Chamomile for Dogs: Calming, Skin & Digestive Benefits

The Two Chamomiles: Which One Are We Talking About?

Before reviewing the evidence, a necessary clarification: two plants are commonly sold as "chamomile." Matricaria chamomilla (German chamomile) is the one with the best research behind it and is most commonly used medicinally. Chamaemelum nobile (Roman chamomile) shares some properties but has a different alkaloid profile. Most veterinary and human clinical research specifies German chamomile, and this article does the same unless noted otherwise.

Chamomile's primary bioactive compounds include (-)-α-bisabolol, apigenin, and the characteristic blue compound chamazulene (formed during steam distillation of the essential oil). Each has distinct pharmacological activity. Apigenin binds to benzodiazepine receptors in the central nervous system — the same target as drugs like diazepam — though with far weaker affinity and a gentler anxiolytic effect. Bisabolol has well-documented anti-inflammatory and anti-spasmodic activity on smooth muscle, which is relevant to its GI effects. Chamazulene is the primary driver of chamomile's anti-inflammatory action when applied topically.

Anxiety and Calming: What the Evidence Shows

The anxiolytic effects of chamomile have been studied more thoroughly in humans than in dogs. In a double-blind randomised controlled trial in people with generalised anxiety disorder, standardised chamomile extract (1500 mg/day) significantly reduced anxiety scores compared to placebo over 8 weeks. Long-term use (up to 26 weeks) also reduced relapse rates upon discontinuation. These are meaningful findings, though extrapolation to dogs requires care given interspecies differences in receptor pharmacology.

In dogs specifically, controlled trials examining chamomile's anxiolytic effects are limited. A small pilot study examining herbal blends for noise-averse dogs included chamomile as one component, but the multi-ingredient design prevents attribution of effects to chamomile alone. Chamomile appears in many commercially available "calming" supplements for dogs — usually as dried herb powder or an extract — but most of these products lack clinical trial evidence and rely on the human literature for support.

What we can reasonably infer is that chamomile's apigenin content may provide mild sedation at appropriate doses. It is not a replacement for prescription anxiolytics in dogs with severe anxiety disorders (separation anxiety, noise phobia, storm phobia), but it may provide marginal benefit for mild situational stress. The honest position is that evidence directly in dogs is sparse.

Digestive Benefits

The GI applications of chamomile are better supported mechanistically. Bisabolol and flavonoids in chamomile relax smooth muscle in the gastrointestinal tract, reducing intestinal cramping and spasms — a well-established spasmolytic effect confirmed in ex vivo and animal model studies. This makes chamomile tea a traditional remedy for colic, gastroenteritis, and irritable bowel in humans, with genuine pharmacological plausibility.

In dogs, chamomile tea (prepared as a weak infusion, cooled) or chamomile extract is sometimes used by integrative veterinarians to manage mild gastritis, flatulence, and stress-related GI upsets. There are no large controlled trials in dogs, but the mechanistic basis is solid and the safety profile acceptable at moderate doses. A 2011 review in Molecular Medicine Reports summarising chamomile's GI pharmacology concluded that its spasmolytic and anti-inflammatory effects on the gut lining are among its best-evidenced actions.

Chamomile should not be used as the primary treatment for vomiting, diarrhoea, or any GI presentation that persists beyond 24–48 hours, involves blood, or occurs in puppies, elderly dogs, or immunocompromised animals — all of which warrant prompt veterinary evaluation.

Skin and Topical Applications

Chamomile's anti-inflammatory properties make it genuinely useful topically. Chamazulene, produced from matricine during the preparation of chamomile essential oil, is a potent anti-inflammatory compound that inhibits COX-2 and 5-LOX pathways — the same inflammatory enzymes targeted by pharmaceutical anti-inflammatories. Bisabolol promotes wound healing and has demonstrated anti-pruritic (anti-itch) activity in several studies.

In veterinary dermatology, chamomile preparations (typically as a dilute infusion or a cream containing standardised chamomile extract) have been used to soothe mild hot spots, contact dermatitis, and post-grooming skin irritation. These uses are low-risk and have modest evidence behind them in both humans and dogs. A 1994 study in Skin Pharmacology demonstrated that chamomile cream was significantly better than hydrocortisone 0.5% cream for reducing skin inflammation in a comparative trial — a notable finding for a natural product.

Important caveat: chamomile is in the Asteraceae family, and dogs with allergies to other Asteraceae plants (ragweed, chrysanthemums, echinacea, dandelion) may react to chamomile. Always patch-test topical preparations on a small area before widespread use, and discontinue if redness, swelling, or increased scratching occurs.

Safety Considerations

Chamomile is generally well-tolerated in dogs at low to moderate doses, but several considerations apply:

• Asteraceae allergy: As noted, cross-reactivity with other plants in this family is possible. This is the most clinically relevant safety concern for topical use.
• Anticoagulant interaction: Chamomile contains coumarin compounds. At typical supplemental doses this is unlikely to be clinically significant, but dogs on anticoagulant therapy should not receive chamomile without veterinary guidance.
• Pregnancy: Chamomile's uterine-stimulating properties (documented in rodent studies) suggest it should be avoided in pregnant dogs.
• Essential oil vs. tea vs. extract: These are not equivalent. Chamomile essential oil is highly concentrated and can be toxic orally; it should never be administered internally. Chamomile tea or standardised aqueous/ethanolic extract are appropriate for internal use at correct doses. This distinction is frequently confused in online resources.

Dosage Guidance

• Chamomile tea (internal, for GI support): A weak infusion (1 chamomile tea bag or 1 tsp dried flowers per 250 ml hot water, steeped 10 min, cooled) — approximately 1–3 ml/kg body weight, up to twice daily. Not suitable for long-term daily administration without veterinary guidance.
• Standardised extract (oral): Follow product-specific dosing. Extracts should specify apigenin or bisabolol content. Products without standardisation data are not recommended for therapeutic use.
• Topical: Dilute chamomile infusion (10–15 min steeped, cooled) applied as a compress; or a cream containing standardised chamomile extract (e.g., 1–2% bisabolol). Apply 1–2 times daily to affected area.

Written by Sarah Bennett, Certified Animal Nutritionist. Last reviewed June 2026. This article is for informational purposes only and does not constitute veterinary advice.