Lavender Tea Side Effects: What to Know

DetoxWater Editorial Team•Published November 5, 2026

Possible lavender tea side effects include digestive upset, drowsiness and allergic reactions, although their frequency is unknown.

What are 3 possible lavender tea side effects?

Digestive upset, drowsiness and allergic reactions are three possible side effects of lavender tea. The ai detox recipe generator can suggest drink ideas, but it cannot determine whether lavender tea is safe for you.

These effects are not a proven frequency ranking: there are not enough lavender tea-specific data to establish which is most common. A reaction could also be caused by another ingredient in a blend, so check the full product label.

Digestive upset

Nausea or stomach discomfort may occur after an herbal drink. A sensitive digestive tract could react to plant constituents or another ingredient in a blend, but the mechanism and frequency of digestive symptoms from lavender tea have not been established.

If you feel unwell after drinking lavender tea, stop using it rather than drinking more to see whether the feeling passes. Check the package for other ingredients and keep it available if you need to discuss the reaction with a clinician or pharmacist.

Evidence for this effect is limited, particularly for tea brewed from lavender flowers. Research on other lavender preparations cannot tell you the likelihood of digestive symptoms from a cup of lavender tea.

Get medical advice if stomach discomfort is severe, persists or keeps returning. A symptom after a drink does not necessarily mean the drink caused it, and a clinician can consider other possible explanations.

Can lavender tea make you drowsy?

Drowsiness

Drowsiness is a possible concern because lavender preparations have been studied for calming effects. This does not prove that lavender tea will make you sleepy, and there is not enough tea-specific evidence to predict how strongly an individual might respond.

Be especially cautious if you take medicines that can cause drowsiness, such as sleeping pills, benzodiazepines, opioid pain medicines or some antihistamines. An added sedating effect is a precautionary concern, not a well-established interaction specific to lavender tea. Ask a clinician or pharmacist about your particular medicines before using it.

If you notice sleepiness after drinking lavender tea, stop using it and avoid driving or doing other activities that require alertness. Do not change or stop a prescribed medicine on your own. Severe sleepiness, confusion or difficulty waking someone needs urgent medical attention.

Alcohol and other products that cause drowsiness can also impair alertness. Tell your healthcare professional about them when asking whether lavender tea is appropriate for you.

Can lavender tea cause an allergic reaction?

Allergic reaction

An allergic reaction occurs when the immune system responds to a substance it recognizes as a trigger. It is possible to react to lavender or another ingredient in a blend, but the risk from drinking lavender tea has not been well measured. A rash or stomach symptom after drinking it does not, by itself, establish that lavender was the cause.

Possible signs of an allergic reaction include itching, hives or swelling. Stop drinking lavender tea if you suspect a reaction, and do not deliberately try it again to test yourself. A clinician can help assess what happened and whether an allergy evaluation is appropriate.

Check the ingredient list if the product contains more than lavender. Keeping the packaging can help a clinician identify potential triggers, but the label alone cannot confirm which ingredient caused a reaction.

Swelling of the tongue or throat, trouble breathing, fainting or rapidly worsening symptoms can signal a serious reaction. Call emergency services immediately if these occur; do not wait to see whether they improve.

Is lavender tea safe?

Lavender tea made from edible lavender flowers may be tolerated by many adults, but research on the safety of the brewed drink is limited. A product’s other ingredients, your health conditions and the medicines you take can also affect whether it is suitable for you.

A 2019 systematic review and meta-analysis of lavender for anxiety examined lavender in different forms and administered by different routes. Its findings cannot establish how often side effects occur with lavender tea. A 2022 review of medicinal plants also discussed lavender and noted that more research is needed to support safe use.

Brewed lavender flowers are not the same as concentrated lavender essential oil. Do not add essential oil to lavender tea or swallow it as a substitute for the flowers. Use flowers intended for food rather than ornamental lavender that may have been treated with chemicals.

A product being sold as an herbal tea does not guarantee that everyone can use it safely. If you have concerns about an ingredient or a past reaction, ask a clinician or pharmacist before drinking it.

Who should avoid lavender tea or ask a clinician first?

Avoid lavender tea if you know you are allergic to lavender or another ingredient in the product. If you previously reacted to a lavender-containing product but do not know which ingredient caused it, ask a clinician before trying lavender tea.

During pregnancy or breastfeeding, ask a healthcare professional before using lavender tea. Safety information for these groups is insufficient; that uncertainty is not proof that a normal serving has caused harm. Avoid concentrated lavender products unless your healthcare professional specifically advises otherwise.

Check with a child’s pediatric clinician before giving lavender tea to a child, particularly as a regular herbal product. Keep lavender essential oil out of children’s reach: swallowing concentrated oil is a different and potentially more dangerous exposure than drinking brewed flowers.

If you take sedating medicines, have a condition that affects alertness or have a procedure involving anesthesia planned, discuss lavender products with your healthcare team. Tell them about all herbal products you use, not just prescription medicines. Continue prescribed treatment unless the prescribing clinician tells you otherwise.

A pharmacist can help you review a tea’s ingredient list alongside your medicines. If the blend contains several herbs, safety information about lavender alone will not necessarily cover the whole product.

How much lavender tea is safe to drink daily?

There is no established safe daily amount for lavender tea that applies to everyone. Available research does not provide a reliable maximum intake for the brewed drink, and a serving that one person tolerates may not suit someone else.

If a clinician agrees that lavender tea is appropriate for you, use a modest serving of a product intended for drinking and follow the package directions. Avoid making it unusually concentrated or assuming that more is better. Stop if you notice a possible adverse effect.

The amount of lavender compounds in a cup can vary with the product and preparation. Package directions are not a guarantee of safety for children, pregnant people or people taking medicines, so those groups should seek individual advice rather than relying on a label alone.

Not noticing a reaction immediately does not establish a safe daily limit. If you intend to drink lavender tea regularly and have a health condition or take medicines, discuss that use with your healthcare professional.

When should you see a doctor after drinking lavender tea?

Seek emergency help for trouble breathing, swelling of the tongue or throat, fainting, a seizure, severe confusion or difficulty waking someone. These symptoms should not be managed by waiting for the tea to wear off.

If someone has swallowed lavender essential oil, contact a poison control center immediately for advice, especially if a child is involved. Do not induce vomiting. If the person has severe symptoms or is unconscious, call emergency services.

Contact a clinician for symptoms that persist, worsen or recur after lavender tea, or for an unexplained rash or hives. When you call, describe the symptoms, when they began, the product used and any medicines or other ingredients involved.

Bring or photograph the package if possible. This can help the clinician assess the exposure without assuming lavender was responsible, especially when the tea contains a blend of ingredients.

Frequently asked questions

Does lavender tea contain caffeine?

Plain tea made only from lavender flowers does not naturally contain caffeine. A lavender blend may contain caffeine if it also includes tea leaves or another caffeinated ingredient, so check the label.

Does the scent or color of lavender tea show how safe it is?

No. Scent and color do not reliably show the amount of lavender compounds in a cup or predict whether you will have a reaction.

Can lavender tea replace a prescribed sleep medicine?

No. Lavender tea has not been established as a replacement for prescribed treatment. Talk with your clinician before making any change to a sleep medicine.

Sources

  1. Medicinal Plants Used for Anxiety, Depression, or Stress Treatment: An Update. Molecules (Basel, Switzerland) (2022). PubMed 36144755
  2. Effects of lavender on anxiety: A systematic review and meta-analysis. Phytomedicine : international journal of phytotherapy and phytopharmacology (2019). PubMed 31655395