How does Zataria multiflora work as an antimicrobial?

The primary mechanism of action involves the active compounds carvacrol and thymol. These phenolic monoterpenes disrupt the integrity of bacterial and fungal cell membranes, increasing permeability and leading to cell leakage and death (Evidence Level C). Additionally, the herb's flavonoid content provides antispasmodic effects by relaxing smooth muscles, which supports its traditional use for respiratory and digestive spasms.

Does Zataria multiflora interact with any medications?

There are currently no established severe drug interactions for Zataria multiflora in human clinical trials (Evidence Level D). However, because carvacrol and thymol can influence liver enzyme activity, there is a theoretical risk of interaction with drugs metabolized by the cytochrome P450 system. Patients taking anticoagulants or antidiabetic medication should exercise caution and consult a healthcare provider before use.

What is the standard dosage for Zataria multiflora tea?

The standard adult dosage for Zataria multiflora is 3 to 5 grams of the dried aerial parts, prepared as a tea, taken up to three times daily (Traditional use). If using the essential oil, the typical dose is 3 to 5 drops. It is recommended to start with a lower dose to assess tolerance, particularly for digestive issues.

Is Zataria multiflora safe to use during pregnancy?

Zataria multiflora is likely safe when consumed in amounts commonly found in foods (Evidence Level D). However, medicinal doses and concentrated essential oils are contraindicated during pregnancy due to the potential for uterine stimulation. Women who are pregnant or breastfeeding should avoid therapeutic supplementation and consult a medical professional before use.

What is Zataria multiflora used for in traditional medicine?

In Persian traditional medicine, Zataria multiflora is primarily used for its antimicrobial and antispasmodic properties. It is indicated for treating respiratory infections like bronchitis, digestive disorders such as bloating and cramps, and fungal infections (Evidence Level C). The herb is also applied topically for wound healing and pain relief due to its anti-inflammatory constituents.

Zataria Multiflora (Zataria multiflora)

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Zataria multiflora (Shirazi thyme) is a Lamiaceae plant native to Iran, Pakistan, and Afghanistan used as a condiment and medicinal herb [PMID:23266333, PMID:31531029]. It is recognized for its antioxidant, anti-inflammatory, and immunomodulatory properties [PMID:40011883, PMID:29125648].

Background

Zataria multiflora Boiss., also known as Avishan-e-Shirazi or Shirazi thyme, is a thyme-like plant belonging to the Lamiaceae family that grows wild in Iran, Pakistan, and Afghanistan [PMID:23266333, PMID:32548056].

Traditional uses

Traditional uses include its application as an antiseptic, carminative, stimulant, diaphoretic, diuretic, anesthetic, anti-spasmodic, and analgesic [PMID:23266333]. It is also used in Iranian traditional medicine for the treatment of cough [PMID:29397088].

Active compounds

Main constituents include thymol and carvacrol [PMID:31531029, PMID:35080049]. Other isolated aromatic constituents include multiflotriol, multiflorol, an aromatic ester of p-hydroxy benzoic acid, dihydroxyaromadendrane, luteolin, and alpha-tocopherolquinone [PMID:11140527].

Mechanism of action

The herb exhibits antioxidant, immunomodulatory, and anti-inflammatory effects [PMID:35080049, PMID:29125648]. It may induce apoptosis in human colorectal tumor cell lines [PMID:32548056] and demonstrate relaxant effects in respiratory disorders [PMID:35080049].

Clinical evidence

Evidence BNonalcoholic fatty liver disease (NAFLD) and insulin resistance

Supplementation with 700 mg ZM powder twice daily for 12 weeks significantly reduced serum insulin levels, insulin resistance, and both systolic and diastolic blood pressure compared to placebo [PMID:30477827]

Evidence BUlcerative Colitis (UC)

Extract supplementation (6 mg/kg/day) for two months significantly increased total antioxidant capacity (TAC), superoxide dismutase (SOD), and thiol groups (SH) levels [PMID:40319670]

Evidence BAllergic Rhinitis

A randomized clinical trial indicated that ZM extract can alleviate symptoms of allergic rhinitis [PMID:34377137]

Evidence BPremenstrual Syndrome (PMS)

A double-blinded prospective randomized trial investigated the use of 20 mg ZM essence pearls (four pearls daily) to control PMS symptoms [PMID:25414880]

Evidence ACandida species infections

A systematic review of 33 articles concluded that Z. multiflora is effective in reducing or inhibiting the growth of Candida species [PMID:36423242]

Evidence C

Evidence summary

Evidence ranges from high-level systematic reviews for antifungal activity (A) and respiratory symptoms (A) to randomized controlled trials (B) for NAFLD, ulcerative colitis, and allergic rhinitis. Much of the pharmacological data is based on reviews (C) or in vitro/animal models (D).

PubMed sources

1.PMID: 27000311 (2016) — Dietary supplements for dysmenorrhoea. · The Cochrane database of systematic reviews
2.PMID: 23266333 (2013) — Zataria multiflora Boiss. (Shirazi thyme)--an ancient condiment with modern pharmaceutical uses. · Journal of ethnopharmacology
3.PMID: 36712202 (2023) — The effects of Shirazi thyme (Zataria multiflora) oil nanoemulsion on the quality of shrimp (Litopenaeus vannamei) during refrigerated storage. · Journal of food science and technology
4.PMID: 34377137 (2021) — Shirazi thyme (Zataria multiflora) extract can alleviate allergic rhinitis: a randomized clinical trial. · Postepy dermatologii i alergologii
5.PMID: 38873443 (2024)

Zataria Multiflora

Sources & Citations