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Heartgard vs Interceptor Spectrum - Expert's Oppinion

HeartGard Plus

HeartGard Plus' active ingredients are ivermectin and Pyrantel. Administer the HeartGard heartworm preventative monthly to prevent heartworm, round worm and hookworm. HeartGard, unlike Interceptor, does not work to prevent whipworm. HeartGard comes in three different dosage sizes, which are available in 6-dose packages and 12-dose packages.

Choose the right dose of Heartgard. Dogs up to 25 lb. in weight should use the blue package, which offers 68 mcg of ivermectin and 57 mg of Pyrantel. Dogs between 26 lb. and 50 lb. should use the green package, which offers 136 mcg of ivermectin and 114 mg of Pyrantel. Dogs between 51 lb. and 100 lb. in weight should use the brown package, which offers 272 mcg of ivermectin and 227 mg of Pyrantel. Dogs larger than 100 lb. should receive the proper dosage by combining multiple HeartGard chewables.

Color	Pets	Weight (lb)	Weight (kg)	Ivermectin	Pyrantel
Blue	Small Dogs	0 - 25lbs	0 to 11kg	68mcg	57mg
Green	Medium Dogs	26 - 50lbs	12 - 22kg	136mcg	114mg
Brown	Large Dogs	51 - 100lbs	23 - 45kg	272mcg	227mg

Interceptor Spectrum

The active ingredient for Interceptor Spectrum consists of milbemycin oxime and praziquantel . Administer Interceptor once a month to prevent heartworm, hookworm, whipworm and roundworm infections. The four different tablet sizes of Interceptor come in color-coded packages. Each dose of Interceptor Spectrum provides 0.23 mg/lb. of body weight of milbemycin oxime and 2.28mg/lb. of body weight of praziquantel.

Dogs between 2-10 lb. in body weight will benefit from the brown package, which offers a dosage of 2.3 mg. Dogs between 11-25 lb. take pills from the green package, which offers a dosage of 5.75 mg. Dogs between 26 lb.-50 lb. in body weight will benefit from the yellow package, which offers a dosage of 11.5 mg. Finally, dogs that are 51 lb. or larger will benefit from the white package, which offers a dosage of 23.0 mg.

Color	Weight (lb)	Weight (kg)	milbemycin oxime	praziquantel
Brown	2 - 10lbs	0 - 4kg	2.3mg	22.8mg
Green	11 - 25lbs	4 - 11kg	5.75mg	57mg
Yellow	26 - 50lbs	11 - 22kg	11.5mg	114mg
Blue	51 - 100lbs	22 - 45kg	23mg	228mg

For more information, visit our product sites Heartgard Plus and Interceptor Spectrum.

Heartgard vs Interceptor - Customer Feekbacks

I have been giving Interceptor (mylbemycin) for heartworm preventative, but was recently given some Heartgard (ivermectin) by a veterinarian friend. Is there any advantage of one over the other? More problems with one vs the other?

Heartgard - came out first in the market so has a competitive edge, kind of like when you think toothpaste, you think Colgate. It does have side effects when overdosed. It comes in the conventional tablets or the chewable kind - problem with big dogs is that they often swallow the thing whole - no chewing - no good because the tablets need to be chewed to release the drug - so if you have one of these then you will have to break the chewable tablets up and feed it bit by bit or mix it in with the food. Collie breeders steer clear of the stuff because for some reason Collies tend to get reactions to it (ditto for Sheltie breeders).

Interceptor - came in the market much later. Milbemycine is a different class of drug and the advantage is that on top of heartworm, it also controls hookworm, roundworm and whipworm - which is why when it came out into the market, Heartgard released Heartgard Plus (to tackle the gut worm issue too). Has side effects too if given at too high a dose. The drug is also used to treat demodex mites if a dog has demodecosis. There is no mention as to what happens if the tablet is swallowed whole - so I'd say do the same with the Heartgard tablets and break it up.

I've used HeartGard for many years, FWIW. I didn't know that they needed to be chewed to be effective though! Yikes. Is that true? I have not had a dog test positive for HW ever, and no adverse effects I've ever noticed.

I use Interceptor - recommended by both my breeder and vet.

It seems the main difference is that Interceptor also covers whipworm & roundworm etc, while Heartgard only covers heartworm.

Heartgard Plus works on heartworms, roundworms, and hookworms. Interceptor works on heartworms, roundworms, hookworms, and whipworms.

We use Interceptor on all three dogs, because I like the product better and Aussies and other collie-type breeds can have reactions to the active ingredient in Heartguard (Ivermectin). I also deworm once a quarter with Safeguard, which is another broad spectrum dewormer.

I use interceptor on my aussie for the reason stated above and a generic form of Heartguard for my husky. I used to use Sentinal though. Imo they all work fine and I've never had a problem.

I prefer Interceptor. It gets heartworms and most of the intestinal worms (not tapeworms) with one pesticide. The chemical is out of the dog's system within 48 hours.

Heartgard gets heartworms, but not intestinal worms. Some think that the dosage (reduced so herding dogs can take it) is now too low to be dependably effective. Heartgard Plus does get intestinal worms (not tapeworms), but has second pesticide to do that.

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Buy Heartgard or Heartgard Plus - $18.95 | Buy Discount Heartgard Plus For Dogs

Interceptor Spectrum Chewables | Buy Discount Interceptor Spectrum For Dogs