Plant Comparison
Hyssop vs Sweet Violet
A side-by-side comparison of two medicinal plants — every documented constituent, action, use, safety note and cited source, assembled automatically from the Omnia Sana database.
At a glance
Hyssop and Sweet Violet: they share 7 indicated uses (arthritis / joint pain, bronchitis, cancer (anticancer research), …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Hyssop | Sweet Violet | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 1/10 | Comparable evidence |
| Bronchitis | 2/10 | 5/10 | Stronger for Sweet Violet |
| Cancer (anticancer research) | 2/10 | 2/10 | Comparable evidence |
| Cough | 2/10 | 5/10 | Stronger for Sweet Violet |
| Inflammation (general) | 2/10 | 1/10 | Comparable evidence |
| Respiratory support | 2/10 | 6/10 | Stronger for Sweet Violet |
| Skin irritation | 1/10 | 5/10 | Stronger for Sweet Violet |
Evidence scores (1–10) are computed from the tier of each cited source. “Comparable” means the two scores are within one point. Follow a score to its detailed sources.
Key Constituents
Volatile oil containing the ketones pinocamphone and isopinocamphone, giving the characteristic aroma but also responsible for the neurotoxic/convulsant risk of the essential oil at high internal doses.
Antioxidant constituents contributing to the plant's antimicrobial and anti-inflammatory activity.
Pharmacological Actions
Demulcent / expectorant for cough, bronchitis and catarrh (mucilage soothes; saponins loosen mucus) - a double-blind RCT found violet-flower syrup, added to standard treatment, sped cough suppression in children with asthma
Demulcent / expectorant for cough, bronchitis and catarrh (mucilage soothes; saponins loosen mucus) - a double-blind RCT found violet-flower syrup, added to standard treatment, sped cough suppression in children with asthma
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from anticancer action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
Demulcent / expectorant for cough, bronchitis and catarrh (mucilage soothes; saponins loosen mucus) - a double-blind RCT found violet-flower syrup, added to standard treatment, sped cough suppression in children with asthma
Demulcent / expectorant for cough, bronchitis and catarrh (mucilage soothes; saponins loosen mucus) - a double-blind RCT found violet-flower syrup, added to standard treatment, sped cough suppression in children with asthma
inferred from anticancer action
Demulcent / expectorant for cough, bronchitis and catarrh (mucilage soothes; saponins loosen mucus) - a double-blind RCT found violet-flower syrup, added to standard treatment, sped cough suppression in children with asthma
Mild sedative for sleeplessness and to ease headache (traditional)
inferred from anti-inflammatory action
Mild sedative for sleeplessness and to ease headache (traditional)
inferred from expectorant action
inferred from demulcent action
Safety, Cautions & Contraindications
Generally safe at therapeutic doses. Hyssop essential oil is neurotoxic in high doses (contains pinocamphone and isopinocamphone) — internal use of the essential oil is contraindicated, especially in epilepsy, pregnancy, and children. The herb (dried or fresh) at normal tea doses does not carry this risk. Not recommended internally in medicinal doses during pregnancy.
Duke (2002) rates hyssop as ++ and notes clinical evidence (score 2) for antiviral activity, particularly against herpes simplex virus, which is notable clinical validation for this herb. It also demonstrates experimental antibacterial, antispasmodic, and expectorant activities. Duke warns that hyssop essential oil is potentially convulsant at higher doses (due to pinocamphone content) and should not be used in epilepsy or by children. Dose: 2–3 g dried herb as tea three times daily; no more than 0.3 ml of essential oil internally. Avoid in pregnancy due to emmenagogue properties (Duke, 2002).
Generally well tolerated as flower/leaf preparations. It contains salicylates, so use caution if you are salicylate-sensitive; the root in large doses is emetic and purgative.
Safety in pregnancy and breastfeeding is not established, so avoid medicinal doses.
