Ajwain

Ajwain (Trachyspermum ammi) is a plant used in Ayurveda, from the Apiaceae family. Listed in the Ayurvedic Pharmacopoeia of India (API) by the Government of India, Ministry of Health and Family Welfare, Department of AYUSH.

Key facts
Botanical name	Trachyspermum ammi
Family	Apiaceae · other entries in this family
Order	Apiales
Pharmacopoeia status	Listed in the Ayurvedic Pharmacopoeia of India (API) by the Government of India, Ministry of Health and Family Welfare, Department of AYUSH. Thymol (major constituent) recognized by the US EPA as having minimal potential toxicity. Not yet listed in WHO monographs as a standalone entry.
Taxon identifiers	GBIF 3034241 · Wikidata Q413254 · NCBI Taxonomy 52570

This entry and yavani describe the same drug, Trachyspermum ammi, under different names. Both pages are kept because both names are in use; the other is treated as the primary record for citation.

Names and identification

Language	Name
English	Ajwain
Latin/Botanical	Trachyspermum ammi

Key Phytochemical Constituents

Thymol (50-60% of essential oil)
gamma-Terpinene
p-Cymene
Carvacrol
alpha-Pinene and beta-Pinene
alpha-Thujene
Myrcene
1,8-Cineole

How does it work?

Thymol and carvacrol exert antimicrobial action by disrupting bacterial cell membranes and inhibiting efflux pumps
Anti-inflammatory activity mediated through inhibition of COX-2 and pro-inflammatory cytokines (TNF-alpha, IL-6)
Antihypertensive effect via calcium channel blocking and vasodilatory action
Bronchodilatory mechanism through relaxation of tracheal smooth muscle and anticholinergic effects
Antidiabetic action through alpha-glucosidase inhibition and enhanced insulin sensitivity

Which traditional uses are supported by research?

Carminative and anti-flatulence activity - validated through multiple pharmacological studies showing antispasmodic effects on gastrointestinal smooth muscle
Treatment of dyspepsia and digestive disorders - confirmed by modern research demonstrating enhanced digestive enzyme secretion
Bronchodilatory and antitussive use for respiratory conditions - validated by studies showing tracheal smooth muscle relaxation
Antimicrobial use for intestinal parasites and infections - confirmed by in vitro studies against multiple pathogens
Use as analgesic for abdominal and dental pain - supported by antinociceptive studies in animal models

What do recent clinical trials show?

Saraswat N, Sachan N, Chandra P 2021. Acute and Sub-Acute Toxicity Studies and Pharmacodynamic Studies of Standardized Extract of Trachyspermum ammi (L.) Sprague (Fruits) Against Chemically Induced Inflammation in Rats. Current drug discovery technologies. PMID 32957888 · doi:10.2174/1570163817999200918103041
Standardized ajwain extract showed no toxicity in acute and sub-acute studies, while demonstrating significant anti-inflammatory action against chemically induced inflammation in rat models.

3 further claims previously listed here could not be traced to a published paper and have been removed. An absence here means we could not identify the source, not that no work exists.

Recent safety updates

Pregnant women should avoid ajwain due to potential adverse effects on fetal development; use discouraged during breastfeeding
High oral doses can cause fatal poisoning; people on NSAIDs or antiplatelet medications should use cautiously due to ajwain’s inherent anti-clotting activity
Acute and sub-acute toxicity studies (2020) found no significant toxicity at standard therapeutic doses; thymol classified as safe by US-FDA and European Commission as a flavoring agent

What is it made of?

Key Active Markers

Carvacrol
Myrcene
Cineole
Thymol

Analytical Methods: HPLC fingerprinting, TLC (identity), LC-MS/MS (marker quantification)

Dosage forms and preparation

Dosage Forms: Churna (powder), Arka (distillate/hydrosol), Taila (essential oil), Capsule, Tablet, Kashayam (decoction)

Standard Dosage: 1-3g seed powder twice daily; 10-20ml Arka twice daily; 500mg extract capsule; 1-2 drops essential oil in warm water (internal, short-term)

Bioavailability: High bioavailability of thymol (the primary active compound, 35-50% of essential oil). Thymol is rapidly absorbed from the GI tract with peak plasma levels in 1-2 hours. Self-emulsifying property of the volatile oil enhances absorption. The herb itself acts as a bioenhancer for co-administered compounds.

Optimal Timing: After meals with warm water for digestive support; before meals with black salt for appetite stimulation

Standardized Extract: Essential oil standardized to minimum 40% thymol, 15% p-cymene, 10% gamma-terpinene. Seed extract (10:1) standardized to minimum 5% thymol.

Shelf Life: 3 years (whole seeds); 1 year (powder); 2 years (capsules); 3 years (Arka in glass); 4 years (essential oil, properly stored)

Storage: Whole seeds in airtight containers at ambient temperature. Essential oil in amber glass, tightly sealed, at 15-25°C. Powder in nitrogen-flushed sealed packs. Keep away from direct sunlight.

Marker Compounds: Thymol, p-Cymene, Gamma-terpinene, Carvacrol, Beta-pinene, Limonene, Terpinen-4-ol

Extraction Methods

Steam distillation for essential oil (yield 2-5%)
Hydrodistillation (Clevenger apparatus)
Supercritical CO2 extraction
Hydroalcoholic extraction (70:30) for non-volatile constituents
Arka preparation (traditional distillation)

Synergistic Combinations

With Hingu (asafoetida) for carminative action and bloating
With Sunthi for nausea and digestive stimulation
With Saindhava lavana for colic relief
With Ajmoda for enhanced digestive action
With Jeeraka for post-meal digestive comfort

Consult a qualified vaidya before acting on anything here. Ayurvedic practice is prescribed to a person, not to a condition: the same dravya is given, withheld or substituted depending on your constitution, your agni, the season and what else you are already taking. A page cannot know any of that. Self-prescribing from a reference is how the wrong preparation, the wrong dose or the wrong anupana gets used.

Educational reference only. Nothing on this page is medical advice, a diagnosis, or a recommendation to take anything. Traditional uses and research findings are reported as published, not as claims about what any product does. If you take prescribed medication, raise any interaction with the prescriber rather than acting on a page. See our editorial standards.