Spilanthes / Toothache Plant
Important Disclaimer
This is not medical advice. Consult a qualified healthcare provider before using any remedy, especially if pregnant, breastfeeding, on medication, or managing a health condition.
Overview
Spilanthes is one of the most fascinating medicinal plants in the world — its flower heads contain spilanthol, a potent alkylamide compound that triggers an intense tingling, numbing, salivating sensation in the mouth (hence 'electric daisy' and 'toothache plant'). The tingling is the medicine — it directly activates TRPV1 receptors in pain neurons (the same receptors activated by capsaicin and piperine), initially exciting then desensitizing them, causing numbness. Beyond dental pain, spilanthes is a powerful immunostimulant, antifungal, and anti-parasitic herb with extensive traditional use in South America.
Traditional Use
Spilanthes is native to the Amazon basin and has been used in Amazonian folk medicine for thousands of years. The Guarani people of South America used the fresh flower heads directly on teeth and gums for toothache and dental infections — a use that perfectly explains the common name. Amazonian tribes also used it for throat infections, malaria, and intestinal parasites. In Ayurvedic medicine (it was introduced from the Americas), it is known as Akarkara and used for dental pain, digestive disorders, and as an immune tonic. The extraordinary taste experience of spilanthes has made it extremely popular in modern gastronomy (molecular cooking, cocktails) and herbal medicine simultaneously. It is now cultivated worldwide and appreciated for its combination of culinary thrill and genuine medicinal properties.
Key Active Compounds
Spilanthol (N-isobutylamide of 2,6,8-decatrienoic acid)
The primary active compound — an alkylamide (same class as compounds in Echinacea) that activates TRPV1 and TRPA1 channels, causing the characteristic tingling-numbness. Has local anesthetic, antifungal, anti-parasitic, and immunostimulant activity. Also inhibits acetylcholinesterase, contributing to salivation and nerve effects.
Polyacetylenes and Additional Alkylamides
Synergistic compounds enhancing the immunostimulant and antimicrobial activity. The alkylamide profile is similar to Echinacea's active compounds, explaining the shared immune-boosting activity.
Flavonoids (Quercetin, Kaempferol) and Phenolic Acids
Anti-inflammatory and antioxidant compounds contributing to the overall therapeutic effect.
Evidence-Based Benefits
Toothache and Dental Pain Relief
Traditional use + laboratoryThe classic and most famous use. Fresh flower heads applied directly to the tooth or gum provide rapid local anesthetic relief through TRPV1 desensitization. Laboratory studies confirm the mechanism. While a temporary measure, the effect is clinically significant and the mechanism is pharmacologically sound.
Immune Stimulation
Some studiesSpilanthol strongly activates macrophage and NK cell function, similar to Echinacea alkylamides. Clinical and laboratory evidence supports use for upper respiratory infections, recurrent infections, and immune deficiency states.
Antifungal and Anti-Candida
Some studiesIn vitro studies confirm potent antifungal activity against Candida albicans and dermatophytes. Traditional Amazonian use for fungal infections. Topical application for oral thrush, skin fungal infections, and systemic Candida support.
Anti-parasitic
Traditional use + some studiesTraditional Amazonian use for intestinal parasites confirmed by some laboratory studies showing activity against Giardia, Leishmania, and other protozoa. A key herb for tropical medicine traditions.
Common Preparation Methods
Fresh Flower for Toothache (Direct Application)
Place 1–2 fresh or dried flower heads directly on the affected tooth or gum. Hold in place and chew gently.
Dosage: Apply as needed for pain relief — effect lasts 15–30 minutesImmediate, dramatic tingling followed by numbness within 1–2 minutes. This is a temporary pain relief measure — seek dental care for the underlying cause. Both fresh and dried flowers work. Fresh is more potent. The sensation is intense but not harmful — warn patients before use.
Tincture (Immune and Systemic Use)
Use a 1:5 tincture of fresh or dried flowers/leaves in 60% alcohol to best preserve spilanthol.
Dosage: 2–4ml 2–3 times daily during acute illness; 1–2ml daily for preventionThe tincture should cause the characteristic tingling on the tongue — this confirms potency. No tingle = likely degraded or weak product. Use 2–3 weeks for immune support then take a break. Excellent combined with Echinacea for respiratory infections.
Safety & Cautions
Please read carefully before use
Contraindications
- Pregnancy — emmenagogue activity at high doses; avoid therapeutic use
- Allergy to Asteraceae (daisy family) — cross-reactivity possible
- Children under 2 — avoid
- Autoimmune diseases — immunostimulant; use with caution
Drug Interactions
- Immunosuppressants — immunostimulant; counteracts
- Blood pressure medications — mild hypotensive effect; monitor
Possible Side Effects
- Generally safe at normal doses
- Excessive consumption: prolonged tingling, increased salivation
- Rare: allergic reactions in Asteraceae-sensitive individuals
- Very high doses: nausea
Special Populations
- Safe for adults at traditional doses
- Excellent for immune support — short-term use during illness
- Avoid therapeutic doses in pregnancy
- Children over 2 — the dramatic tingling sensation can be distressing; use with caution and in small doses
Sources & References
Phytotherapy Research
Quick Reference
Asteraceae
Fresh or dried flower heads and leaves (primary), Whole aerial plant
Intensely tingly, electrifying, numbing, peppery — one of the most unique taste experiences in all herbalism. A single fresh flower head causes prolonged tingling and salivation. The sensation is dramatic and unmistakable.
Safety First
Always consult with a qualified healthcare provider before starting any new remedy, especially if you have existing health conditions or take medications.