Do older dogs need heartworm medicine?

Protecting your dog from heartworm disease

Best Answer

Treatment for heartworm disease in dogs is both harsh and expensive.

This requires multiple visits to the veterinarian for lab work and injections of an arsenic-based medication.

Some older dogs or those with other pre-existing health conditions may not even be candidates for heartworm treatment.

Starving and Heartworm Positive

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Related Questions

Do dogs need heartworm medicine?

Annual testing is necessary, even when dogs are on heartworm prevention year-round, to ensure that the prevention program is working. Heartworm medications are highly effective, but dogs can still become infected. If you miss just one dose of a monthly medication—or give it late—it can leave your dog unprotected.

Do dogs really need heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Do inside dogs need heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos.

Is Heartworm Prevention Really Necessary?

Do indoor cats need heartworm medicine?

An ultrasound may also be performed. Treatment. Unfortunately, there is no approved drug therapy for heartworm infection in cats, and the drug used to treat infections in dogs is not safe for cats. Nevertheless, cats with heartworm disease can often be helped with good veterinary care.

Does my dog need heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Do you really need to give your dog heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. A mosquito will bite an infected animal and then pass the infection onto your dog should it bite him or her.

Do dogs need heartworm medicine in the winter?

That's one reason veterinarians often recommend that pets receive heartworm prevention medication all year long. Although there are a fewer number of mosquitoes in the winter, there is still a risk that an animal could contract heartworms if the owner stops giving medication during this season.

Do dogs really need to take heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. A mosquito will bite an infected animal and then pass the infection onto your dog should it bite him or her.

What the Vets won't tell you! How to kill Heartworms! Also Prevent getting them.

Do dogs need to be on heartworm medicine all year?

Heartworm disease is transmitted through the bite of an infected mosquito. Today, since cases have been reported in all 50 states and because mosquitoes can live inside (even in winter), it's recommended that no matter where you live, you give your dogs and cats heartworm prevention medicine year-round.

Does my puppy need heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Do you need to give your dog heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. A mosquito will bite an infected animal and then pass the infection onto your dog should it bite him or her.

Do you need a prescription for heartworm medicine for dogs?

Veterinarians will usually require a heartworm test prior to writing a prescription for heartworm preventative medication. It's important to never give Heartgard to any pet that has not been tested for heartworm disease.

Do you need a prescription for dog heartworm medicine?

Although Heartgard and other heartworm medicines require a prescription, at 1-800-PetMeds, we make the ordering process easy. Our pharmacy department will verify your pet's prescription for you by calling or faxing your veterinarian. Then, we'll deliver your pet's medication right to your door!

Heartworm: Facts, Myths and Natural Treatments

Does my dog need heartworm medicine in the winter?

That's one reason veterinarians often recommend that pets receive heartworm prevention medication all year long. Although there are a fewer number of mosquitoes in the winter, there is still a risk that an animal could contract heartworms if the owner stops giving medication during this season.

Will heartworm medicine kill heartworms?

The only prevention they offer is killing the mosquito larvae (microfilaria) before they develop into adult worms, which migrate to your dog's pulmonary artery and cause heartworm symptoms. Your dog's heartworm meds work by killing those little larvae or microfilariae.

Does my dog need to take heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months.

Does my dog need heartworm medicine in winter?

That's one reason veterinarians often recommend that pets receive heartworm prevention medication all year long. Although there are a fewer number of mosquitoes in the winter, there is still a risk that an animal could contract heartworms if the owner stops giving medication during this season.

Do dogs really need heartworm meds?

Heartworm prevention is something many dog owners obtain from their vet on an annual basis. In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months.

Do dogs need heartworm meds in winter?

That's one reason veterinarians often recommend that pets receive heartworm prevention medication all year long. Although there are a fewer number of mosquitoes in the winter, there is still a risk that an animal could contract heartworms if the owner stops giving medication during this season.

Do I need to give my dog heartworm medicine in the winter?

That's one reason veterinarians often recommend that pets receive heartworm prevention medication all year long. Although there are a fewer number of mosquitoes in the winter, there is still a risk that an animal could contract heartworms if the owner stops giving medication during this season.

Do I really need to give my dog heartworm medicine every month?

But that does NOT mean monthly heartworm prevention with drugs. Pumping your dog full of drugs every 30 days is just going to make his immune system unable to defend itself and cause who knows how many negative side effects. That means they work by paralyzing the nervous system of the microfilariae in your dog's body.

Do you need to give your dog heartworm medicine in the winter?

