Plant Comparison
Lungwort 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
Lungwort and Sweet Violet: they share 7 indicated uses (arthritis / joint pain, bronchitis, cough, …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Lungwort | Sweet Violet | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 2/10 | 1/10 | Comparable evidence |
| Bronchitis | 1/10 | 5/10 | Stronger for Sweet Violet |
| Cough | 1/10 | 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 |
| Sore throat | 1/10 | 1/10 | Comparable evidence |
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
The main antioxidant and COX-2-inhibiting constituents; LC-MS/MS profiling of the aerial parts identified dozens of phenolic compounds (caffeic acid esters and danshensu/dicaffeic-acid conjugates), nine of them previously undescribed, with marked seasonal variation.
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
Traditional demulcent / expectorant for cough, bronchitis, sore throat and respiratory catarrh (mucilage and saponins)
Traditional demulcent / expectorant for cough, bronchitis, sore throat and respiratory catarrh (mucilage and saponins)
inferred from anti-inflammatory action
Traditional demulcent / expectorant for cough, bronchitis, sore throat and respiratory catarrh (mucilage and saponins)
inferred from demulcent action
Traditional demulcent / expectorant for cough, bronchitis, sore throat and respiratory catarrh (mucilage and saponins)
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
As a member of the borage family (Boraginaceae), which can contain hepatotoxic pyrrolizidine alkaloids, prolonged or high-dose internal use is best avoided; use in pregnancy and breastfeeding is not recommended.
Traditional use only; clinical evidence in humans is limited, so a cough or respiratory complaint that persists needs medical assessment.
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
Low, hairy perennial herb (Boraginaceae), 15-30 cm tall. Basal leaves are long-stalked, ovate to lance-shaped, often white-spotted - the spotted pattern was historically likened to diseased lung tissue under the medieval Doctrine of Signatures, giving rise to the name 'lungwort' - and covered in bristly hairs. Funnel-shaped flowers open pink and turn blue as they mature, borne in small coiled clusters (cymes).[10]
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
Native to central and southern Europe, growing in damp, shaded woodland, hedgebanks and scrub on humus-rich soils; widely cultivated as a shade garden plant.[10]
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
Aerial flowering parts are cut during flowering (spring); the plant can also be gathered later in the growing season, though the phenolic constituent profile is documented to differ measurably between spring and autumn harvests.[11]
Flowers are picked as they open in early spring; leaves can be gathered through the growing season and dried.[11]
Traditional Uses
Lungwort's spotted leaves inspired its traditional use, under the Doctrine of Signatures, as a remedy for lung and respiratory complaints - coughs, bronchitis, catarrh and sore throat - valued for its soothing mucilage and astringent tannins. Modern research confirms antioxidant and anti-inflammatory (COX-2-inhibiting) activity of its phenolic-rich extract, though clinical trial evidence in humans remains limited.[10]
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 aerial parts steeped in hot water, the traditional respiratory remedy.
Dosage
Traditional guidance suggests roughly 2-4 g dried herb per cup as an infusion, up to three times daily, for short-term use; avoid prolonged or high-dose internal use given the borage family's potential pyrrolizidine-alkaloid content. Educational reference only, not a prescription.
