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Concerned for my dogs health- I asked myself where to buy Sentinel for dogs online without vet prescription? Previously, I was able to purchase this with an RX prescription from my veterinarian, but I didn’t want to go through the hassle of waiting in line. So I decided to search online for the solution. Fortunately, I found a trusted online company to not only buy Sentinel online, but other dog medication. The best part was I was able to buy Sentinel for my dog at the lowest price- without a coupon code, discount or any sort of rebate.

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What is Sentinel?

The Sentinel Flavor Tabs guards your dog against intestinal parasites and heartworm disease. It is a prescription medication that is FDA-approved. It offers broad-spectrum protection as it prevents, controls, and treats worm infections. Not only is it a parasite preventative, it also inhibits maturing of flea eggs.

The flavor tablets have the active component milbemycin oxime which destroys the nervous system of the worm and kills the larvae of a heartworm in its immature stage. Moreover, the component kills adult hookworms, whipworms and roundworms.

The Sentinel also includes lufenuron that inhibits the development and growth of the flea egg, thus breaking its life cycle on your dog. The Sentinel does not kill the adult fleas; it only prevents flea eggs from developing. Capstar pills treats flea infestation and the Sentinel can be administered along with it.

The Sentinel Flavor Tabs is for dogs and puppies that are over 4 weeks old and weigh more than 2 pounds. It is safe for pregnant dogs and nursing ones.

Why Sentinel and how does it work?

Advantages of Sentinel for your dog:

–      The Sentinel comes in tablet form for easy administration.

–      The Sentinel Tablets are beef-flavored, which is derived from soy protein and pork and is similar in taste to dog treats. Dogs will love them.

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The Sentinel is given orally on a monthly basis. It is highly recommended that the Sentinel is administered on the same date every month. Most veterinarians recommend that the Sentinel be given the whole year round.

If the Sentinel will be given only during mosquito season, the first dose should be administered within thirty (30) days of your dog’s initial exposure to mosquitoes. Then a last dose will be given within 30 days after the last exposure.

The Sentinel should be given immediately after a meal, or included in a meal. This will ensure absolute absorption for optimum performance. The Sentinel should be given with food because it facilitates the absorption of lufenuron. It can also be given as a treat, but only with a whole meal. The entire dose of Sentinel should be consumed.

The usual Sentinel dogs are the following:

Dog Weight          Color          Dose

2 to 10 pounds     Brown          2.3mg/46mg

11 to 25 pounds    Green       5.75mg/115mg

26 to 50 pounds   Yellow        11.5mg/230mg

51 to 100 pounds  White       23mg/460m

The active ingredients in the Sentinel enter the dog’s pores. They become stored in the fat cells in the blood and when the living parasites ingest the blood, they ingest a dose of the medication. This affects their health and causes the immature heartworms to die.

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If a dose is missed, you need to administer the missed dose as soon as you recall. You should never give a double dose. If an overdose occurs, immediately seek emergency treatment from your veterinarian.

Do not remove the Sentinel out of the wrapper until you are going to administer it. Make sure that the medicine is out of reach of children and your pets.

Sentinel Side Effects

It is important to ask your veterinarian for the right does and to inform him or her if your dog has any medical allergic reactions. After you have given your dog a dose of Sentinel, you need to monitor him or her for side effects in the next day or two.

It is also imperative to let your dog rest after administering the dose and a full meal. Keep the dog from strenuous activity to prevent the possibility of regurgitation. Also make sure that the dog is properly hydrated.

There are rare occasions of side effects caused by the Sentinel. Some of these include: depression, vomiting, drowsiness, loss of appetite, seizures, weakness, hyper salivation or diarrhea. The side effects occur because the milbemycin oxime destroys the baby heartworms in the bloodstream.

Watch out for facial swelling, cold extremities and pale gums. Should these symptoms occur, you should contact your vet and have your dog examined. Severe convulsions, extreme diarrhea and vomiting may also be a sign of overdose.


Dogs may also suffer side effects on their skin such as oily skin, hives or itchy skin. It is best to shampoo the dog with a pet-safe or oatmeal-based shampoo to relieve the skin irritation.  Contact your vet if the situation persists or worsens.

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Roundworms and hookworms may be contracted by humans so proper hygiene and handling should be maintained. To prevent re-infection of intestinal worms, you should not give your dog uncooked fish or meat. You should clean stools daily. It is also necessary to eliminate fleas. Even if it is proven safe, consult your vet if the dog is pregnant or nursing.

You should consult with your vet first if your dog is also taking other medication such as amiodarone (Corarone), carvedilol (Coger), clarithromycin (Biaxin), spironolactone (Adlactone), verapamil (Calan), ketoconazole, erythromycin, cyclosporine, quinidine or tamoxifen. If your dog is taking an alternative medication for heartworm, do not give him/her the Sentinel.

Heartworms in Dogs

Heartworm is a disease in dogs transmitted by mosquitoes that are infected with it. The dog’s bloodstream becomes the hatching ground for the heartworm eggs and they grow in the heart or lungs.

Heartworm testing should be done first before a prevention therapy is commenced. The Sentinel may cause deadly side effects if the dog is already infected with heartworm, such as convulsions and seizures. You need a negative result before you can administer the Sentinel.

Should your dog be off the medication for 6 months, you need to re-start the Sentinel and test again after six months. This is done because the microfilaria takes six months to mature.

Can Sentinel kill Tapeworms??

Infected fleas, rodents and rabbits can pass tapeworms to your dog. If your dog accidentally ingests fleas or an animal that has fleas, he will be infected. An infected dog may not show any symptoms or signs but some dogs suffer from diarrhea, weight loss or a dull coat.

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The Sentinel Flavor Tabs addresses heartworm, whipworm, hookworm and roundworm, and can add protection from tapeworms by preventing the maturing of fleas on the dog’s own body and decreasing its population. However, it does NOT kill tapeworms that are already inside the dog’s body. There are other more effective medications that specifically address tapeworm infestation.