External Ids
Botanical Description
Aromatic, semi-woody perennial subshrub with slender, upright, square stems typical of the mint family. The leaves are narrow, lance-shaped and highly aromatic. Small, two-lipped, violet-blue (occasionally pink or white) flowers are borne in dense whorled spikes along the upper stem.[1]
Low, spreading perennial herb with heart-shaped, softly toothed leaves arising from a short rootstock, spreading by runners (stolons). Fragrant, deep violet-purple (occasionally white) flowers with five petals, the lower petal spurred, are borne singly on slender stalks.[11]
Habitat
Grows on dry, sunny, rocky or calcareous slopes and banks; native to southern Europe, the Mediterranean region and Central Asia, and widely cultivated as a culinary and medicinal herb.[1]
Grows in woodland edges, hedgerows, shaded banks and gardens on moist, humus-rich soils; native to Europe, North Africa and Asia and widely naturalised and cultivated elsewhere.[11]
Harvesting
The flowering aerial parts (leaf, stem and flower) are cut in summer as the plant comes into flower, when essential oil content is highest, and dried in a warm, shaded, airy place.[1]
Flowers are picked as they open in early spring; leaves can be gathered through the growing season and dried.[11]
Traditional Uses
Hyssop has an ancient Mediterranean and biblical reputation as a cleansing, aromatic herb, traditionally used as an expectorant and antimicrobial remedy for coughs, bronchitis and respiratory catarrh, and as a digestive bitter and mild antiviral herb, notably for cold sores (herpes simplex).[1]
Sweet violet flower and leaf have a long European folk history as a soothing demulcent and expectorant remedy for cough, bronchitis and catarrh, and as a mild sedative for sleeplessness and headache; the flower syrup in particular has a long tradition as a children's cough remedy.[11]
Preparations
Dried flowering herb infused in hot water as a traditional expectorant and digestive tea.
Dosage
Health Canada's NNHPD monograph gives 3-16 g of dried herb top per day for adults 18 years and older, not to exceed 4 g in a single dose, with infusion among the accepted methods of preparation. Educational reference only, not a prescription. The essential oil is not for unsupervised internal use.
A double-blind randomised placebo-controlled trial used 5 mL of Viola odorata syrup every 12 hours for 4 weeks as add-on therapy for insomnia. Traditional references suggest around 2-4 g of dried flower and leaf per cup, up to three times daily. Note the EU monograph on Violae herba cum flore covers Viola tricolor, a different species, and its posology does not transfer here. Educational reference only, not a prescription.
References
Lookalikes Review
Drug Class Interactions
Not documented
Dangerous Lookalikes
Not documented
References & Sources
- Atazhanova, G., Ishmuratova, M., Levaya, Y., Smagulov, M. and Lakomkina, Y (2024) 'The Genus Hyssopus: Traditional Use, Phytochemicals and Pharmacological Properties', Plants (Basel), 13(12), pp. 1683. doi:10.3390/plants13121683 Traditional / reference
https://doi.org/10.3390/plants13121683 - Sharifi-Rad, J., Quispe, C., Kumar, M., Akram, M. et al (2022) 'Hyssopus Essential Oil: An Update of Its Phytochemistry, Biological Activities, and Safety Profile', Oxidative Medicine and Cellular Longevity, 2022, pp. 8442734. doi:10.1155/2022/8442734 Traditional / reference
https://doi.org/10.1155/2022/8442734 - Gharakhani-Beni, A., Ghasemi Pirbalouti, A., Javanmard, H., Soleymani, A. and Golparvar, A (2022) 'Chemical compositions, yield and antioxidant activity of the essential oil of hyssop (Hyssopus officinalis L.) under intercropping with fenugreek', Natural Product Research, 37(4), pp. 675-680. doi:10.1080/14786419.2022.2078971 Preclinical
https://doi.org/10.1080/14786419.2022.2078971 - Fatahinezhad, N., Lorigooini, Z., Arabi, M., Rabiei, Z., Sheykhshabani, S.K. and Rafieian-Kopaei, M (2022) 'Effects of Hyssopus Officinalis Hydroalcoholic Extract on Pentylenetetrazol-Induced Convulsive Seizures in Rat', Neurochemical Research, 47(12), pp. 3792-3804. doi:10.1007/s11064-022-03759-x Preclinical
