Giving a dog a heartworm preventative when they already have heartworms can be dangerous, potentially causing severe reactions or even death due to the rapid killing of microfilariae (baby worms) in the bloodstream, triggering shock; the preventative doesn't kill adult worms, so a vet test is crucial before starting, and if positive, a specific, veterinarian-supervised treatment plan is needed, not just more prevention.
Administering Nexgard Plus during active heartworm infection is generally safe but should be done under veterinary guidance to avoid complications. Always consult your vet for appropriate heartworm treatment and timing of other parasite preventives.
Simparica Trio is generally safe for heartworm-positive dogs but consult your vet before administration. Vomiting can occur as a side effect or due to stress. Monitor for symptoms like lethargy, diarrhea, or blood in stool. Treatment includes monthly parasite prevention and scheduled heartworm therapy.
The amount of ivermectin in standard dog heartworm prevention is not likely to cause an emergency in non-sensitive dog breeds if they consumed 1-2 tablets above their normal dosage. However, ingesting a large number of tablets or medication intended for a larger animal may be a concern for your dog.
It is rare but some dogs can still get a heartworm infection even when they're taking monthly preventative. Vets are always going to make sure your dog isn't the 1/100 case because the consequences can be significant.
Heartworm preventives do not kill adult heartworms. Also, giving a heartworm preventive to a dog infected with adult heartworms may be harmful or deadly. If microfilariae are in the dog's bloodstream, the preventive may cause the microfilariae to suddenly die, triggering a shock-like reaction and possibly death.
You should know that although heartworm can be fatal, it is very treatable if caught early. And even more importantly, your veterinarian can prescribe preventatives that are highly effective in stopping your dog from getting heartworm in the first place.
What happens if I accidentally give my dog two NexGard chews? If you accidentally give your dog two NexGard chews, please contact your veterinarian immediately. Neurological symptoms such as loss of balance, muscle tremors, and dilated pupils may be a sign of overdose.
Anecdotal evidence suggests that herbs such as garlic, black walnut and wormwood, and the homeopathic heartworm nosode, may actually prevent as well as treat infection. Unfortunately, I have not yet been able to find substantive proof that these therapies can reliably and safely prevent or treat infection or disease.
If you have a breeding dog, a pregnant dog, or a puppy between 6 and 8 weeks old, Heartgard Plus is the safest option. If you're hoping to find a broad-spectrum product that protects against fleas and ticks while it defends against internal parasites, Simparica Trio is the clear winner.
How long can a dog live with heartworms? Dogs are able to live for years with this parasite, however, their condition will continuously worsen. It's a dangerous disease overall, which is why some people have even described untreated heartworms as the “slow kill.”
However, Heartgard Plus Chewables cannot prevent the development of the adult stage. Use with caution for collies and other herding dog breeds. These breeds have been known to have adverse reactions to ivermectin at elevated dose levels.
Can I give my dog both NexGard and Heartgard on the same day? Yes, it's safe to administer both mediations on the same day. They target different types of pests and are often given together to ensure comprehensive protection.
The Silent Early Stages
After an infected mosquito bites a pet, heartworm larvae enter the bloodstream and begin their journey. The troubling part is that these worms grow slowly, and it can take six months or longer before any signs become noticeable.
Approximately 1 in 500 cats nationwide test positive for heartworms each year. Heartworm rates are higher in Texas, Mississippi, Alabama and Louisiana, where 1 in 200 cats tested positive (see Louisiana-specific news release).
Restrict exercise.
But your dog's normal physical activities must be restricted as soon as the diagnosis is confirmed, because physical exertion increases the rate at which the heartworms cause damage in the heart and lungs. The more severe the symptoms, the less activity your dog should have.
One popular option is the use of pumpkin seeds. These seeds contain a compound called cucurbitacin that can paralyze worms, making it easier for your dog's system to expel them. Simply grind the seeds and mix them into your dog's food. It's important to ensure that you use raw, unsalted seeds for the best results.
Because heartworms must be eliminated before they reach this adult stage, it is extremely important that heartworm preventives be administered strictly on schedule (monthly for oral and topical products and every 6 months or 12 months for the injectable).
The amount of ivermectin in standard dog and cat heartworm prevention is not likely to cause a concern in non-sensitive breeds if they were to ingest 1-2 tablets above their normal dosing. However, ingesting a larger number of tablets or medication intended for a larger animal, may be a concern.
Can I administer NexGard and NexGard SPECTRA for Dogs more than once a month? NexGard chews have been shown to provide effective protection for a complete month: it is not required or recommended to treat more frequently than this.
These products are safe to use in the majority of pets, but there are some pets that cannot tolerate the medication (specific liver disorders, pre-existing seizure disorders).
The treatment for heartworms is highly successful, but the dog may still suffer long-term effects like pulmonary hypertension, which can shorten its lifespan. Preventing heartworm is much easier and better for the dog's health.
Moxidectin-doxycycline (moxi-doxy) provides a viable alternative to no treatment at all, in cases where arsenical treatment is not possible. Based on current evidence, the most effective non-arsenical treatment regimen is doxycycline 10 mg/kg PO q 12 or 24 h for 28 days, combined with topical moxidectin at label dose.
Heartworm is a progressive, life-threatening disease. The earlier it is detected and treated, the better the chances that your pet will recover and have less complications. Dogs: As with most medical problems, it is much better to prevent heartworm infection than to treat it.