Valerian can occasionally produce excitability, uneasiness or a sensation of increased arousal instead of sedation, but the popular explanation that this happens because of specific gene variants has not been established in human research.
If valerian has just left you feeling wired, try this for 60 seconds: sit comfortably and breathe gently through your nose for about 4 seconds in and 6 seconds out. Keep the breaths small rather than deliberately taking huge breaths. This will not neutralize valerian, but slowing respiration can help reduce the autonomic arousal that may amplify awareness of a pounding heartbeat.
If you have severe or persistent palpitations, chest pain, fainting, significant shortness of breath, or a sustained very rapid or irregular heartbeat, however, don’t assume it is merely a valerian reaction—seek appropriate medical evaluation.
First, the Genetics Claim Needs Correcting
It sounds biologically convincing:
Valerian affects GABA receptors, people have different GABA-receptor genes, therefore certain gene variants must make valerian stimulating.
The first two statements have scientific support. The final step has not been demonstrated.
Valerian contains multiple biologically active compounds rather than one simple sedative chemical. One of the best studied is valerenic acid, which can modulate GABA-A receptors. GABA is the brain’s major inhibitory neurotransmitter, and GABA-A receptors help regulate neuronal excitability.
Laboratory and animal experiments also show that valerenic acid’s effects depend on the subunit composition of GABA-A receptors. In one important experiment, altering a particular receptor site substantially reduced valerenic acid’s effects.
That’s interesting pharmacology.
It is not evidence that naturally occurring human genetic variants have been shown to cause valerian-induced racing heart or paradoxical stimulation.
At present, that connection remains a hypothesis, not a clinically established pharmacogenetic effect.
How Valerian Actually Affects the Brain
The useful concept here is GABA-A receptor modulation.
In simple terms:
GABA-A receptor activation → greater inhibitory signaling → neurons become less likely to fire → potentially less arousal
Valerenic acid appears capable of enhancing GABA signaling at particular GABA-A receptor configurations. Importantly, its effects vary according to receptor subtype.
But valerian isn’t simply “natural GABA.”
Valerian extracts contain numerous compounds, and experimental work suggests activity involving more than one signaling system. For example, valerian-derived compounds have demonstrated interactions with adenosine A1 receptors, while valerian extract and valerenic acid have shown activity at the serotonin 5-HT5A receptor in laboratory research.
That makes individual responses harder to predict.
Two products labeled “valerian root” may also differ substantially in extraction method and concentrations of active compounds. Research has found that GABA-A receptor activity varies with an extract’s valerenic-acid content.
So a person’s response reflects an interaction between dose, formulation, other substances, physiology and probably individual biological variation—not simply one gene switching valerian from calming to stimulating.
Why Could Something Sedating Make You Feel More Alert?
There isn’t one proven explanation.
One possibility is an idiosyncratic response: an uncommon individual reaction that differs from the typical pharmacological effect.
Paradoxical responses aren’t unique to herbs. Nervous-system drugs can occasionally produce behavioral effects that appear opposite to their expected action because inhibitory and excitatory networks interact rather than functioning as simple on/off switches.
Another possibility is that valerian isn’t actually producing all of the symptoms attributed to it.
Suppose someone takes valerian because they already feel unable to sleep. They then become intensely aware of whether the supplement is “working.” Increased attention to bodily sensations can make normal changes in heartbeat much more noticeable, while anxiety about not sleeping can increase sympathetic activity.
That doesn’t mean the sensations aren’t real. It means palpitations do not automatically prove that valerian caused an adrenaline surge.
Other variables matter too: caffeine, nicotine, alcohol, decongestants, medications, other supplements, dehydration, illness and pre-existing rhythm disturbances can all complicate the picture.
What Is Actually Established?
Well-established
Valerian is generally tolerated during short-term use by most adults, but adverse effects occur. The U.S. National Center for Complementary and Integrative Health specifically lists excitability and uneasiness among possible side effects.
Valerenic acid can influence GABA-A receptors, and that interaction depends partly on receptor subtype.
Valerian also isn’t a strongly proven insomnia treatment. A 2024 umbrella review found the overall evidence inadequate to establish efficacy for insomnia, despite some subjective reports of improved sleep quality.
Biologically plausible
Genetic differences could theoretically influence someone’s response to valerian.
Genes affect receptors, enzymes and many aspects of drug metabolism. Experimental research demonstrates that changing GABA-A receptor structure can change the response to valerenic acid.
That makes genetic influence scientifically plausible.
Uncertain
We do not currently have good human evidence identifying particular common gene variants that reliably predict:
valerian → paradoxical excitation → tachycardia or palpitations.
So consumer claims that a particular GABA-related genotype explains someone’s valerian reaction should be treated cautiously.
A genetic test currently cannot reliably tell you, “Valerian will stimulate you rather than sedate you.”
Three Common Mistakes
- Taking more because the first dose didn’t feel sedating. If valerian makes you restless or uncomfortable, escalating the dose is not a sensible experiment.
- Stacking several calming supplements together. Combining valerian with other sedating substances makes both effects and side effects harder to interpret. NCCIH specifically advises against combining valerian with alcohol or sedatives.
- Blaming every palpitation on a genetic reaction. Caffeine, medications, stress and cardiac rhythm problems can produce similar sensations. Genetics should not become an explanation that prevents investigation of a persistent symptom.
A Simpler Evening Approach After a Bad Reaction
If valerian repeatedly makes you more alert rather than sleepy, there is little reason to keep challenging yourself with it simply because it is marketed as a sleep aid.
Stop experimenting that evening rather than adding more supplements to counteract the first one.
Dim bright light, remove unnecessary stimulation, keep the room comfortably cool and use slow, comfortable breathing while allowing the reaction to settle.
On following nights, return to the fundamentals that have stronger sleep-science support: a reasonably consistent wake time, sufficient daytime light, appropriate caffeine timing and a predictable wind-down period.
If palpitations repeatedly occur after valerian, discussing the reaction with a clinician or pharmacist is more useful than trying to identify a speculative “valerian gene.”
What This Doesn’t Mean
A stimulating reaction to valerian does not prove that your GABA system is abnormal.
It doesn’t prove that you have a particular mutation.
And it doesn’t mean that “natural” sleep products are inherently dangerous.
It simply demonstrates an important principle of sleep pharmacology: a substance’s average effect doesn’t guarantee an individual’s response.
Herbal extracts add another layer of uncertainty because their chemical composition can vary, and valerian itself contains multiple potentially active compounds.
Bottom Line
Valerian really can cause excitability or uneasiness in some people, even though it is usually taken for its calming effects.
Valerenic acid interacts with GABA-A receptors, and laboratory research shows that receptor structure influences that interaction. But science has not established specific human gene variants as the cause of valerian-induced paradoxical excitation or heart racing.
If valerian consistently makes you wired, restless or uncomfortable, you don’t need a genetic explanation to justify avoiding it.
And if the “heart racing” is severe, persistent, irregular, associated with chest pain, fainting or breathlessness, treat that as a cardiovascular symptom requiring evaluation—not merely as evidence that a sleep supplement doesn’t agree with your genes.