https://doi.org/10.1007/s11064-022-03759-x - Tahir, M., Rahman, M.A. and Khushtar, M (2019) 'Gastroprotective effect of Hyssopus officinalis L. leaves via reduction of oxidative stress in indomethacin-induced gastric ulcer in experimental rats', Drug and Chemical Toxicology, 45(1), pp. 291-300. doi:10.1080/01480545.2019.1685537 Preclinical
https://doi.org/10.1080/01480545.2019.1685537 - Khaksar, S., Kiarostami, K. and Alinaghi, S (2022) 'The Effects of Methanol Extracts of Hyssopus officinalis on Model of Induced Glioblastoma Multiforme (GBM) in Rats', Journal of Molecular Neuroscience, 72(9), pp. 2045-2066. doi:10.1007/s12031-022-02058-y Preclinical
https://doi.org/10.1007/s12031-022-02058-y - Ghasempour, M., Hosseini, M., Soltani-Zangbar, M.S., Motavalli, R., Aghebati-Maleki, L., Dolati, S., Mehdizadeh, A., Yousefi, M. and Ahmadian Heris, J (2022) 'The impact of Hyssop (Hyssopus officinalis) extract on activation of endosomal toll like receptors and their downstream signaling pathways', BMC Research Notes, 15(1), pp. 366. doi:10.1186/s13104-022-06253-3 Preclinical
https://doi.org/10.1186/s13104-022-06253-3 - Ma, X., Ma, X., Ma, Z., Wang, J., Sun, Z., Yu, W., Li, F. and Ding, J (2014) 'Effect of Hyssopus officinalis L. on inhibiting airway inflammation and immune regulation in a chronic asthmatic mouse model', Experimental and Therapeutic Medicine, 8(5), pp. 1371-1374. doi:10.3892/etm.2014.1978 Preclinical
https://doi.org/10.3892/etm.2014.1978 - Gholami, M., Jafari, F., Baradaran, Z., Amri, J., Azhdari-Zarmehri, H. and Sadegh, M (2020) 'Effects of aqueous extract of Hyssopus officinalis on seizures induced by pentylenetetrazole and hippocampus mRNA level of iNOS in rats', Avicenna Journal of Phytomedicine, 10(3), pp. 213-221. Preclinical
https://scholar.google.com/scholar?q=Effects%20of%20aqueous%20extract%20of%20Hyssopus%20officinalis%20on%20seizures%20induced%20by%20pentylenetetrazole%20and%20hippocampus%20mRNA%20level%20of%20iNOS%20in%20rats - Guerrini, A., Sacchetti, G., Echeverria Guevara, M.P., Paganetto, G., Grandini, A., Maresca, I., Menghini, L., Di Martino, L., Marengo, A. and Tacchini, M (2021) 'Wild Italian Hyssopus officinalis subsp. aristatus (Godr.) Nyman: From Morphological and Phytochemical Evidences to Biological Activities', Plants, 10(4), pp. 631. doi:10.3390/plants10040631 Preclinical
https://doi.org/10.3390/plants10040631 - Rashidi, S., Eikani, M.H. and Ardjmand, M (2018) 'Extraction of Hyssopus officinalis L. essential oil using instant controlled pressure drop process', Journal of Chromatography A, 1579, pp. 9-19. doi:10.1016/j.chroma.2018.10.020 Preclinical
https://doi.org/10.1016/j.chroma.2018.10.020 - Polaki, S., Stamatelopoulou, V., Kotsou, K., Chatzimitakos, T., Athanasiadis, V., Bozinou, E. and Lalas, S.I (2024) 'Exploring Conventional and Green Extraction Methods for Enhancing the Polyphenol Yield and Antioxidant Activity of Hyssopus officinalis Extracts', Plants, 13(15), pp. 2105. doi:10.3390/plants13152105 Preclinical
https://doi.org/10.3390/plants13152105 - Health Canada, Natural and Non-prescription Health Products Directorate (2026) 'Natural Health Product Monograph: Hyssop - Hyssopus officinalis'. Available at: https://webprod.hc-sc.gc.ca/nhpid-bdipsn/dbImages/mono_hyssop_english.pdf Traditional / reference
https://webprod.hc-sc.gc.ca/nhpid-bdipsn/dbImages/mono_hyssop_english.pdf - Royal Botanic Gardens, Kew (n.d.). Available at: https://powo.science.kew.org Traditional / reference
https://powo.science.kew.org - Duke, J.A (2002) 'Handbook of Medicinal Herbs, Second Edition'. Traditional / reference
https://scholar.google.com/scholar?q=Handbook%20of%20Medicinal%20Herbs%2C%20Second%20Edition
- Feyzabadi, Z., Ghorbani, F., Vazani, Y. and Zarshenas, M.M (2017) 'A Critical Review on Phytochemistry, Pharmacology of Viola odorata L. and Related Multipotential Products in Traditional Persian Medicine', Phytotherapy Research, 31(11), pp. 1669-1675. doi:10.1002/ptr.5909 Meta-analysis / review
https://doi.org/10.1002/ptr.5909 - Heger, T., Zatloukal, M., Kubala, M., Strnad, M. and others (2022) 'Procyanidin C1 from Viola odorata L. inhibits Na,K-ATPase', Scientific Reports, 12(1), pp. 7011. doi:10.1038/s41598-022-11086-y Preclinical
https://doi.org/10.1038/s41598-022-11086-y - Yousefnia, S., Naseri, D., Seyed Forootan, F., Tabatabaeian, M. and others (2020) 'Suppressive role of Viola odorata extract on malignant characters of mammosphere-derived breast cancer stem cells', Clinical & Translational Oncology, 22(9), pp. 1619-1634. doi:10.1007/s12094-020-02307-9 Preclinical
