Thyme Oil
Thymus vulgaris
T Traditional useTraditionally used as an expectorant for cough with a cold, rubbed on the chest or added to a bath. Use only ready-made products with a set dose.
Image: Herbadex Botanik Stüdyosu · Özel Üretim
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At a glance
The EMA assesses thyme oil from Thymus vulgaris and T. zygis as a traditional herbal product for two uses: by mouth as an expectorant for cough with a cold, and rubbed on the chest or used in a bath for cough and cold symptoms. In Turkey, oil sold as "kekik yağı" is often oregano (Origanum) oil, which this assessment does not cover.
Updated: October 15, 2026
✓ This herb record is backed by official European Medicines Agency (EMA HMPC) herbal monographs.
What is it used for?
T Traditional use
Traditional use: Based on at least 30 years of documented traditional use rather than clinical trials.
How do we rate evidence levels? →Traditionally used as an expectorant for cough associated with a cold. [1]
T Traditional use
Traditional use: Based on at least 30 years of documented traditional use rather than clinical trials.
How do we rate evidence levels? →Traditionally rubbed on the chest or used as a bath additive for symptoms of coughs and colds. [1]
How is it used?
Oral oil
Only as a dosed ready-made product: 0.2–0.25 ml of oil per dose. Max 1.25 ml a day.
Amount: 3–5 times daily
Duration limit: 1 week
[1]Topical
Rub a cream or ointment with up to 10% oil on the chest and back.
Amount: Up to 3 times daily
Duration limit: 1 week
[1]Topical
Bath additive: 0.007–0.025 g of oil per litre; bath at 35–38 °C for 10–20 minutes.
Amount: Daily or every other day
Duration limit: 1 week
[1]Safety & interactions
Minimum age: 18 years
- Do not apply to the face, especially around the nose, of babies under 2: risk of throat spasm.
- Oral and skin use not recommended under 18; bath use not recommended under 3.
- No full hot baths with open wounds, acute skin disease, high fever, severe infection, serious circulation problems or heart failure; take care with high blood pressure.
- See a doctor if shortness of breath, fever or pus-like phlegm occurs, or if symptoms last over 1 week.
- Do not swallow undiluted essential oil; keep out of reach of children.
- Not recommended in pregnancy or breastfeeding because safety has not been shown.
Drug interactions
No recorded interactions
Side effects
- Allergic reactions
- Skin irritation when applied to the skin
⚕ When to see a doctor
- If high fever, shortness of breath or purulent/bloody phlegm develops
- If symptoms do not improve within 1–2 weeks or worsen
- If severe abdominal pain, jaundice, rash or allergic reaction occurs
Did you know?
Thyme oil baths can be used from age 3 with reduced doses; oral use is for over-18s only. [1]
Frequently asked questions
Can thyme oil be swallowed?
Not as such. The EMA assesses oral use only for dosed ready-made products and over 18.
Is the "kekik yağı" sold in Turkey this oil?
Often not. It is usually oregano (Origanum) oil; this assessment covers Thymus vulgaris and T. zygis oil.
Can children use thyme oil?
As a bath additive from age 3 with an age-appropriate dose; never on the face of children under 2.
Sources
- European Union herbal monograph on Thymus vulgaris L. and Thymus zygis L., aetheroleum – Revision 1EMA HMPC · 2020
Cite This Page
Thyme Oil (Thymus vulgaris). Herbadex — Doğal Şifa Rehberi (2026). https://herbadex.com/en/herb/thyme-oil/
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