Heartworm disease is transmitted through the bite of an infected mosquito. Today, since cases have been reported in all 50 states and because mosquitoes can live inside (even in winter), it's recommended that no matter where you live, you give your dogs and cats heartworm prevention medicine year-round.

Do dogs need heartworm?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. A mosquito will bite an infected animal and then pass the infection onto your dog should it bite him or her.

How often do I need to give my dog heartworm medicine?

Dogs should be given heartworm pills on the same day of each month. The first dose will kill any existing heartworm infestations and protect your pet for the next month. Most vets recommend that you give your dog heartworm pills year-round.

Will heartworm medicine kill a dog with heartworms?

Heartworm Preventatives Don't Actually Stop the Initial Infection. If an infected mosquito happens to bite your dog, your pup may still be infected with the larvae. But heartworm medications work to kill off the larval heartworms that made it into your dog's body during the past month to prevent further infection.

Is heartworm medicine really necessary?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Does heartworm medicine prevent roundworms?

Your veterinarian can test for roundworms with a fecal sample. Not all heartworm preventives treat and control roundworms. HEARTGARD® Plus (ivermectin/pyrantel) helps prevent heartworm disease AND treats and controls two species of roundworms.

Does heartworm medicine treat tapeworms?

Heartworm medications target the parasitic worm Dirofilaria immitis, or heartworm. When infection occurs, these worms travel through your dog's bloodstream and into the heart and lungs. Monthly heartworm medications work by killing heartworm larvae before they develop into adults.

Do older dogs need shots?

Dogs older than seven years of age are considered senior pets. Typically, senior pets will receive most vaccines every three years. Some vaccines with shorter duration of immunity such as kennel cough, leptospirosis, or Lyme disease vaccines may be given more frequently (every six to twelve months).

Should you give your dog heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Can a pregnant dog take heartworm medicine?

Your vet may recommend administering vaccinations to your dog during her pregnancy, especially if your dog missed her last round of boosters. If you're using topical flea and tick protection, or the monthly heartworm medication ivermectin, please continue to use these medications during your dog's pregnancy.

Should dogs take heartworm medicine year round?

Heartworm disease is transmitted through the bite of an infected mosquito. Today, since cases have been reported in all 50 states and because mosquitoes can live inside (even in winter), it's recommended that no matter where you live, you give your dogs and cats heartworm prevention medicine year-round.

Should I give my dog heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. A mosquito will bite an infected animal and then pass the infection onto your dog should it bite him or her.

Can heartworm medicine make a dog sick?

Common active ingredients used in heartworm preventives today include ivermectin and milbemycin. Ivermectin has been used for decades to prevent heartworm disease in dogs. There are rarely side effects, if given at the proper dosage, but some dogs may experience vomiting, diarrhea, or incoordination.

What medicine kills heartworms in dogs?

Slow kill heartworm treatment is another form of ivermectin-based treatment that involves giving your dog heartworm preventative medication monthly. This sort of treatment waits for the worms to die naturally.

Is heartworm medicine dangerous for dogs?

You have every right to think that way. Heartworm is a scary disease that could threaten your dog's life. Your dog's heartworm meds work by killing those little larvae or microfilariae. Once they develop into adult heartworms, however, it's dangerous to use those meds to treat your dogs.

Can dogs get sick from heartworm medicine?

Ivermectin has been used for decades to prevent heartworm disease in dogs. There are rarely side effects, if given at the proper dosage, but some dogs may experience vomiting, diarrhea, or incoordination. Your veterinarian can suggest alternative heartworm preventives for your dog if it is one of the breeds at risk.

When should dogs take heartworm medicine?

Puppies and kittens as young as 6-8 weeks of age can and should be protected from heartworm infection. The exact age at which you start your pet on heartworm prevention depends upon the particular medication you choose and your pet's weight.

Do dogs need heartworm pills?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

How often do you give dogs heartworm medicine?

Dogs should be given heartworm pills on the same day of each month. The first dose will kill any existing heartworm infestations and protect your pet for the next month. Most vets recommend that you give your dog heartworm pills year-round.

Do you have to give your dog heartworm medicine?

Annual testing is necessary, even when dogs are on heartworm prevention year-round, to ensure that the prevention program is working. Heartworm medications are highly effective, but dogs can still become infected. If you miss just one dose of a monthly medication—or give it late—it can leave your dog unprotected.

Is heartworm medicine bad for dogs?

While these drugs are generally safe and effective, there are always exceptions. Toxicity associated with ivermectin include depression, ataxia (balance problems or unsteady walk), and blindness, but these are uncommon at the low doses used in heartworm preventatives.

