What happens if you give a dog benadryl?

If you have ever found yourself wondering how to cure your furry friend’s allergies, then look no further – benadryl could be the solution you need. Many people use this medication to deal with common ailments such as hay fever or allergic reactions, but can our four-legged companions benefit from benadryl too? In this article, we will explore what happens if you give a dog benadryl.

Understanding Benadryl

Benadryl, also known by its brand name diphenhydramine hydrochloride is an antihistamine commonly used in human medicine for various conditions such as allergies and motion sickness. The main job of antihistamines like benadryl is to block histamines – natural chemicals involved in causing allergy symptoms when they interact with certain cells. By blocking them, antihistamines prevent many symptoms that make us humans (and sometimes dogs) feel miserable – sneezing, itching or runny nose just to name a few.

The reason some vets recommend using it on dogs because they share similar issues with us humans around allergens among other compounds and their immune systems often react similarly by releasing histamines which cause those annoying symptoms like watery eyes etc. As long as one follows instructions and doses rightly it should help soothe their pet’s overreactive histamine response without any significant side effects.

How Much Benadry Can I Give My Dog?

When giving benadyrl to pets there are important factors that determine safe dosages :weight along with overall health status . The normal dosage recommended by most veterinarians including the American Kennel Club ranges between 0.5-2mg per pound given orally up-to three times daily Table below summarized:

Weight of Pet Dosage
Less than 30lbs 10mg
Over 30lbs 25 – 50 mg

It is important to note that a higher dose than recommended can lead to complications, including severe nervous system depression resulting in seizures or comas.

Can Benadryl be Harmful for Dogs?

Although benadryl is generally safe and effective when used according to the suggested dosages and instructions of a veterinarian, there are some reported side effects.

  • Sedation: One of the main side effects of Benadryl is sedation. Some dogs may become sleepy after taking it
    and this could prove advantageous if you giving at night since this medication also has antianxiety properties.
  • Dry Mouth & Dry Nose: Like humans, dogs might experience dry mouth and/or dry nose as an effect from using benadryl. This usually wears off once its metabolized within your pet’s body.
  • Digestive Problems: instances where dog’s digestive systems are sensitive certain medications such can cause upset stomachs or even loose motions
  • Other uncommon side effects include weakness/confusion , difficulty urinating (in male dogs), crying/ vocalization amongst others

To avoid these more serious issues with misusing benadyrl; consult nearby animal expert before administering it yourself – self-diagnosing animals when unsure will just do more harm than good .

Knowing When Your Dog Needs Benadayr

Are you sure that your furry bundle-of-love needs benadyrl? Remember that allergies aren’t the only problem which we utilize Benadry for… Any issue along those lines such as insect bites or hives/welts does actually counts too!

As well anything indicating reasons where mild sedatives would aid calm pets like thunderstorms etc should indicate using secondary benefits from antihistamines . Nevertheless still always monitor how often you provide medication to ensure they don’t become dependent on them every time a given issue arises.

Benadyrl Overdose in Dogs

While misusing any drug can have harmful effects, when it comes to benadryl an overdose ll pose potential nervous system problems that are life threatening for your canine friend. As highlighted earlier, the recommended dosages fall between 0.5-2mg per pound given orally up-to three times daily , or as directed by a veterinarian.Here are common symptoms to look out for if you suspect
your furry pal has ingested an excessive amount of Diphenhydramine :

  • Drowsiness/confusion hence difficulty breathing
  • Fast heart rate and tremors characteristically within minutes after taking;
  • Dehydration due drooling from dry mouth occurring .

These conditions can quickly lead to coma or seizures requiring immediate medical attention to avoid fatal complications . However such obvious cases are extremely rare unless someone intentionally gives their dog too much medication .

How long will it take effect in dogs?

The ultimate goal is relieving symptoms caused by allergic reactions /similar issueswith dogs thus how quickly diphenhydramine takes action does vary depending on certain factors : type of reaction,stomach/fullness upon administration,half-life of particular medication – both owner/dog should pay careful attention concerning signs/symptoms after first usage.

Symptom relief typically begins within 30 minutes – 60 Minutes after administrating the proper dosage; but don’t worry! If you do not see any noticeable improvements even until two hours later this still qualifies as “normal”. Don’t go giving more than what initially suggested since using extra doses may result in significant harm outlined above especially with regards sedation/overactive nervous systems which spontaneously could lead seizures/coma!

## What about additional medication?

If need be one doesn’t necessarily cancel off other treatment regiment once they begin administering antihistamines like benadryl… It’s okay combining them with other drugs – this means both the primary treatment and antihistamine can still go hand-in-hand if deemed suitable by the veterinarian; this could even help in achieving greater symptom control!


In conclusion, benadryl is safe for dogs when used responsibly. It has many benefits such as assisting in calming anxious pets down while at same time giving relief to issues on allergies or insect bites and stings. However before jumping into administering it please consult with a certified an animal expert especially concerning dosage guidelines due to unique factors different from your dog which are always considered beforehand hence ensuring safety/efficacy of medication . Remember exactly relevant conditions & symptoms should be treated first-step towards establishing their underlying causes so they can’t happen frequently again!

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