Is Chamomile Tea Safe for Dogs to Drink?
A vet clinician walks through when chamomile tea is genuinely low-risk for a dog, when it isn't, and why it still shouldn't replace a real calming plan.
In a small, plain, cooled cup, chamomile tea is usually fine for a healthy dog — but "usually fine" is not the same as "a calming plan."
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Start here: if your dog just lapped a few unsupervised sips from your mug, you probably don’t need to call anyone. If you’re weighing whether to brew a batch on purpose — for a dog who paces before storms, or won’t settle at night — that’s a different question, and it deserves a different answer.
Do this first. Check what’s actually in the cup. Plain, single-ingredient chamomile tea (no honey, no citrus oil, no artificial sweetener, no caffeine blend) made from German chamomile — the type most tea bags use — is the version with the better safety margin. VCA Animal Hospitals lists chamomile as an herbal supplement used in dogs “as a sedative, an anti-inflammatory, and a muscle relaxant,” given orally in liquid, powder, or capsule form, or applied topically for skin inflammation. That’s a real, established use — not a folk remedy dreamed up on a pet blog.
I once had a Cavalier King Charles Spaniel come in — Biscuit, eleven years old, fourteen pounds — whose owner had started giving him a few tablespoons of cooled chamomile tea most evenings after reading that it might take the edge off his nighttime pacing. He’d been diagnosed with mild mitral valve disease the year before, and she was, understandably, nervous about adding anything new. We talked through his current medications, confirmed nothing on the label of his heart medication raised a red flag with tannic or volatile compounds, and agreed she could keep the small evening cup as long as she watched his gums and stool for the first week. Nothing changed except that he settled a little faster at bedtime — one dog, one household, not a study result, but it’s the kind of low-stakes trial I’m comfortable walking an owner through when the dose stays small.
Where the actual risk lives
The caution isn’t really about the tea bag on your counter — it’s about dose, species of chamomile, and what else is going on with your dog. The ASPCA lists Roman chamomile as toxic to dogs, naming the volatile oil, bisabolol, chamazulene, anthemic acid, and tannic acid as the compounds of concern, and its documented signs in dogs are “[c]ontact dermatitis, vomiting, diarrhea, anorexia, allergic reactions,” with long-term use potentially leading to bleeding tendencies, per the ASPCA. That’s a meaningfully different risk profile from a weak cup of German chamomile tea, and it’s part of why “is chamomile safe” doesn’t have a single yes-or-no answer — it depends which plant, how concentrated, and how often.
A few groups should skip it, or only use it under direct veterinary guidance:
- Dogs with known allergies to ragweed, daisies, or marigolds. Chamomile is in the same plant family, and cross-reactive contact dermatitis or an allergic flare is a realistic outcome, not a theoretical one.
- Dogs on NSAIDs, sedatives, or blood thinners like warfarin. VCA specifically flags these as categories where a veterinarian should be told about concurrent chamomile use before it’s added.
- Pregnant or nursing dogs, very young puppies, and debilitated or elderly patients with other health issues. These are exactly the populations where “probably fine” isn’t a good enough standard.
- Cats in the household who might also get into it. Cats are more sensitive to chamomile’s effects than dogs, so a shared household cup is a bad idea even if the dog handles it well.
What to actually do if you’re going to try it
If your dog has none of the flags above and your vet is comfortable with it, here’s the sequence I’d walk an owner through, step by step, not all at once:
- Brew it weak and plain. One tea bag steeped for a shorter time than you’d drink it yourself, with nothing else added — no honey, no lemon, no artificial sweeteners (some contain xylitol, which is genuinely dangerous for dogs on its own).
- Cool it fully before offering it. A hot cup risks a scalded mouth long before it risks anything from the chamomile itself.
- Start with a tablespoon or two for a small dog, more for a large one, and stop there. This isn’t a bowl of water substitute — it’s a small, occasional addition.
- Watch the first attempt closely. Loose stool, vomiting, facial swelling, or unusual itching in the following few hours means you stop and call your vet, not a dose you push through.
