Valerian

Roots of the Sleep Herb: Different Sleep Stories Under One Name

If you take valerian on a night when it is hard to fall asleep, will you fall asleep immediately like a sleeping pill? In short, there is insufficient evidence for such expectations.

Valerian is a root plant that has been widely used for sleep for a long time, but taking it as a capsule or tea does not mean that immediate sedation or a curative effect for chronic insomnia on that same night has been confirmed. Rather, because various formulations are mixed under the single name 'Valerian,' the more important issue is which one to use, how much, and based on what criteria.

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Why Consider Valerian on Nights When It Is Hard to Fall Asleep?

Valerian refers to the roots and rhizomes of a plant in the Caprifoliaceae family, Valeriana officinalisand it is also known as garden valerian. While it has a long history as a sleep herb, this text only covers reviewed modern evidence. The NCCIH states that research results on valerian for sleep are inconsistent and there is insufficient evidence to determine if it is useful for treating chronic insomnia. An umbrella review of 8 systematic reviews in 2024 also showed a possibility of improving subjective sleep quality, but failed to confirm insomnia treatment efficacy in objective and quantitative indicators. In other words, while the feeling of 'becoming sleepy' may appear in some people, there is still a lack of common evidence that it objectively improves sleep quality.

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From Root to Capsule: Same Name, Different Formulations

Under the single name Valerian, there exist teas, tinctures, powders, water extracts, specific ethanol dry extracts, and valerian-hop combinations. Their component compositions and evidence differ. Teas, tinctures, and powders are closer to the context of traditional use, while specific ethanol dry extracts are medicinal preparations recognized by the EMA under different criteria. Therefore, the research results of one formulation cannot be applied directly to judge products in other forms. For example, expecting the effect of brewing tea based on research on a specific extract in a capsule, or conversely applying the experience of tea to an extract, is crossing the boundary of evidence.

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The Boundary Between EMA-Recognized and General Products

The EMA recognizes the established medicinal use of specific dry ethanol root extracts for mild nervous tension and sleep disorders. However, it classifies various other formulations as traditional use based on long-term experience. The important point here is that being an EMA medicinal preparation does not mean it is for immediate symptom relief. It is explained that it may take 2 to 4 weeks for optimal effect, meaning it is not an ingredient that makes you fall asleep immediately after a single dose that night. Furthermore, the EMA's medicinal context and the quality and labeling of general foods or supplements are not the same system. Just because the same ingredient name is written on the label does not mean they have the same extract, the same standards, or the same evidence.

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Valerian-Hop Combination: Whose Effect Is It?

There are many combination products on the market containing both valerian and hops. However, since the results for valerian-hop combinations evaluate the two ingredients together, they cannot be separated as the effect of valerian alone. If you conclude that 'valerian is effective' after seeing research on a combination product, you ignore the role of hops or the interaction between the two ingredients. This point must be checked first when comparing single-ingredient products and combination products.

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Between Subjective Sleep Feeling and Objective Sleep Indicators

The 2024 umbrella review concluded that while signals of subjective sleep quality were shown, the efficacy for treating insomnia was not proven in objective and quantitative indicators. What does this difference mean? The feeling of 'seeming to sleep well' is not the same as measurable changes such as actual sleep architecture, duration, and number of awakenings. When judging valerian, it is necessary to develop a habit of distinguishing between 'feeling' and 'measured results.' Regarding valerian, there is a possibility of improving the feeling, but objective evidence that it treats the disease of insomnia has not yet been secured.

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Precautions When Using with Other Medications

Particular caution is needed when using valerian with prescription medications or supplements. It should not be overlapped arbitrarily with alcohol, sleeping pills, or sedatives, and if drowsiness occurs, one should not drive or operate machinery. Since withdrawal-like symptoms may rarely occur if use is suddenly stopped after long-term daily use, you should consult a healthcare provider. Safety information is insufficient for pregnancy, lactation, and children under 12. If symptoms persist for more than 2 weeks, worsen, or if there is severe daytime drowsiness or respiratory abnormalities, prompt medical evaluation takes priority over selecting an ingredient.

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How to Check Individual Circumstances and Safety Signals

When considering valerian, safety information must be viewed as much as the expectations. Reported adverse reactions include headache, gastrointestinal discomfort, mental clouding, anxiety, agitation, and vivid dreams, and long-term safety is not sufficiently known. So, what should be checked? First, distinguish whether the symptoms are temporary difficulty falling asleep or subjects for evaluation such as insomnia lasting over 2 weeks, snoring, apnea, depression, or restless legs. Next, check if sleeping pills, sedatives, antihistamines, or alcohol are being used together, and if there is driving or machinery operation the next day. If adverse reactions appear or symptoms persist, receiving a medical evaluation takes priority over continuing use.

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Realistic criteria to check today

If you are considering valerian, it is advisable to first check three things. First, whether it is a tea, powder, tincture, single extract, or a valerian-hop complex, as well as the extraction method and daily dosage. Second, whether you are experiencing temporary difficulty falling asleep or if you require a professional evaluation for conditions such as insomnia, snoring, sleep apnea, depression, or restless legs syndrome lasting more than 2 weeks. Third, whether you are using sleeping pills, sedatives, antihistamines, or alcohol concurrently, and if you need to drive or operate machinery the following day. Rather than relying on the nickname 'sleep herb,' the realistic standard for using this ingredient is to verify the exact formulation, complex components, duration of symptoms, and next-day drowsiness, and not to delay an evaluation for chronic insomnia or sleep apnea.

References

1. NCCIH: Valerian.
2. EMA: Valerianae radix herbal medicinal product.
3. Does valerian work for insomnia? Umbrella review.

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This text explains the origin of the raw materials, the scope of research, and precautions before consumption. As this cannot replace individual diagnosis or treatment, please consult a medical professional if you are taking medication or if symptoms persist. If sudden and severe symptoms such as difficulty breathing or decreased consciousness occur after consumption, seek help from 119 or the emergency room.