Can heartworm medicine make my dog sick?

Ivermectin has been used for decades to prevent heartworm disease in dogs. There are rarely side effects, if given at the proper dosage, but some dogs may experience vomiting, diarrhea, or incoordination. Certain breeds of dog are at risk of having a reaction to ivermectin and milbemycin.

Should my dog take heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Is heartworm medicine necessary for indoor dogs?

Heartworm disease is transmitted through the bite of an infected mosquito. Today, since cases have been reported in all 50 states and because mosquitoes can live inside (even in winter), it's recommended that no matter where you live, you give your dogs and cats heartworm prevention medicine year-round.

Can I give my dog heartworm medicine?

But that does NOT mean monthly heartworm prevention with drugs. Heartworm prevention drugs don't actually prevent heartworm. They kill heartworm larvae that may already be in your dog's body. So, if your dog hasn't been infected, you're giving him harmful drugs for something he doesn't even have.

Do you have to give dogs heartworm medicine year round?

That's one reason veterinarians often recommend that pets receive heartworm prevention medication all year long. Heartworms have been reported in dogs in all 50 states, and just because you live in a state with a colder climate doesn't mean that your animal is safe,” McLean warns.

Is it OK to skip heartworm medicine?

It is not necessary to have a pet immediately tested for heartworms if they have missed one month of heartworm medicine. Most of the monthly heartworm medicines have a safety factor of at least 15 days of protection if a dose is missed.

Should I give my puppy heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. But there are many pet owners who do not use heartworm preventatives on their dogs.

How long does heartworm medicine last?

It is not necessary to have a pet immediately tested for heartworms if they have missed one month of heartworm medicine. The reason for this is because it takes at least 6 months for a pet to become heartworm-positive if he or she is bitten by mosquitoes carrying heartworms.

When can puppies get heartworm medicine?

Puppies and kittens as young as 6-8 weeks of age can and should be protected from heartworm infection. The exact age at which you start your pet on heartworm prevention depends upon the particular medication you choose and your pet's weight.

Can you give a puppy heartworm medicine?

Heartworm medications are highly effective, but dogs can still become infected. If you miss just one dose of a monthly medication—or give it late—it can leave your dog unprotected. Even if you give the medication as recommended, your dog may spit out or vomit a heartworm pill—or rub off a topical medication.

Do dogs need flea medicine year round?

Many pet owners want to stop giving their dogs flea and tick medication during the winter months. However, even in cold climates, veterinarians universally recommend continuing treatment all year long.

Do older dogs need more protein?

According to many leading veterinarians and veterinarian schools, the current thinking is that older pets will actually require MORE protein than younger pets (see below for references). Indeed, senior dogs need ample amounts of high quality protein in order to maintain muscle mass and proper organ and immune function.

Do older dogs need senior food?

The older dog will need a good, well-balanced diet that is lower in calories, higher and fiber, and has adequate protein and fat. For some older dogs, you can continue to feed their regular food, but in a smaller quantity. Specially formulated senior diets are lower in calories and help to create a feeling of fullness.

Do older dogs need less food?

The older dog will need a good, well-balanced diet that is lower in calories, higher and fiber, and has adequate protein and fat. For some older dogs, you can continue to feed their regular food, but in a smaller quantity. Specially formulated senior diets are lower in calories and help to create a feeling of fullness.

Do dogs need flea medicine every month?

Many pet owners want to stop giving their dogs flea and tick medication during the winter months. However, even in cold climates, veterinarians universally recommend continuing treatment all year long.

Do dogs really need heartworm pills?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos.

Do indoor dogs need heartworm prevention?

Cats and Ferrets: Indoor Pets Need Heartworm Prevention Medication, Too. Even if your pet rarely or never goes outside, she should still take a heartworm prevention medication. Mosquitoes that transmit heartworms can easily access the indoor environment (and therefore your pet) through open doors and windows.

How often do dogs need heartworm pills?

Dogs should be given heartworm pills on the same day of each month. The first dose will kill any existing heartworm infestations and protect your pet for the next month. Most vets recommend that you give your dog heartworm pills year-round.

Does heartworm medicine kill all worms?

Monthly heartworm medications work by killing heartworm larvae before they develop into adults. In addition to heartworms, many of these products kill other parasitic worms such as roundworms, hookworms and whipworms, as well as other insects and parasites such as fleas, ticks and mites.

Can I buy heartworm medicine online?

Where can I buy Heartgard Plus for dogs? Although Heartgard and other heartworm medicines require a prescription, at 1-800-PetMeds, we make the ordering process easy. Our pharmacy department will verify your pet's prescription for you by calling or faxing your veterinarian.

