Q:

How long does it take for Benadryl to make a dog sleepy?

A:

Quick Answer

A dog becomes sleepy within 60 minutes from administration of a properly sized dose of Benadryl, according to AZVets.com. Peak levels of the active ingredient diphenhydramine are found in blood circulation within one to five hours, as noted in The Merck Veterinary Manual.

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Full Answer

Proper dosage of Benadryl is 2 to 4 milligrams per kilogram of pet weight, as prescribed by The Merck Veterinary Manual. This agrees with the simple rule of 1 milligram per pound recommended by AZVets.com and DoseMyPet.com. As an example, a 30-pound dog should be administered 30 milligrams of Benadryl in a proper dosage.

Some over-the-counter products containing Benadryl also contain other medications that are toxic to canines, including acetaminophen or pseudoephedrine. AZVets.com recommends checking labels closely and obtaining the advice of a veterinarian before administering any drug to a dog.

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Related Questions

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    Can I give my puppy Benadryl?

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    According to veterinarian Dr. Kara McCarty, it is safe to give a puppy Benadryl. Puppies are dosed at 1 milligram of Benadryl per pound of body weight three times a day. A 10- to 12-pound puppy can receive half of a 25 milligram Benadryl tablet three times per day.

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    What is the recommended Benadryl dosage for dogs?

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    The recommended Benadryl dosage for adult dogs is 1 milligram per pound of body weight every eight hours, according to Veterinary Place. Owners can double the amount if necessary, but they should always consult a veterinarian first since dosages can vary depending on the dog’s breed and medical history.

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    What are the side effects of Benadryl in canines?

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    Common side effects of Benadryl in canines include the presence of dry mouth, a loss or decrease in appetite with or without vomiting, diarrhea and a decrease in urine according to PedMD. Benadryl has been known to react with other prescription medications like amitraz, furazolidon and epinephrine. Special precautions must be taken when administering Benadryl, especially to pregnant canines and canines with heart diseases or high blood pressure.

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    Is it safe to give cats benadryl?

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    It is safe to give cats Benadryl as long it is administered in a safe dose, according to Pet MD. However, Benadryl works best as a preventive medicine for cats with asthma or other environmental health problems. Benadryl is commonly given to cats for problems such as allergies, increased serotonin production and appetite loss.

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