Sentinel for Dogs Frequently Asked Questions

How long does it take for Sentinel to work?

It should start to kill adult fleas and larval fleas within 20 minutes. It will stop fleas from feeding within 5 minutes. It should take about 24 hours though before it will be in full use.

How long does Sentinel work for?

Each Sentinel tablet will last 1 dog for 1 month. If you purchase a 6 pack, that will last 1 dog for 6 months.

How long after using Sentinel can I wash or bathe my dog?

As sentinel comes in the form of a tablet, you can wash, bathe or let your dog swim right away.

How often can I use Sentinel on my dog?

You only need to use Sentinel Spectrum on your dog once a month. You should not use Sentinel any more frequently then once a fortnight. If you notice your dog has fleas before the month is up, you are best to use a flea treatment such as Advantage, Frontline Plus or Capstar.

What does Sentinel treat?

Sentinel prevents heartworm infection. Controls roundworm, whipworm, hookworm and tapeworm. Prevents and controls fleas long-term. Controls flea allergy dermatitis. One Sentinel tablet will treat all of these things for one month.

How long does Sentinel treat for fleas on my dog?

Sentinel will control of flea infestations and flea allergy dermatitis in dogs for 1 month. But please note that Sentinel Spectrum will not kill adult fleas on dogs.

How long does Sentinel treat for heartworm?

Sentinel will prevent heartworm infection for 1 month. You should make sure you treat your dog every month for heartworm with Sentinel or another heartworm treatment. You should have your dog tested for heartworm infection before using Sentinel.

Can I give Sentinel to a cat?

No, you cannot give Sentinel to a cat. If you give Sentinel to a cat contact your vet immediately.

How do you give Sentinel to a dog?

1. Test your dog for heartworm: Before starting Sentinel Spectrum, you should have your veterinarian confirm, by a simple test, that your dog does not have heartworm. 2. Give Sentinel Spectrum with a full meal: Give your dog on Sentinel tablet a month with a full meal. Most dogs will take the tablet from your hand. If this is not the case, try hiding the chew in their food. Be certain that the entire dose is consumed; watch your dog for several minutes after dosing to ensure that this is the case. If the entire dose is not consumed, re-dose as soon as possible with the full dose. 3. Dose monthly: Sentinel Spectrum must be given every month, preferably on the same date each month, to ensure complete protection for your dog.

How often should I use Sentinel?

You should be using Sentinel every month. If you are not using Sentinel every month, you must be using another heartworm treatment monthly.

What do the different color Sentinel packets mean?

Each weight range has a different color packaging to make it easy to remember what type to buy next time if you don't remember your dogs exact weight. There are 4 different colors; Orange for dogs up to 9lbs (up to 4kgs), Green for dogs 9-23lbs (4-11kgs), Yellow for dogs 24-48lbs (11-22kgs) and White for dogs 49-99lbs (22-45kgs).

What are some known Sentinel side effects?

Sentinel Spectrum provide a wide margin of safety in dogs when used according to level directions. Milbemycin oxime has been tested in over 75 different breeds of dogs, including pregnant females, breeding males and females, and puppies fro 2 weeks of age. Satisfactory margins of safety have been demonstrated for both milbemycin oxime and praziquantel when administered during all reproductive phases. Some mild, transient, shock-like reactions have occurred when treating heartworm positive dogs carrying a high number of microfilariae at the time of the first treatment with milbemycin oxime. The following adverse reactions have been reported in dogs after giving milbemycin oxime and lufenuron together in tablet form: vomiting, diarrhoea, depression/lethargy or pruritus. Sentinel Spectrum have been tested in puppies from 6 weeks of age. In safety studies with tested puppies from 6 weeks of age. In safety studies with Sentinel Spectrum, in some cases puppies showed reduced activity, ataxia, tremors and salivation. These signs were most commonly seen with overdosing and were mild, observed only within 24 hours of treatment, and resolved without medical intervention. Contact your veterinarian if any unusual signs develop following treatment with Sentinel Spectrum.

Where can I buy Sentinel online for my dog?

You can buy Sentinel for dogs online here at

If my dog has any side effects to Sentinel what should I do?

If your do has any side effects or adverse reactions to Sentinel Spectrum you must contact your vet immediately.

Have any other questions about Sentinel Spectrum for dogs?

If you have any other questions about Sentinel Spectrum for dogs, you can contact us at

There are no products listed under this category.