Iverhart Plus® Chewables
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Iverhart Plus® Chewables

Iverhart Plus Tablets (Generic)
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Frequently Asked Questions

Q.  I have been giving my dog Heartgard Plus for years. Will Iverhart Plus provide him with the same protection?
A.  Yes. Iverhart Plus has the same exact active ingredients, Ivermectin and Pyrantel, the same quality, and same strength as the Heartgard Plus brand, but costs less. Iverhart Plus was approved by the FDA in 2001 as a bio-equivalent to Heartgard Plus. It offers the same protection against heartworm disease and against intestinal roundworms and hookworms as does Heartgard Plus.

Q.  I have heard that certain dogs have food sensitivities to the beef in some heartworm protection products. How does Iverhart address this issue?
A.  Over the years, food allergies have become a concern to veterinarians. Iverhart Plus is preferred by our veterinarians not only because it is more economical, but because it is pork-based and perfect for dogs with food allergies especially sensitivity to beef products.

Q.  How is Iverhart Plus different than Iverhart?
A.  Iverhart Plus delivers all of the benefits of Iverhart in addition to eliminating roundworms and hookworms, which can cause intestinal disease. In addition to Ivermectin, Iverhart Plus contains Pyrantel, which has been shown to be effective in the removal of certain intestinal worms.

Q.  What is heartworm disease and why is it bad for my dog?
A.  Adult heartworms lay very tiny larvae called microfilariae, which circulate in the blood. They enter a mosquito when it sucks the blood of an infected animal. They mature in the mosquito and then enter the animal's skin when an infected mosquito bites the animal. When the larvae reach about 3 inches, they migrate to the animal's heart where they grow into adults, sometimes reaching a length of 14 inches.

The adult worms can obstruct the different chambers of the heart and the various large blood vessels leading to and from the heart and lungs. In severe infections, other organs, such as the liver, can also be damaged.

Q.  Does my dog need a test before I start giving him Iverhart Plus?
A.  The American Heartworm Society advises that all adult dogs being started on a heartworm preventative for the first time be tested. The frequency of testing should take into account variables such as:
  • Prevalence of heartworm disease in the area
  • Missed or late doses of heartworm preventative
  • The dog's lifestyle
For instance, in Northern Wisconsin, puppies born in January do not need to be tested. Consult with your veterinarian to determine the appropriate testing schedule for your dog.

Q.  How often should I give this medication to my dog?
A.  Iverhart Plus tablets are meant to be given every 30 days. When you start your dog on Iverhart Plus, make sure to give it to him on the same day each month.

Q.  When should I start giving my dog Iverhart Plus during the year?
A.  Remember that Iverhart Plus kills larvae your dog was exposed to in the preceding 30 days, so if you give your dog a preventative seasonally, give it to him a month after the first mosquito appears.

Q.  What if I miss a dose?
A.  If the interval between doses exceeds 30 days, Ivermectin's efficacy can be reduced. Therefore, if you miss a dose, give the Iverhart Plus as soon as you remember that you missed it.

Q.  I have heard that Collies and other herding breeds have trouble with Ivermectin. What can you tell me about this?
A.  Collies or other herding breeds may have a reaction to ivermectin if given over the recommended heartworm prevention dose. If your dog is one of these breeds, and your veterinarian has prescribed Iverhart Plus, observe your pet for at least 8 hours after giving the medication for weakness, staggering, dilated pupils, trembling, drooling, or pressing the head against a wall. Contact your veterinarian immediately if you see these signs.

Q.  What if my dog is fussy and won't take a tablet?
A.  Iverhart Plus tablets are incredibly palatable to dogs. But, if your dog just won't take a tablet, place it in a sticky treat such as cream cheese or peanut butter.

Q.  Can I break up a larger tablet into pieces to give my small dog?
A.  No. The active ingredient in Iverhart Plus is not uniformly mixed throughout the tablet. The entire, appropriately sized tablet must be given.

Q.  When should I start giving my puppy Iverhart Plus?
A.  You can start giving Iverhart Plus after your puppy reaches 6 weeks of age.

Drs Foster and Smith Articles

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Rx Information

Ordering your pet's prescription is as EASY as:
1 ADD your pet's medication to your Shopping Cart.
2 ANSWER a few questions about your prescription
3 CHECK OUT – We'll take care of the rest – even
contact your veterinarian!

Pharmacy Hours:
Mon. - Fri. 9:00 a.m. - 6:00 p.m. CST
Sat. 9:00 a.m. - 1:00 p.m. CST

If you have any questions, feel free to call us at 1-800-447-3021 or email us.
  • If you are calling us during regular pharmacy hours and have left a message: please allow our pharmacy professionals two hours to respond; messages left after hours will be answered on the next business day within 2-4 hours.

  • If you are emailing us: please allow up to a 12 hour response time.

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our WI License Number is: 8266-042

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