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
- Ignjatijevic, A., Andjic, T., Ljesevic, M., Nikolic, B. and others (2025) 'Assessment of Antioxidant Activity and Dose-Dependent Effect on Genotoxicity/Antigenotoxicity of Pulmonaria officinalis Ethanolic Extract', Pharmaceutics, 17(9), pp. 1134. doi:10.3390/pharmaceutics17091134 Preclinical
https://doi.org/10.3390/pharmaceutics17091134 - Krzaczek, T. and others (1995) 'Flavonoid glycosides from aerial parts of Pulmonaria officinalis', Planta Medica, 61(5), pp. 488. doi:10.1055/s-2006-959385 Preclinical
https://doi.org/10.1055/s-2006-959385 - Krzyzanowska-Kowalczyk, J. and others (2019) 'Pulmonaria officinalis L. Extract in Cystic Fibrosis: In Vitro Evidence on Staphylococcus aureus Clinical Isolates', Molecules, 24(6), pp. 1151. doi:10.3390/molecules24061151 Preclinical
https://doi.org/10.3390/molecules24061151 - Neagu, E., Radu, G.L., Albu, C. and Paun, G (2016) 'Antioxidant activity, acetylcholinesterase and tyrosinase inhibitory potential of Pulmonaria officinalis and Centaurium umbellatum extracts', Saudi Journal of Biological Sciences, 25(3), pp. 578-585. doi:10.1016/j.sjbs.2016.02.016 Preclinical
https://doi.org/10.1016/j.sjbs.2016.02.016 - Akram, M. and Rashid, A (2017) 'Anti-coagulant activity of plants: mini review', Journal of Thrombosis and Thrombolysis, 44(3), pp. 406-411. doi:10.1007/s11239-017-1546-5 Meta-analysis / review
https://doi.org/10.1007/s11239-017-1546-5 - Byshevskii, A.Sh., Gerbert, I.Ia., Dement'eva, I.A., Leven, P.I. and Chiriat'ev, E.A (1990) 'Nature, properties and the mechanism of the effect on blood coagulation of the preparation obtained from Pulmonaria officinalis', Gematologiia i Transfuziologiia, 35(10), pp. 6-9. Preclinical
https://scholar.google.com/scholar?q=Nature%2C%20properties%20and%20the%20mechanism%20of%20the%20effect%20on%20blood%20coagulation%20of%20the%20preparation%20obtained%20from%20Pulmonaria%20officinalis - Ivanova, D., Gerova, D., Chervenkov, T. and Yankova, T (2005) 'Polyphenols and antioxidant capacity of Bulgarian medicinal plants', Journal of Ethnopharmacology, 96(1-2), pp. 145-150. doi:10.1016/j.jep.2004.08.033 Preclinical
https://doi.org/10.1016/j.jep.2004.08.033 - Neuhauser, C., Schwarzinger, B., Schwarzinger, C., Feichtinger, M. and others (2024) 'Insulin-Mimetic Activity of Herbal Extracts Identified with Large-Scale Total Internal Reflection Fluorescence Microscopy', Nutrients, 16(14), pp. 2182. doi:10.3390/nu16142182 Preclinical
https://doi.org/10.3390/nu16142182 - Luthy, J., Brauchli, J., Zweifel, U., Schmid, P. and Schlatter, C (1984) 'Pyrrolizidine alkaloids in medicinal plants of Boraginaceae: Borago officinalis L. and Pulmonaria officinalis L', Pharmaceutica Acta Helvetiae, 59(9-10), pp. 242-246. Preclinical
https://scholar.google.com/scholar?q=Pyrrolizidine%20alkaloids%20in%20medicinal%20plants%20of%20Boraginaceae%3A%20Borago%20officinalis%20L.%20and%20Pulmonaria%20officinalis%20L. - Krzyzanowska-Kowalczyk, J., Kowalczyk, M., Ponczek, M.B., Pecio, L., Nowak, P. and Kolodziejczyk-Czepas, J (2021) 'Pulmonaria officinalis and Pulmonaria obscura Extracts as Mitigators of Peroxynitrite-Induced Oxidative Stress and Cyclooxygenase-2 Inhibitors - In Vitro and In Silico Studies', Molecules. doi:10.3390/molecules26030631 Traditional / reference
https://doi.org/10.3390/molecules26030631 - Krzyzanowska-Kowalczyk, J. and Pecio, L. and Moldoch, J. and Ludwiczuk, A. and Kowalczyk, M (2018) 'Novel Phenolic Constituents of Pulmonaria officinalis L. LC-MS/MS Comparison of Spring and Autumn Metabolite Profiles', Molecules, 23(9). doi:10.3390/molecules23092277 Traditional / reference
https://doi.org/10.3390/molecules23092277 - Krzyzanowska-Kowalczyk, J., Kolodziejczyk-Czepas, J., Kowalczyk, M., Pecio, L., Nowak, P. and Stochmal, A (2017) 'Yunnaneic Acid B, a Component of Pulmonaria officinalis Extract, Prevents Peroxynitrite-Induced Oxidative Stress in Vitro', Journal of Agricultural and Food Chemistry, 65(19), pp. 3827--3834. doi:10.1021/acs.jafc.7b00718 Preclinical
https://doi.org/10.1021/acs.jafc.7b00718
- 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.