Hyssop Herb (Hyssopus officinalis): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does hyssop work as an expectorant?

Hyssop contains volatile oils including pinocamphone, isopinocamphone, and terpineol, along with rosmarinic acid, which provide its expectorant action. These compounds help loosen and expel mucus from the respiratory tract by stimulating bronchial secretions and reducing airway inflammation. The herb also exhibits mild antispasmodic effects on bronchial smooth muscle. Rosmarinic acid contributes additional anti-inflammatory and antioxidant properties. Evidence level: C (based on pharmacological studies and traditional use rather than clinical trials).

Does hyssop interact with any medications?

Hyssop has limited documented drug interactions, but caution is warranted. Due to its convulsant properties, hyssop may reduce the effectiveness of anticonvulsant medications like phenytoin or carbamazepine. Theoretically, hyssop could interact with sedatives and CNS depressants, though clinical evidence is lacking. Patients with epilepsy taking antiepileptic drugs should avoid hyssop entirely. Always consult a qualified healthcare provider before combining hyssop with prescription medications. Evidence level: C (based on pharmacological properties).

What is the recommended dosage for hyssop tea?

The standard adult dosage for hyssop is 2-4 grams of dried herb prepared as tea, taken up to three times daily. To prepare, steep the dried herb in boiling water for 10-15 minutes. Alternatively, 2ml of tincture three times daily is commonly used. Do not exceed these recommended doses, as higher amounts may cause gastrointestinal upset and potentially seizures due to the pinocamphone content. Evidence level: C (traditional use recommendations).

Is hyssop safe to take during pregnancy?

Hyssop is considered unsafe during pregnancy and should be strictly avoided. The herb contains pinocamphone, which has uterine stimulant properties that may trigger miscarriage or premature labor. The essential oil poses additional risks due to its convulsant effects. Pregnant and breastfeeding women should not use hyssop in any form, including teas, tinctures, or essential oils. Evidence level: C (based on pharmacological properties and traditional contraindications).

What are the medicinal uses of hyssop herb?

Hyssop has been used traditionally for respiratory conditions including coughs, colds, bronchitis, and asthma, functioning as an expectorant to help clear mucus from the airways. It also serves as a digestive bitter tonic to stimulate appetite and relieve mild indigestion. Externally, hyssop preparations have been applied as antiseptics for minor wounds and skin irritations. The herb has historical significance in biblical purification rituals. Evidence level: C (traditional use with limited clinical validation).

Can hyssop cause seizures or convulsions?

Yes, hyssop can cause seizures, particularly at high doses or when the essential oil is consumed undiluted. The compound pinocamphone is a known convulsant that affects the central nervous system. Individuals with epilepsy should avoid hyssop entirely. Even in healthy individuals, exceeding recommended doses of 2-4g dried herb or using concentrated essential oil internally poses significant seizure risk. Topical application of properly diluted essential oil is generally safer. Evidence level: C (case reports and pharmacological data).

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 29 articles PubMed · modèle : gemma4:31b

Résumé

Hyssopus officinalis is an aromatic medicinal herb used traditionally for respiratory and gastrointestinal ailments [PMID:31643710, PMID:36503515].

Contexte

Hyssop is a perennial subshrub of the Lamiaceae family distributed from the eastern Mediterranean region to central Asia [PMID:31643710, PMID:34746475]. It is an aromatic plant containing essential oils and is used as a spice, ornamental plant, and in various cosmetic and food applications [PMID:41681651].

Usages traditionnels

It is used for the alleviation of symptoms associated with the common cold, respiratory tract infections, gastrointestinal infections, loss of appetite, fungal infections, and spasmodic conditions [PMID:31643710, PMID:35069979]. It has also been used in traditional medicine to treat seizures [PMID:36287300].

Composés actifs

The herb is rich in phenolic compounds, flavonoids (including luteolin, quercetin, apigenin, and diosmin), and rosmarinic and chlorogenic acids [PMID:35069979, PMID:34746475, PMID:35358622]. Its essential oil contains oxygenated terpene compounds, primarily monoterpene ketones such as cis-pinocamphone and isopinocamphone, as well as beta-pinene and eucalyptol [PMID:41681651, PMID:35069979, PMID:39367824].

Mécanisme d'action

Hyssop extracts have demonstrated the ability to inhibit alpha-glucosidase activity, thereby reducing intestinal carbohydrate absorption and postprandial hyperglycemia [PMID:14703310, PMID:14697274]. Methanol extracts have shown inhibitory activity against the COX-2 enzyme [PMID:35358622]. Additionally, crude extracts have shown anti-HIV activity by inhibiting reverse transcriptase (RT), syncytia formation, and p17/p24 antigen expression [PMID:1708226].

Preuves cliniques

Preuve BMild to Moderate Asthma

Patients with productive cough receiving hyssop syrup (5 ml twice daily) showed significant improvement in FEV1, Asthma Control Test (ACT) scores, and peak expiratory flow (PEF) over 4 weeks [PMID:39959798]

Sécurité et effets indésirables

Hyssop has not been implicated in causing liver injury [PMID:31643710]. However, commercial hyssop essential oils have been reported to cause human intoxication characterized by tonic-clonic convulsions [PMID:7333081]. Experimental data in rats indicate that hyssop oil can induce electrocortical clonic seizures and may have cumulative toxic effects with repeated subclinical doses [PMID:7333081].

Synthèse des preuves

Evidence consists primarily of in vitro studies, animal models (rats, fish), and one randomized clinical trial for asthma. While traditional use is widespread, safety concerns exist specifically regarding the concentrated essential oil.

Sources PubMed

1.PMID: 31643710 (2012) — The Genus Hyssopus: Traditional Use, Phytochemicals and Pharmacological Properties. · Plants (Basel, Switzerland)
2.PMID: 39959798 (2024) — Effect of Hyssop (Hyssopus officinalis) Syrup on Mild to Moderate Asthma: A Randomized Double-Blind Placebo-Controlled Trial. · Tanaffos
3.PMID: 36503515 (2022) — The impact of Hyssop (Hyssopus officinalis) extract on activation of endosomal toll like receptors and their downstream signaling pathways. · BMC research notes
4.PMID: 35617511 (2023) — Chemical compositions, yield and antioxidant activity of the essential oil of hyssop (Hyssopus officinalis L.) under intercropping with fenugreek (Trigonella foenum-graecum L.). · Natural product research
5.PMID: 41681651 (2026) — Ontogenetic and Environmental Variability of Hyssop (Hyssopus officinalis L.) Essential Oil Composition and Activity.

Hyssop Herb

Sources et citations

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