Deb & John Lenon
"In God & Labs We Trust"
My understanding is that Novartis is back shipping (and has been for a short time) as I was able to get product at my vet here in Canada about a month ago.
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GMHR-II Dakota Creek's Royal Navigator MH
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I had to switch over to heartguard.
The amount of Ivermectin in Heartgard is minuscule so they can mass market it to all dogs including ivermectin resistant collies. Any ivermectin even the oral doses of injectable ivermectin which many people give stays in the dog's bloodstream no longer than 48 hours. That is two days out of a month your dog has protection. The other 28 days they can be infected with heartworm larvae.
Moxidectin is the newest drug which will also kills ivermectin resistant heartworm larvae. We have to use it in the Mississippi River area due to ivermectin resistant heart worms. It also stays in the dog's bloodstream the whole month, not just two days.
Advantage Multi and the Proheart 6 shot (which by the way is the most affordable) both use moxidectin. I wrote several articles on FindRetrievers concerning this issue.
Here is a link to a study done on Beagles but the Ivermectin was injected subcutaneously which will make it stay in the dog's system longer. I believe it was completely gone in 11 days, but again that is SC.
When dosing any meds orally vs SC, the injectable will last longer. The Proheart 6 shot is around $60 for six months of protection. To me that is very affordable, my vet handles it, and I don't worry about my dogs getting heartworms now.
Please don't just believe anything you read or hear though. Do your own research. Just Google 'heartworm resistance' and you will have plenty to read. Also, read up on getting rid of heartworms with doxycycline. Stay advised and keep your dogs healthy!
Is there a problem with Iverhart Max? I don't know a lot about worming meds and basically follow what my vet recommends and Iverhart Max is what he prescribed for my dog. Thanks