- Don’t make it a daily ritual without a conversation. Occasional use is a different risk category than a standing evening habit, especially for dogs on other medications or with a bleeding-risk history.
That sequence matters more than the ingredient itself. Most of the trouble I’ve seen with herbal “just try it” remedies isn’t the plant — it’s skipping straight to daily use without checking what else the dog is on, or missing that a “calming tea” from the pantry is a mixed blend rather than plain chamomile.
How it stacks up against the calming ingredients with more data behind them
Chamomile’s evidence base in animals is thin compared to how often it’s recommended. A recent review notes plainly that “for the remaining species, evidence is derived mainly from preclinical studies or traditional use” when it comes to chamomile and anxiety — which is a polite way of saying the human and lab-animal data doesn’t translate cleanly into a documented canine dose or a controlled trial in dogs, according to a Biomedicines review. That doesn’t make chamomile useless; it makes it a low-stakes, traditionally-used option rather than a clinically proven one.
Two ingredients I bring up more often when an owner wants something with a firmer evidence trail: a systematic review found that ashwagandha “has a moderate positive impact on stress reduction and cognitive performance” across multiple randomized trials, according to a Cureus systematic review — read the fuller breakdown in our guide to ashwagandha for dogs. L-theanine has human trial data too, though it’s narrower than owners often assume: outside of “one study on psychotic anxiety (SMD = 0.54; 400 mg/day for 8 weeks),” the broader anxiety evidence is more limited than the marketing suggests, per a Molecular Psychiatry review. If you’re comparing calming options side by side rather than deciding about tea specifically, our dog anxiety supplements guide and our scored roundup of calming supplements go through the doses and testing standards worth checking on a label.
I think about an eight-year-old Golden Retriever named Otis whose owner had tried chamomile tea for his thunderstorm anxiety for two summers running, with modest results at best — he’d still pant and pace through the worst of a storm, tea or no tea. When we sat down and mapped out an actual protocol — a sound-desensitization plan, a snugger-fitting wrap for the storm itself, and a supplement with a documented dose rather than a folk-remedy one — the tea stayed in the routine as a small comfort ritual, but it stopped being the plan. That’s the distinction I want owners to leave with: chamomile tea, offered carefully, is a reasonable small gesture. It is not, on its own, a treatment for a genuinely anxious dog.
Where I land
Chamomile tea, plain and weak and cooled, is not something I lose sleep over when a healthy adult dog with no allergy history, no bleeding disorder, and no interacting medication gets a few tablespoons now and then. The counterargument worth taking seriously — that the evidence in dogs is thin and the safety margin narrows fast with the wrong species of chamomile or the wrong dose — is fair, and I don’t dismiss it. It’s why I keep coming back to the same split: fine as an occasional, closely watched gesture; not something I’d build a calming strategy around when better-documented options like ashwagandha or L-theanine exist for owners who want more than tradition behind the recommendation. If your dog’s anxiety is frequent enough that you’re reaching for tea more nights than not, is that still a treat, or has it quietly become your dog’s only calming plan?
Frequently asked questions
Can dogs drink chamomile tea every day?
I'd avoid making it a daily habit without a veterinarian's input. Occasional small amounts are a different risk category than a standing routine, especially for dogs on medications like NSAIDs, sedatives, or blood thinners.
What if my dog drank chamomile tea with honey or lemon added?
Small amounts of honey are usually not a concern, but check the label for anything else — some sweetened or flavored teas include ingredients like xylitol that are genuinely dangerous for dogs regardless of the chamomile.
Is chamomile tea a substitute for a calming supplement?
Not in my experience. It's a low-stakes, traditionally-used gesture with thin evidence behind it in dogs. For a dog with real anxiety, an ingredient with a documented dose and stronger trial data is a better foundation.
Sources
- Chamomile — VCA Animal Hospitals
- Roman Chamomile — ASPCA
- Biomedicines Review (DOI:10.3390/biomedicines14051019) — Biomedicines
- Cureus Systematic Review (DOI:10.7759/cureus.96183) — Cureus
- Molecular Psychiatry Review (DOI:10.1038/s41380-026-03727-9) — Molecular Psychiatry