Valerian Root Versus Chamomile for Calming an Anxious Dog

By Koranda Walsh, VMD, DACVIM (SAIM), DACVP (CP)

Comparisons · August 21, 2026 · 5 min read

Chamomile has a plausible mechanism and a cleaner safety margin; valerian works for some dogs but needs a bloodwork-aware owner.

A nine-year-old miniature schnauzer named Otto came into my exam room last October because his owner couldn’t get him through Fourth of July fireworks anymore — he’d started drooling and pacing the moment the first distant pop went off, sometimes twenty minutes before she could even hear it. She’d read that valerian root and chamomile were both “natural” options and wanted to know which one to reach for. Otto was on a low-dose thyroid supplement and had mild elevations on his last liver panel, which mattered more to my answer than either herb’s reputation did. That’s usually where this conversation actually needs to start — not with which herb sounds gentler, but with what’s already going on in the dog in front of you.

The premise I want to test before I pick a side

The common assumption is that valerian root and chamomile are roughly interchangeable “calming herbs” — pick whichever your dog will eat. I don’t think that premise survives contact with the label or the literature. They work through different mechanisms, they carry different interaction risks, and the evidence quality behind each one is not the same. Read the label and the bloodwork before the claim, not after you’ve already committed to a chew.

What valerian root is actually doing

Valerian’s proposed calming effect comes from compounds that interact with GABA pathways in the brain, the same inhibitory system many prescription anxiolytics target — which is exactly why it deserves respect rather than casual dosing. According to PetMD, controlled studies on valerian specifically in dogs don’t exist; the recommendations veterinary herbalists give are extrapolated from human and small-mammal research plus clinical anecdote. That’s not disqualifying — plenty of useful veterinary practice runs on extrapolated evidence — but it means dosing ranges are wide and imprecise, and PetMD notes dried valerian doses cited in herbal medicine guidelines span roughly 1 to 7.5 grams, without clinical trial validation behind that range.

The interaction profile is the part I actually worry about clinically. Valerian can potentiate sedatives, anti-epileptic drugs, and anti-fungal medications, and it’s generally advised off the table for two weeks before anesthesia. If a dog is on gabapentin, trazodone, or a seizure protocol, or has surgery scheduled, valerian isn’t a neutral add-on — it’s a variable that changes how those other drugs behave. That’s the kind of thing a lab panel and a medication list catch and a product review never will.

Where chamomile’s evidence actually stands

Chamomile’s case rests on apigenin, a flavonoid that binds GABA-A receptors in a way that’s reasonably well characterized in human pharmacology, plus a long history of veterinary use and some human trial data supporting mild anxiolytic effects. Direct canine research is still thin — the honest read is that chamomile has surprisingly little dog-specific data given how widely it’s used — but the safety margin is where it separates itself from valerian. Chamomile doesn’t carry the same anesthesia-interaction warning, and adverse reports are mostly limited to dogs with ragweed or daisy-family sensitivities reacting to it.

That combination — plausible mechanism, wide margin of safety, low interaction burden — is why I default to chamomile first for situational anxiety in dogs without a complicating medication list, the same logic I’d apply comparing ginger versus chamomile for a dog’s car sickness: pick the option with the cleanest interaction profile when the direct evidence is thin on both sides.

Weighing the two honestly, not diplomatically

If I only get to defend one answer, it’s this: chamomile is the better default for a healthy, unmedicated dog with situational anxiety, and valerian is a second-line option reserved for dogs who don’t respond to chamomile and who have a veterinarian actively screening their medication list and bloodwork. The counterargument I hear most is that valerian’s GABA mechanism is stronger and more direct, and some owners report it working when chamomile didn’t — I don’t dismiss that; individual response varies, and I’ve had valerian succeed where chamomile didn’t touch the anxiety. But “stronger mechanism” cuts both ways when the interaction data is this sparse; a more potent, less-studied compound is exactly the one you want a vet looking at labwork before you commit to, not the one you grab off a shelf because it sounds more serious.

In my practice, the dogs who do best on either herb are the ones whose owners treat it as one piece of a bigger plan rather than a fix on its own. I’ve watched owners load up on a calming chew and skip the actual desensitization work, then wonder why nothing changed by the third thunderstorm season. The herb buys you a calmer baseline to work from — it doesn’t replace counterconditioning, a predictable routine, or, in dogs with real clinical anxiety, a conversation about whether an herb is even the right tool versus a prescribed medication. Otto’s owner and I ended up starting with chamomile given his existing thyroid supplement and liver values, with a plan to reassess before the next fireworks season if it wasn’t enough.

What a supplement label actually tells you

Neither valerian nor chamomile is regulated the way a drug is, which means the label is doing a lot of the safety work a clinical trial would otherwise do. Look for a product that discloses milligrams per serving rather than a proprietary blend, and check whether the company carries the NASC Quality Seal, which means the manufacturer has passed a third-party audit covering ingredient sourcing, manufacturing controls, and adverse-event reporting. It doesn’t guarantee the product will calm your dog — no seal can promise that — but it does mean what’s on the label is reasonably likely to be what’s in the bottle, which matters enormously when you’re already working with imprecise dosing ranges. For dogs already on anxiety-adjacent medication, that same label-first instinct is worth applying before switching from something like Benadryl to a natural calming supplement too.

Your checklist before you reach for either one

• Pull the current medication list first — sedatives, anti-epileptics, antifungals, and any upcoming anesthesia change the calculus for valerian specifically.
• Default to chamomile for a healthy dog with situational anxiety and no complicating prescriptions; it has the wider safety margin even with thinner canine-specific data.
• Reserve valerian for dogs who don’t respond to chamomile, ideally with a veterinarian aware of the dog’s bloodwork and other medications.
• Choose a labeled product with disclosed milligrams and, where possible, an NASC Quality Seal rather than a proprietary blend.
• Treat either herb as support for a behavior plan — routine, desensitization, and environment — not a replacement for one.
• If anxiety is severe, frequent, or worsening, that’s a conversation for prescribed treatment, not an herbal aisle.