Do dogs need heartworm test every year?

The medicine does not stay in your dog's system more than a day. The American Heartworm Society recommends monthly heartworm preventative all year around and testing once a year. This means it will not turn positive unless your dog has been infected for at least 6 months.

How often do dogs need heartworm medication?

Dosing Schedule. Dogs should be given heartworm pills on the same day of each month. The first dose will kill any existing heartworm infestations and protect your pet for the next month. Most vets recommend that you give your dog heartworm pills year-round.

Do older dogs still need shots?

Dogs older than seven years of age are considered senior pets. Typically, senior pets will receive most vaccines every three years. Some vaccines with shorter duration of immunity such as kennel cough, leptospirosis, or Lyme disease vaccines may be given more frequently (every six to twelve months).

Do dogs need heartworm every month?

April is National Heartworm Awareness Month as designated and promoted by the American Heartworm Society, which recommends that every pet owner "… '[T]hink 12:' (1) get your pet tested every 12 months for heartworm and (2) give your pet heartworm preventive 12 months a year."

Do older dogs need rabies shots?

In dogs, the core vaccines are distemper, parvovirus, hepatitis and rabies. In cats, they are panleukopenia, calicivirus, rhinotracheitis (herpesvirus), and rabies as required by law.

Do older dogs need soft food?

When it comes to dietary needs, every dog has individual needs, regardless of age. So there's no one easy answer to the question of soft food versus hard food. As your dog gets older, his teeth may become more sensitive, which can make chewing kibble more difficult and even uncomfortable for him.

Do older dogs need less protein?

According to many leading veterinarians and veterinarian schools, the current thinking is that older pets will actually require MORE protein than younger pets (see below for references). Indeed, senior dogs need ample amounts of high quality protein in order to maintain muscle mass and proper organ and immune function.

Do older dogs need yearly vaccinations?

Most animals need only what are known as core vaccines: those that protect against the most common and most serious diseases. In dogs, the core vaccines are distemper, parvovirus, hepatitis and rabies. In cats, they are panleukopenia, calicivirus, rhinotracheitis (herpesvirus), and rabies as required by law.

Do older dogs need more fiber?

That's important for dogs with diabetes. Some senior dogs also have trouble with constipation, so a higher-fiber diet will help them stay regular. Many senior diets have higher-quality protein sources than standard foods. This helps to maintain body weight and muscle mass without putting too much strain on the kidneys.

Do older dogs need parvo vaccination?

Veterinarians typically recommend that puppies be vaccinated for parvo starting at 7-8 weeks of age (earlier vaccines will almost surely be deactivated), and then every three weeks, for a total of three (sometimes four) vaccinations. The recent outbreak of parvo in adult dogs surprises me for a couple of reasons.

What shots do older dogs need?

While the core vaccines — parvo, distemper, adenovirus and most types of rabies vaccines — have been shown to be protective for a minimum of three years (and, in some cases, for seven or more years), noncore, or optional, vaccines for bacterial diseases such as bordetella or leptospirosis don't provide long-term

Do dogs need to take heartworm pills?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. A mosquito will bite an infected animal and then pass the infection onto your dog should it bite him or her.

Do dogs really need heartworm medication?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Do dogs really need heartworm test?

Annual testing of dogs that are on heartworm preventative is not necessary, however. It is not harmful to the dog, only to your wallet, so unless you feel the need to test you should just keep your dog on the preventative.

Do dogs need monthly heartworm pills?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Should I give my dog heartworm medicine every month?

That's why your vet wants you to give your dog heartworm meds every month. But what he likely didn't tell you is that it takes 5 to 8 months for those microfilariae to mature into adult heartworms. Caution: This does not in any way mean you should give your dog his heartworm meds every 5 months.

How often should you give your dog heartworm medicine?

Dogs should be given heartworm pills on the same day of each month. The first dose will kill any existing heartworm infestations and protect your pet for the next month. Most vets recommend that you give your dog heartworm pills year-round.

Can I give my dog heartworm medicine early?

Heartworm medications are highly effective, but dogs can still become infected. If you miss just one dose of a monthly medication—or give it late—it can leave your dog unprotected. Even if you give the medication as recommended, your dog may spit out or vomit a heartworm pill—or rub off a topical medication.

Can I give my dog heartworm medicine without testing?

And why won't your veterinarian give you the heartworm medications without first testing your dog for heartworm infection? Dogs with heartworms can have a severe, possibly life-threatening reaction to the dying, circulating microfilariae (adult heartworm offspring) if given these heartworm medications.

