How Often Can You Give Your Dog Benadryl? Dogs can be given Benadryl every eight to 12 hours (two to three times a day). Are there Alternatives to Giving a Dog Benadryl?
How often can I give my dog Benadryl? You should give your dog Benadryl two to three times a day, or in other words every 8-12 hours. Do not exceed this limit.

To give a dog Benadryl, give it 1 milligram per pound it weighs. For example, if your dog weighs 14 pounds, you can give it 14 milligrams of Benadryl every 8 hours.

How often can I give my dog Benadryl? What is Benadryl an effective treatment for? And when (and under what circumstances) should you give Benadryl to your pup?

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Dogs should never be given time-released drug capsules. Your dogs stomach works differently from yours, and a capsule that works well for humans may overdose your dog. Plus, if they bite the capsule, they may get the entire dose at once instead of it being spread out over time.
Dogs. Can I give my dog Benadryl?When NOT to Use Benadryl in Dogs. You should always check with your vet if Benadryl is the right choice for your dog. There may be other medications that work better, for example, in atopy (long-term, ongoing allergies).