Vanira (Namraka, Vanjula, Vetasa)
Vanira, known as Salix tetrasperma, is a plant traditionally used in Ayurveda and other traditional medicine systems. It is known for its analgesic, anti-inflammatory, antipyretic, and potential hypoglycemic properties.
Botanical name: Salix tetrasperma. Also known as: Indian Willow, Four-seed Willow, Jalvetas, Varuna, Vanira, Badah, Badhla, Baishi, Bhinsu, Bains, Bod, Jalmala, Laila, Sukul bet, Walunj, Arali, Atrupala, Attupala, Puzhappanji, Vanchi, Vanchimaram, Atrupalai, Nirvani, Vanji, Eetipala, Bainsa.
Properties
Analgesic and anti-inflammatory effects due to salicin conversion to salicylic acid, Antioxidant activity of flavonoids, Astringent action of tannins
Dosage
Speak to your doctor to determine the appropriate dose for you. For prepared drugs with defined potency, the dosage is specified in the patient information leaflet. The recommended daily dose in terms of salicylic derivatives (salicylates) is 120 to 240 mg. For tea, drink a cup of willow bark tea 3 to 4 times daily; average daily dose for adults is 4 to 12g of the drug.
Classical attributes
- Rasa: Bitter, Astringent
- Virya: ["Cooling"]
- Vipaka: ["Pungent"]
Benefits
- Digestive
- Astringent
- Anti-inflammatory
- Antipyretic
- Diuretic
- Laxative
Traditional uses
- Fever
- Pain
- Inflammation
- Diabetes
- Skin conditions
- Rheumatoid arthritis
- Lower back pain
Dosha effects
- vata: balancing
- kapha: balancing
- pitta: balancing
Preparation methods
- Tea: Mix 2-3 g of finely chopped or coarsely powdered willow bark with 150ml of cold water, bring the mixture to the boil, remove from heat, and strain after 10 minutes.
- Paste: Paste of both leaf and root used externally for scorpion stings, bug bites, sores and warts.
- Decoction: Decoction of dried root taken internally for treatment of hepatitis and whooping cough in children.
- Sap: Sap of stem taken orally for dysmenorrhea.
- Hot water extract: Hot water extract of entire plant instilled in vaginal cavity as abortifacient; rectally to treat local rectal sores.
- Other uses: In India, the new flowers are lightly boiled and mixed with mashed potatoes.
Contraindications
- Not recommended for children under 12 without professional supervision due to the risk of Reye's-like syndrome.
- Generally avoided during pregnancy due to potential uterine stimulation; best avoided or used under strict guidance.
- Contraindicated in Peptic Ulcer Disease unless the decoction is low-dose and well-buffered with milk or honey.
- May potentiate anticoagulant drugs (like warfarin) and NSAIDs, increasing bleeding risk.
- Avoid if allergic to aspirin or related compounds.
Side effects
- Gastrointestinal discomfort (e.g., nausea, stomachache)
- Dizziness
- Skin rash, hypersensitivity reactions of the skin
- Anaphylactic reaction
- Stomach upset, ulcers
- Nausea, vomiting
- Stomach bleeding
- Skin rash
- Stomach inflammation/irritation
- Kidney inflammation
- Tinnitus (ringing in the ears)
Interactions
- Alcohol, barbiturates, sedatives, and other salicylate-containing products should be avoided because of potential additive irritant effects, including GI tract and platelet function adverse reactions.
- Anticoagulants (blood-thinning medications): Willow bark may strengthen the effects of drugs and herbs with blood-thinning properties, and increase the risk of bleeding.
- Beta blockers: Willow bark may make these drugs less effective.
- Diuretics (water pills): Willow bark may make these drugs less effective.
- Nonsteroidal anti-inflammatory drugs: Taking willow bark with these drugs may increase risk of stomach bleeding.
- The effect of anticoagulant drugs may increase, and the effect of drugs to increase uric acid excretion may be reduced.
- Salix cortex extracts showed a drug interaction potential, with different potency, at higher concentrations, inhibiting CYP1A2 and CYP3A4 enzyme activity.
Clinical evidence
Limited clinical trials and animal studies support the use of Salix tetrasperma for pain relief (osteoarthritis, lower back pain), rheumatoid arthritis, fever reduction, and diabetes management. Meta-analyses indicate potential benefits for pain relief in arthritis, but the certainty of evidence is still inadequate, and further RCTs are needed. Animal studies have shown pain-relieving, anti-inflammatory, antidiabetic, diuretic, and laxative activities.
Ayurvedic karmas
- Digestive
- Astringent
- Anti-inflammatory
- Antipyretic
- Diuretic
- Laxative
Classical clinical indications
- Fever
- Pain
- Inflammation
- Diabetes
- Skin conditions
- Rheumatoid arthritis
- Lower back pain
Frequently asked questions
What is Vanira?
Vanira, known as Salix tetrasperma, is a plant traditionally used in Ayurveda and other traditional medicine systems. It is known for its analgesic, anti-inflammatory, antipyretic, and potential hypoglycemic properties.
What are the benefits of Vanira?
Digestive. Astringent. Anti-inflammatory
How is Vanira used in Ayurveda?
Tea: Mix 2-3 g of finely chopped or coarsely powdered willow bark with 150ml of cold water, bring the mixture to the boil, remove from heat, and strain after 10 minutes.