intl Only) | N/A | Cheapest pure ivermectin option without US prescription delays | Check Price → |
*Pricing figures are audited periodically. Destination pharmacies may alter promotions or manufacturer rebates without advance notice.
Top Recommended Options & Discounts
Tri-Heart Plus Chewable Tablets (Merck)
Best For: Pet parents wanting identical medical protection to Heartgard Plus at 40% lower cost
- ✓ FDA bioequivalent active ingredients (Ivermectin 68mcg-272mcg + Pyrantel pamoate)
- ✓ Eliminates heartworm larvae while clearing intestinal roundworms and hookworms
- ✓ Free 1-2 day pharmacy delivery with electronic veterinarian prescription verification
Canada Pet Care Generic Heartworm Specials
Best For: Multi-dog households wanting annual 12-month heartworm supplies delivered without clinic markups
- ✓ Genuine international formulations identical to US generic equivalents
- ✓ Zero recurring annual clinic visit fees or prescription re-check delays
- ✓ Free worldwide shipping with guaranteed door-to-door tracking
Is Generic Tri-Heart Plus as Effective as Real Heartgard?
The short answer is an absolute yes. To obtain FDA approval (NADA 200-338), Merck had to scientifically prove that Tri-Heart Plus is chemically and pharmacokinetically bioequivalent to Heartgard Plus.
Both products deliver the exact same microgram dosage of ivermectin to eliminate tissue-stage heartworm microfilariae, and identical concentrations of pyrantel pamoate to eradicate canine ascarids and hookworms. The only physical difference is that Heartgard uses soft real-beef dough, while Tri-Heart Plus is a compressed flavored chewable tablet (see our cheapest Heartgard Plus price guide).
Iverhart Max: Why the Extra Ingredient May Matter for Hunting Dogs
If your dog hunts small rodents or consumes wild rabbits, they face high exposure to Dipylidium caninum and Taenia tapeworms, which standard Heartgard Plus does not treat.
Virbac's Iverhart Max adds a third active pharmaceutical ingredient—Praziquantel—to the standard Ivermectin/Pyrantel matrix. Because it costs only $1 to $2 more per box than basic generics, it provides comprehensive deworming coverage for active outdoor canines (compare with our Simparica Trio alternatives guide).
How to Save Maximum Money on Annual Heartworm Preventatives
First, request your vet write the script for "generic ivermectin/pyrantel" rather than brand-name Heartgard, which legally allows your pharmacy to dispense the lowest-priced generic. Second, buy a 12-month box rather than two 6-month boxes to capture volume tier discounts. Third, set up pharmacy AutoShip to secure 5% to 35% repeat savings (check our online pet pharmacy price rankings).