Dramamine for Dogs: Which Box, How Much, and When Your Vet Will Suggest Something Better

By Marc Brannigan and Natalie Mondine, co-founders of HempMy Pet · Published October 24, 2026 · Last reviewed October 24, 2026. We have grown and bottled organic full-spectrum hemp for pets on our own Colorado farm since 2016. We are not veterinarians — everything below comes from the published veterinary sources listed at the end.

Which Dramamine? What's Actually in Each Box

Every product carries the same brand name, but they contain three different things. This is the table to check before anything goes in your dog's mouth.

From the product pages on dramamine.com, checked October 2026. Formulas change — read the inactive ingredients on the box you actually buy, every time, and never give any product that lists xylitol.

How Much Dramamine Can I Give My Dog?

These are the ranges veterinary references publish. Your vet picks the number for your dog — start at the low end.

What that looks like for dimenhydrinate, at 2–4 mg per pound: a 10 lb dog works out to 20–40 mg (roughly one 25 mg Kids tablet); a 25 lb dog to 50–100 mg (one to two 50 mg Original tablets); a 50 lb dog to 100–200 mg. Those are the outer edges of a published range, not a target — many vets start lower, and dogs on other medications or with any of the conditions in the red box may need a different plan entirely. Ring your vet's office before the first trip; it is a two-minute call.

1. Give it 30–60 minutes before the car, not once the drooling starts. VCA notes these drugs take effect within about 1–2 hours and wear off within 24 hours.
2. An empty stomach helps. The AKC suggests withholding food for up to 12 hours before a car trip if you can — but never water. Follow your vet's direction on whether the dose goes with a little food.
3. Expect sleepiness and a dry mouth. VCA lists those, plus difficulty urinating; less often vomiting, diarrhoea or a poor appetite. With meclizine, VCA also lists a fast heart rate and, in some pets, excitement instead of sleepiness.
4. Don't combine it with Benadryl, other antihistamines, sedatives such as trazodone or gabapentin, or other drugs that slow the nervous system, unless your vet has planned it.
5. Allergy skin testing coming up? Antihistamines interfere with it — tell your vet, who will have you stop them days to weeks beforehand.

Dramamine vs Benadryl vs Cerenia: Which Works Best?

The question behind most searches. Here is how the options compare on what actually matters to a dog that gets sick in the car.

The Merck Veterinary Manual names maropitant as the preferred drug for motion sickness in dogs, because blocking the NK-1 receptor is more effective than the older antihistamines. One study found an 86% reduction in vomiting when Cerenia was given two hours before travel. Two caveats worth knowing: stopping the vomiting is not the same as stopping the nausea — Merck notes nausea is harder to control, so a dog on Cerenia may still drool and look miserable — and although Zoetis markets Cerenia as non-sedating, the drug's own label reports drowsiness in 8% of dogs versus 1% on placebo in the European study, and hypersalivation in 12.5% versus 9.7%.

Car Sickness or Car Anxiety? The Answer Changes the Fix

Dramamine, meclizine and Cerenia all target the nausea of motion sickness — none of them is an anxiety medication. The AKC notes dogs get carsick for physical or psychological reasons, and a dog whose early car rides ended in vomiting can learn to dread the car. Many dogs have both, so it is worth working out which one you are looking at.

• Motion sickness looks like: lip licking, yawning, heavy drooling, then vomiting — usually after the car is moving. Common in puppies, whose inner ear is still developing; VCA says puppies often outgrow it by about a year old.
• Car anxiety looks like: panting, whining, trembling, pacing or refusing to get in — often before the engine starts, or at the sight of the car keys.
• Both: a dog that drools and vomits on the drive and also balks at the car door. These dogs usually need the nausea controlled first, then gradual re-training.

Set the car up to help

• Seat: the AKC suggests the middle of the back seat, so your dog is more likely to look forward — or a solid-sided crate that limits the view out of the side windows. Either way, secured.
• Air: the AKC says even a few inches of open window equalises air pressure, which can help nausea. Keep the car cool and ventilated.
• Short and positive: the AKC's approach starts with a few minutes a day in the parked car, then the engine running, then short trips — progressing slowly only once your dog shows no sign of sickness, and going back a step if they do.

Where Hemp Fits — and What the Car-Travel Studies Actually Found

We make hemp treats and oils, and travel stress is a common reason people buy them. Here is the honest version of the evidence.

If your dog's main problem is the stress of the trip rather than the stomach, a pre-measured treat given well before you leave is the simplest way to try hemp — start low, and try it at home first so you know how your dog responds. If your dog takes Dramamine, Cerenia, trazodone or any other medication, talk to your vet first: CBD is processed by the same liver enzymes as many drugs, and one 2024 study found it changed how dogs handled the painkiller tramadol. Our car-travel study breakdown and hemp and dog medications guide go deeper.

When to Skip the Medicine Cabinet and Call the Vet

• Your dog vomits or drools in situations other than the car — that is not motion sickness. Our guide to dog vomiting white foam covers the other causes and the warning signs.
• Your dog has any of the conditions in the red box at the top, takes other medications, is pregnant or nursing, or is a young puppy.
• The sickness is getting worse with age rather than better, or appeared suddenly in an adult dog that used to travel well — new balance problems can come from the inner ear itself.
• A dose of Dramamine didn't help, or caused agitation instead of calm.

Frequently Asked Questions

How much Dramamine can I give my dog?
Only the dose your vet confirms. For dimenhydrinate (Original, Chewable and Kids Dramamine), the Merck Veterinary Manual lists 4–8 mg/kg by mouth every 6–8 hours — roughly 2–4 mg per pound — given 30–60 minutes before travel. For a 25 lb dog that range is 50–100 mg. Meclizine (Less Drowsy Dramamine) uses a different dose. Start at the low end, and call your vet first if your dog has a medical condition or takes other medication.

