Adhatoda vasica · Malabar nut · Adulsa · Adusa · Vasa · Adhatoda
500 mg · vegan · gluten-free · 60 caps
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Vasaka is the dried leaf of Adhatoda vasica, a shrub native to the Indian subcontinent and widely naturalized in tropical regions. It is one of the most important respiratory herbs in Ayurveda, used for cough, bronchitis, asthma, and chest congestion for over 2,000 years. The primary bioactive alkaloids are vasicine and vasicinone, which have documented bronchodilatory and expectorant properties.
Vasicine, the principal quinazoline alkaloid in vasaka, acts as a mild bronchodilator by relaxing smooth muscle in the bronchial tubes. Vasicinone enhances this effect while also thinning mucus (mucolytic action) and stimulating its expulsion (expectorant action). Together, they improve airflow and clear congestion. Animal studies also show anti-inflammatory and antitussive effects.
Adults with chronic cough, bronchitis, chest congestion, or mild asthma seeking traditional respiratory support. Also relevant for smokers and those exposed to urban air pollution. Not a substitute for prescribed bronchodilators or inhalers in moderate-to-severe asthma or COPD.
Avoid during pregnancy and breastfeeding. May lower blood pressure — use caution if on antihypertensives. Do not discontinue prescribed asthma or COPD medications without physician guidance. May interact with antiplatelet drugs and blood thinners.
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✓ Morning dosing helps with daytime congestion; evening dosing supports overnight breathing comfort
✓ Morning dosing helps with daytime congestion; evening dosing supports overnight breathing comfort
✓ Take with food to reduce the rare risk of gastric irritation from the alkaloid content
Vasicine, the principal quinazoline alkaloid in vasaka, acts as a mild bronchodilator by relaxing smooth muscle in the bronchial tubes.
Each bar = one cited trial. Effect varies by methodology, dose, and population.
Representative cohort from published RCT data
Relative to baseline (100). Data from published clinical literature.
Clinical review
→ Clinical review of multiple Ayurvedic formulations found Vasa Swarasa and Kwatha most effective for asthma symptoms; Vasa Avaleha showed consistent results across cough, congestion, and breathing difficulty.
Review
→ Systematic review confirmed bronchodilator, expectorant, and antitussive traditional uses while noting the need for modern RCTs to validate clinical efficacy.
Analytical study
→ Validated quantitative methods confirmed vasicine and vasicinone as the principal bioactive alkaloids in Adhatoda vasica leaf extracts, supporting standardization efforts.
B · Rich traditional clinical documentation and observational Ayurvedic studies support respiratory benefits. One clinical review compared multiple formulations and found consistent symptomatic improvement. Modern RCTs are sparse, but the pharmacological basis (vasicine bronchodilation) is well-established.
A plain-English read of the literature behind this supplement. Not a clinical recommendation.
Key citations: See richResearch section for study filters and participant data. Clinical evidence summarised from peer-reviewed journals.
How to use Vasaka specifically for Cough — the right dose, timing, blood markers to track, and how to know if it is working.
A clinical evidence review of Vasaka — RCT data, effect sizes, evidence grade, and what the numbers mean for your specific situation.
Everything you need to know about Vasaka — mechanism, dose, safety, buying guide for India, and what the research actually says.
SacredBod's longer take on Vasaka — context the structured blocks above don't capture.
Vasaka is the respiratory cornerstone of Ayurvedic medicine — a herb so central to cough and asthma management that it appears in virtually every classical text on the subject. Its traditional use is not merely folkloric; it is supported by a well-defined pharmacological mechanism involving vasicine, a quinazoline alkaloid with genuine bronchodilatory activity.
The 2011 clinical review (PMID 3202261) published in AYU evaluated multiple traditional formulations of Vasa (Adhatoda vasica) in the treatment of Tamaka Shwasa (asthma). The review compared Vasa Swarasa (fresh juice), Vasa Kwatha (decoction), Vasa Ghana (solid extract), Vasa Ghrita (medicated ghee), Vasarishta (fermented preparation), Vasavaleha (herbal jam), and Vasa Vati (tablet). The findings: Vasa Swarasa and Kwatha — the forms richest in vasicine and vasicinone — showed the most consistent clinical improvement across symptoms including Shwasa Kashtata (difficulty breathing), Kasa (cough), and Kanthodhvansa (throat irritation). Vasa Avaleha also performed well, likely because the honey and ghee base soothes inflamed mucosa while delivering the active alkaloids.
The 2022 systematic ethnobotanical review (PMID 35809281) confirmed bronchodilator, expectorant, and antitussive uses across multiple traditional medicine systems while explicitly noting the need for modern RCTs to validate these indications with contemporary methodology.
The 2008 analytical study by Avula et al. (PMID 18271297) developed and validated a method for quantifying vasicine and vasicinone in Adhatoda vasica extracts. This is critical for standardization — without knowing the alkaloid content, supplement quality is guesswork. The study confirmed that these two alkaloids are indeed the principal bioactive markers and can be reliably measured.
Vasicine is a quinazoline alkaloid that acts as a mild bronchodilator by relaxing smooth muscle in the bronchial tubes. In animal models, it increases the ciliary beat frequency in respiratory epithelium, enhancing mucus clearance. Vasicinone, its oxidation product, potentiates this effect while also reducing the viscosity of bronchial secretions. Together, they improve both airflow (bronchodilation) and mucus clearance (mucolytic + expectorant) — a dual action that explains vasaka’s traditional effectiveness.
Ayurveda does not use vasaka as a standalone powder in most cases. The classical preparations include:
Modern capsules containing 500 mg of leaf extract are a convenience product, but they may not replicate the traditional synergy of combined formulations.
For acute bronchitis and productive cough, mulethi (licorice root) has more modern clinical trial support. For asthma, prescription bronchodilators (salbutamol, formoterol) are vastly more reliable. For general respiratory immune support, tulsi has broader evidence. Vasaka’s value is in its specific bronchodilatory-expectorant mechanism and its deep integration into Ayurvedic respiratory practice — it is a specialist herb for congestion and airflow limitation, not a general immune tonic.
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