https://doi.org/10.1007/s12094-020-02307-9 - Tafazoli, V., Shahriari, M., Heydari, M., Nikbakht, H.A. and others (2020) 'The Effect of Viola odorata L. Oil for Fever in Children: A Randomized Triple-blinded Placebo-controlled Clinical Trial', Current Drug Discovery Technologies, 17(5), pp. 696-703. doi:10.2174/1570163816666190620142256 Randomized trial
https://doi.org/10.2174/1570163816666190620142256 - Rahimi, V.B., Askari, V.R., Emami, S.A. and Tayarani-Najaran, Z (2017) 'Anti-melanogenic activity of Viola odorata different extracts on B16F10 murine melanoma cells', Iranian Journal of Basic Medical Sciences, 20(3), pp. 242-249. doi:10.22038/ijbms.2017.8350 Preclinical
https://doi.org/10.22038/ijbms.2017.8350 - Adel Mehraban, M.S., Shirzad, M., Mohammad Taghizadeh Kashani, L., Ahmadian-Attari, M.M. and others (2022) 'Efficacy and safety of add-on Viola odorata L. in the treatment of COVID-19: A randomized double-blind controlled trial', Journal of Ethnopharmacology, 304, pp. 116058. doi:10.1016/j.jep.2022.116058 Randomized trial
https://doi.org/10.1016/j.jep.2022.116058 - Saleem, U., Hira, S., Anwar, F., Shah, M.A. and others (2021) 'Pharmacological Screening of Viola odorata L. for Memory-Enhancing Effect via Modulation of Oxidative Stress and Inflammatory Biomarkers', Frontiers in Pharmacology, 12, pp. 664832. doi:10.3389/fphar.2021.664832 Preclinical
https://doi.org/10.3389/fphar.2021.664832 - Shayesteh, M., Vaez-Mahdavi, M.R., Shams, J., Kamalinejad, M. and others (2020) 'Effects of Viola odorata as an Add-On Therapy on Insomnia in Patients with Obsession or Depression: A Pilot Randomized Double-Blind Placebo-Controlled Trial', Journal of Alternative and Complementary Medicine, 26(5), pp. 398-408. doi:10.1089/acm.2019.0254 Randomized trial
https://doi.org/10.1089/acm.2019.0254 - Feyzabadi, Z., Jafari, F., Kamali, S.H., Ashayeri, H. and others (2014) 'Efficacy of Viola odorata in Treatment of Chronic Insomnia', Iranian Red Crescent Medical Journal, 16(12), pp. e17511. doi:10.5812/ircmj.17511 Clinical study
https://doi.org/10.5812/ircmj.17511 - Parsley, N.C., Kirkpatrick, C.L., Crittenden, C.M., Rad, J.G. and others (2018) 'PepSAVI-MS reveals anticancer and antifungal cycloviolacins in Viola odorata', Phytochemistry, 152, pp. 61-70. doi:10.1016/j.phytochem.2018.04.014 Preclinical
https://doi.org/10.1016/j.phytochem.2018.04.014 - Herbal Reality (n.d.) 'Violets (Viola odorata): Benefits, Safety, Uses'. Available at: https://www.herbalreality.com/herb/violets/ Traditional / reference
https://www.herbalreality.com/herb/violets/ - Qasemzadeh, M.J., Sharifi, H., Hamedanian, M., Gharehbeglou, M., Heydari, M., Sardari, M., Akhlaghdoust, M. and Minae, M.B (2015) 'The Effect of Viola odorata Flower Syrup on the Cough of Children With Asthma: A Double-Blind, Randomized Controlled Trial', Journal of Evidence-Based Complementary & Alternative Medicine, 20(4), pp. 287--291. doi:10.1177/2156587215584862 Randomized trial
https://doi.org/10.1177/2156587215584862 - RxList (n.d.) 'Sweet Violet: Health Benefits, Side Effects, Uses, Dose & Precautions'. Available at: https://www.rxlist.com/supplements/sweet_violet.htm Traditional / reference
https://www.rxlist.com/supplements/sweet_violet.htm - Ghasemzadeh Rahbardar, M. and Hosseinzadeh, H (2024) 'Therapeutic potential of hypnotic herbal medicines: A comprehensive review', Phytotherapy Research, 38(6), pp. 3037-3059. doi:10.1002/ptr.8201 Meta-analysis / review
https://doi.org/10.1002/ptr.8201 - Block, K.I., Gyllenhaal, C. and Mead, M.N (2004) 'Safety and efficacy of herbal sedatives in cancer care', Integrative Cancer Therapies, 3(2), pp. 128-148. doi:10.1177/1534735404265003 Meta-analysis / review
https://doi.org/10.1177/1534735404265003 - Unruly Gardening 'Foraging Violets: How to Identify, Harvest and Use'. Available at: https://unrulygardening.com/foraging-violets/ Traditional / reference
https://unrulygardening.com/foraging-violets/
Generated automatically from the Omnia Sana plant database and its cited sources. For educational purposes only — not medical advice. Always consult a qualified practitioner before using medicinal plants.