Can I give my cat Benadryl?

You can. I don't know why you would, but it almost never works for cats. Typically, we have to give them the liquid, and good luck, because it tastes pretty bad for cats. You'll probably have to be prepared and have some bandaids and a first aid kit handy if you try to give Benadryl to your cat. But basically, no, it almost never works for dogs. I would never recommend that for a cat. You can do it, but why would you?

You could give your cat Benadryl, but we don't recommend it. It doesn't last for very long, only about four to six hours and nobody's ever going to redose their cat every four to six hours with Benadryl. It could cause sleepiness and we would dose it depending on the size of your cat. So even though Benadryl is not particularly unsafe to give a cat, it's not very effective and I would never recommend that you give your cat any over-the-counter medications, even Benadryl, without consulting with your veterinarian.

You can, it's going to make them drool a lot, so we usually use a different antihistamine to help treat those allergens.