Can dogs take human Dramamine?
Some versions, yes, under veterinary guidance. Original Dramamine (dimenhydrinate) and Less Drowsy Dramamine (meclizine) are both used off-label in dogs. The Non-Drowsy Naturals product is ginger, not a drug, and has no dog dosing data. Check the inactive ingredients on chewables and never give a product listing xylitol. Avoid it in dogs with glaucoma, seizures, heart disease, hyperthyroidism, prostate or urinary problems, or breathing disease unless your vet approves.

Is Benadryl or Dramamine better for dogs?
For motion sickness, Dramamine (dimenhydrinate) is the more targeted choice — but they are closely related, because dimenhydrinate is a salt of diphenhydramine, Benadryl's active ingredient. Never give both together. Benadryl is mainly used for its sedating effect. For dogs that keep vomiting on trips, vets usually prefer prescription Cerenia (maropitant), which outperformed placebo by a wide margin in its trials.

What is the best medicine for dog motion sickness?
The Merck Veterinary Manual names maropitant (Cerenia) as the preferred drug for motion sickness in dogs. In its US field study, 7% of dogs vomited on Cerenia versus 55% on placebo. It needs a prescription and is given at least two hours before travel. Antihistamines such as dimenhydrinate and meclizine are over-the-counter alternatives but less effective on nausea.

How long does Dramamine take to work in dogs?
VCA notes dimenhydrinate and meclizine take effect in about 1–2 hours, so give the dose 30–60 minutes before the car at the latest — earlier is better. They are short-acting and stop working within 24 hours (longer in pets with liver or kidney disease). Dimenhydrinate can be repeated every 6–8 hours on long trips, as your vet directs.

Will Dramamine calm an anxious dog?
Not reliably. Dramamine targets the nausea of motion sickness; it is not an anxiety medication. It makes many dogs sleepy, which can look like calm, and VCA notes some pets on meclizine get excited instead. If your dog panics before the car even moves, talk to your vet about anxiety-specific options and gradual desensitisation.

Can I give my dog Dramamine and CBD together?
Ask your vet first. There is no study of the two together in dogs. Both can cause drowsiness, and CBD is processed by the same liver enzymes as many drugs — a 2024 study found it changed how dogs handled tramadol. If you use both, your vet should know, and try hemp at home first, separately, so you know how your dog responds.

What are the side effects of Dramamine in dogs?
VCA lists sleepiness, dry mouth and difficulty urinating for dimenhydrinate, with vomiting, diarrhoea and loss of appetite less common. For meclizine it adds a fast heart rate and, in some pets, excitement instead of sleepiness. Seizures or coma may signal an overdose — call your vet or ASPCA Animal Poison Control at (888) 426-4435 immediately.

The Short Version

Original Dramamine (dimenhydrinate) can be used for car-sick dogs at a vet-confirmed dose — the Merck reference range is 4–8 mg/kg every 6–8 hours, given 30–60 minutes before the trip. “Less Drowsy” is meclizine, a different dose; “Non-Drowsy” is ginger, not a drug. Never give it with Benadryl, check the box for xylitol, and call your vet first if your dog has any medical condition or takes other medication. Dramamine helps nausea, not anxiety. For dogs that still vomit, ask about Cerenia — 7% vomited versus 55% on placebo in its field study. Pair any medicine with a better car setup and slow, positive practice runs.

Hemp for Dog Anxiety → Hemp & Dog Medications

Benadryl for Dogs · Trazodone Side Effects · What to Give a Dog for Anxiety · Dog Vomiting White Foam · Car-Travel Study

How We Sourced This Article

Every claim above traces to one of these.

• Merck Veterinary Manual — Antiemetic drugs (dimenhydrinate and meclizine dosing) and Motion sickness in animals.
• VCA Animal Hospitals — Dimenhydrinate, Meclizine and Motion sickness in dogs.
• Zoetis / FDA — Cerenia (maropitant) label and Cerenia owner information. Benchaoui HA, et al. Efficacy of maropitant for preventing vomiting associated with motion sickness in dogs. Vet Rec. 2007. PubMed. Conder GA, et al. Efficacy and safety of maropitant, a selective neurokinin 1 receptor antagonist, in two randomized clinical trials for prevention of vomiting due to motion sickness in dogs. J Vet Pharmacol Ther. 2008. PubMed.
• PetMD — Dramamine for dogs. GoodRx — Dramamine for dogs. American Kennel Club — Dramamine for dogs and Car sickness in dogs.
• Dramamine — product pages for active and inactive ingredients.
• CBD and car travel: Hunt ABG, et al. 2023, PubMed · Flint HE, et al. 2024, PubMed · Flint HE, et al. 2025, PubMed · fireworks: Morris EM, et al. 2020, PubMed.
• Kogan L, Hellyer P, Downing R. The Use of Cannabidiol-Rich Hemp Oil Extract to Treat Canine Osteoarthritis-Related Pain: A Pilot Study. J Am Holist Vet Med Assoc. 2020;58:35–45. Our disclosure: HempMy Pet supplied the hemp extract and reimbursed clinic costs; we had no involvement in any other study cited here.

Spot something that conflicts with your veterinarian's advice? Email support@hempmypet.com and we will correct it.

These statements have not been evaluated by the Food and Drug Administration. Our products are not intended to diagnose, treat, cure, or prevent any disease. This article is general information, not veterinary advice. Dramamine is a human over-the-counter medication not approved for dogs — confirm the product and dose with your veterinarian before giving it.