Thyme is a common kitchen herb with one of the strongest evidence profiles of any herbal cough remedy. Its active volatile oil thymol has antispasmodic and antimicrobial properties and is already used as an active ingredient in commercial antiseptic products. A 2006 RCT found a thyme-based syrup equivalent to a pharmaceutical expectorant for acute bronchitis. At tea and culinary amounts it is very safe.
Ingredient Data
| Catalog No. | 027 |
|---|---|
| Type | Herb |
| Source | Aerial parts of Thymus vulgaris (garden thyme) |
| Common forms | Fresh sprigs, dried herb, honey syrup, essential oil (topical only) |
| Key compounds | Thymol (20–55% of essential oil), carvacrol, rosmarinic acid, flavonoids |
| Best for | Cough relief, acute bronchitis comfort, respiratory support |
Remedy Stats
Subjective ratings use a transparent rubric; Evidence is a hard, sourced fact. How we score →
Works For
| Use | Strength | What the evidence says |
|---|---|---|
| Acute cough / bronchitis | ●●●●○ | Kemmerich 2006 RCT: thyme-ivy syrup non-inferior to ambroxol expectorant for acute bronchitis; Kemmerich 2007 confirmed in larger trial |
| Antimicrobial | ●●●○○ | Thymol inhibits a broad range of bacteria and fungi in lab studies; used as active in antiseptic mouthwashes and vapor rubs |
| Antispasmodic (cough suppression) | ●●●○○ | Thymol and carvacrol relax bronchial smooth muscle in vitro, which may partly explain the cough-calming effect |
| Sore throat comfort | ●●○○○ | Traditional use; thymol active in OTC antiseptic gargles; no dedicated sore-throat clinical trials |
Forms & Preparations
| Fresh thyme | Add 3–5 sprigs to hot water and steep, covered, for 10 min; mild, pleasant flavor |
|---|---|
| Dried thyme | Easier to measure; use 1 tsp per cup; very similar efficacy to fresh |
| Thyme-honey syrup | Simmer thyme in water, strain, combine with honey; traditional European cough preparation |
| Thyme essential oil | Topical / aromatherapy only — never ingest; thymol is toxic at high oral concentrations |
About Thyme
Garden thyme (Thymus vulgaris) has been used since antiquity for respiratory complaints. Its high concentration of thymol — the compound responsible for its sharp, medicinal scent — has documented antispasmodic effects on airway smooth muscle, helping to calm the bronchospasm that triggers coughing. Thymol also has broad antimicrobial activity, which is why it appears as an active ingredient in products like Listerine mouthwash and traditional chest rub formulas.
The Kemmerich (2006) trial is the strongest piece of clinical evidence for thyme as a cough remedy: a controlled study in 361 patients with acute bronchitis found a thyme-ivy liquid preparation produced non-inferior cough relief compared to ambroxol, a commonly prescribed mucolytic expectorant. A follow-up study in 2007 confirmed these results in a larger cohort with good tolerability. ESCOP (European Scientific Cooperative on Phytotherapy) recognizes thyme preparations for symptomatic treatment of bronchitis and upper respiratory tract infections.
At culinary amounts (tea, syrup), thyme is considered very safe. The essential oil is a different matter: concentrated thymol is toxic if ingested in quantity, and topical thyme essential oil should always be diluted.
Sources
- Kemmerich B, Eberhardt R, Stammer H. Efficacy and safety of a combination herbal medicinal product containing Dry extract of Ivy leaves and Thyme herb in children and adults suffering from acute coughs. Arzneimittelforschung. 2006;56(9):652–660.
- Kemmerich B. Evaluation of efficacy and tolerability of a fixed combination of dry extract of ivy leaves and thyme herb in adults suffering from acute bronchial spasms. Arzneimittelforschung. 2007;57(9):607–615.
- Gruenwald J, Graubaum HJ, Busch R. Efficacy and tolerability of a fixed combination expectorant in patients with upper respiratory tract infections. Arzneimittelforschung. 2005;55(11):669–676.
- European Scientific Cooperative on Phytotherapy (ESCOP). Thymi herba (Thyme). Monograph on therapeutic use.
- NIH National Center for Complementary and Integrative Health. Thyme. General herb profile.
This page is for informational purposes only and is not a substitute for professional medical advice. Always consult a qualified healthcare provider, especially for persistent or severe cough.