benadryl for dogs anxiety
Sarah Scott
Updated on July 06, 2026
Benadryl Tablets
According to the Merck Veterinary Manual, the standard dose for Benadryl is 2-4 milligrams per kilogram of body weight, or 0.9-1.8 milligrams (mg) of Benadryl per pound. Therefore, a simple and practical dose is 1 mg of Benadryl per pound of your dog’s weight, given 2-3 times a day.
How long does it take Benadryl to calm a dog?
If using Benadryl as a mild sedative for motion sickness or any sort of thunderstorm or travel anxiety, it’s best to think ahead so you can plan out when you give it to your doggo. It will usually take 30 minutes for Benadryl to take full effect, and you want your pup calm and anxious-free.
What can I give my dog to ease his anxiety?
7 Proven Ways to Calm Your Anxious Dog
Exercise Your Dog. If your dog has separation anxiety, the obvious way to ease their mind is to never leave them alone. Physical Contact. Massage. Music Therapy. Time-Out. Calming Coats/T-Shirts. Alternative Therapies.
Can I sedate my dog with Benadryl?
Benadryl may be a good dog sedative for car travel, as it also helps with mild car sickness. Dry mouth or an increased heart rate are fairly common side effects. Rarely, some dogs will have an atypical response and be excitable rather than sedate.
Can I give my dog 50 mg of Benadryl?
How much Benadryl do I give to a 50 lb dog? You should give 50 mg of Benadryl to a 50 lb dog, either as two 25 mg tablets, four 12.5 mg chewable tablets, or 20 ml of a Benadryl liquid form (12.5 mg/5 ml).
Can I give my dog Benadryl everyday?
For Dogs: Allergy Meds
You can give your dog Benadryl (diphenhydramine) 2-3 times daily at 1mg per pound of body weight. For instance, a 12-pound dog can receive 12mg, which is equal to one children’s Benadryl or ½ an adult dose. A 50-pound dog would need 50mg, or two adult Benadryl. Benadryl may cause drowsiness.
Can I give Benadryl to my dog to calm him down?
One of the side effects of Benadryl is drowsiness, which helps to calm anxious dogs. The Merck Veterinary Manual states that diphenhydramine may relieve symptoms of mild-to-moderate anxiety in pets associated with travel. It also may help relieve motion sickness.
What kind of Benadryl is safe for dogs?
According to the Merck Veterinary Manual, the safe dosage is 2-4 milligrams of medication per kilogram of weight, or 0.9 to 1.8 milligrams per pound. This amount can be administered two to three times daily, depending on your dog’s symptoms.
Should I put my dog on anxiety meds?
If your dog develops a serious anxiety disorder, your veterinarian may recommend medications or natural therapies. SSRIs and antidepressants are occasionally prescribed for dogs with anxiety, including fluoxetine and clomipramine.
How long does it take for Benadryl to kick in?
How long does it take diphenhydramine (Benadryl) to start working? Diphenhydramine (Benadryl) starts to work pretty quickly. You can expect to it to kick in within about 15 to 30 minutes. Its full effects can be felt around 2 hours after your dose.
How can I sedate my dog?
Give your dog melatonin for a natural, over-the-counter option. This natural supplement that many humans take to help them sleep can be helpful for sedating dogs as well. If your dog weighs less than 5 kg (11 lb), give it 1 mg of melatonin. If your dog weighs 5–15 kg (11–33 lb), give it 1.5 mg.