What is the best heartworm medicine for dogs?

Trifexis is one of the leading oral combination heartworm preventatives. It is a once a month chewable tablet that prevents heartworms, kills adult fleas and also prevents hookworms, roundworms and whipworms. Sentinel Spectrum does the same, with the added benefit of preventing tapeworms.

What is the safest heartworm medicine for dogs?

The most common preventative drugs for heartworm are ivermectin (Heargard®), milbemycin (Interceptor®) and selamectin (Revolution®). While these drugs are generally safe and effective, there are always exceptions.

Is it safe to give your dog heartworm medicine?

Once they develop into adult heartworms, however, it's dangerous to use those meds to treat your dogs. Caution: This does not in any way mean you should give your dog his heartworm meds every 5 months. But it does allow you to replace those dangerous meds with well-timed testing!

What months should I give my dog heartworm medicine?

I generally recommend that owners give heartworm prevention 12 months a year, and here's why: In many parts of the country, mosquitoes remain active year-round. Unless you live in an extremely cold and/or dry region, your dog or cat may be bitten during any month of the year.

Should I be giving my dog heartworm medicine?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

What happens if you give heartworm medicine to a dog with heartworms?

Dogs with heartworms can have a severe, possibly life-threatening reaction to the dying, circulating microfilariae (adult heartworm offspring) if given these heartworm medications. This can happen even if you continue to give heartworm medication because those medications kill only early stage larvae.

How often should I give my dog heartworm medicine?

Dogs should be given heartworm pills on the same day of each month. The first dose will kill any existing heartworm infestations and protect your pet for the next month. Most vets recommend that you give your dog heartworm pills year-round.

Can I give my dog heartworm medicine every other month?

Treatment every three months should be effective no matter where you live. Even treating your dog monthly for six months is unnecessary, Kerasote wrote. If your dog gets stung by an infected mosquito on June 1, the larvae will not grow into adult heartworms for a couple of months.

Should I give my dog heartworm medicine all year round?

I generally recommend that owners give heartworm prevention 12 months a year, and here's why: In many parts of the country, mosquitoes remain active year-round. Unless you live in an extremely cold and/or dry region, your dog or cat may be bitten during any month of the year.

Should I get heartworm medicine for my dog?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. But there are many pet owners who do not use heartworm preventatives on their dogs.

Can I start my dog on heartworm medicine without testing?

Puppies under 7 months of age can be started on heartworm prevention without a heartworm test (it takes at least 6 months for a dog to test positive after it has been infected), but should be tested 6 months after your initial visit, tested again 6 months later and yearly after that to ensure they are heartworm-free.

Can you give a dog heartworm medicine without testing?

And why won't your veterinarian give you the heartworm medications without first testing your dog for heartworm infection? Dogs with heartworms can have a severe, possibly life-threatening reaction to the dying, circulating microfilariae (adult heartworm offspring) if given these heartworm medications.

Is it necessary to give your dog heartworm medicine?

These preventatives are essentially treatment for heartworm, not a preventative. In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos.

Can you give your dog heartworm medicine without testing?

It's important to never give Heartgard to any pet that has not been tested for heartworm disease. Heartworm preventative medication such as Heartgard cannot kill adult heartworms, but instead kills the baby heartworms known as microfilariae.

Can I give my dog expired heartworm medicine?

According to The Pet Center, the expiration date on all dog medications is the date after which the product can no longer be legally sold, but heartworm medication can still be used in the first few months after that date.

What happens if you give a dog with heartworms heartworm medicine?

Dogs with heartworms can have a severe, possibly life-threatening reaction to the dying, circulating microfilariae (adult heartworm offspring) if given these heartworm medications. This can happen even if you continue to give heartworm medication because those medications kill only early stage larvae.

Can you give a dog heartworm medicine if they have heartworms?

Dogs with heartworms can have a severe, possibly life-threatening reaction to the dying, circulating microfilariae (adult heartworm offspring) if given these heartworm medications. This can happen even if you continue to give heartworm medication because those medications kill only early stage larvae.

Does my dog need heartworm?

In fact, if a dog has a mild heartworm infestation, a veterinarian might recommend treating it with a heartworm preventative over a course of several months. Dogs are infected with heartworms by mosquitos. A mosquito will bite an infected animal and then pass the infection onto your dog should it bite him or her.

Can I give my dog heartworm medicine late?

A: Give the dose you missed immediately, then continue giving the medication on the day you've always given it. If the missed dose is more than 2 weeks late, your dog should be tested for heartworm again in six months (click here to learn why).