Andrographis
Also known as: Andrographis paniculata, Kalmegh, King of bitters, Andrographolide
The bitter immune herb of Ayurveda and TCM — one of the better-evidenced botanicals for shortening common colds.
In short
Andrographis (Andrographis paniculata) is an intensely bitter herb used in Ayurveda, Traditional Chinese Medicine, and Thai medicine for infections and fevers — the 'king of bitters.' Its active compound, andrographolide, has documented anti-inflammatory, antiviral, and immune-modulating activity in laboratory studies, and human trials give it one of the better evidence bases of any immune botanical: systematic reviews find andrographis (often with eleuthero, as Kan Jang) shortens common-cold duration and reduces symptom severity, with data strongest when started early. It is well tolerated, with the main cautions being taste (in tea form), GI upset at high doses, and insufficient pregnancy data.
- Bitter herb of Ayurveda, TCM, and Thai medicine
- Active: andrographolide — antiviral and anti-inflammatory
- Cochrane/meta-analyses: shortens colds, reduces symptoms
- Start early for best results; bitter taste in teas
What is Andrographis?
Andrographis is the herb that earned its title — 'king of bitters' — through a taste so intense that traditional texts treated bitterness itself as the medicine. The modern evidence agrees, if for different reasons: andrographolide, the herb's signature compound, dampens viral replication and calms the inflammatory storm of infection, and randomized trials consistently find that taking andrographis at the first sniffle shortens colds and eases symptoms. Among immune herbs, its evidence base sits unusually close to the top, which is why it anchors so many European cold formulas despite its distinctly non-European flavor.
Where it comes from
Natural sources
- Aerial parts of Andrographis paniculata, native to South Asia
- Core of Ayurvedic and TCM infection formulas for centuries
- Actives: diterpene lactones, chiefly andrographolide
How it's made
Standardized extracts (typically 10–30% andrographolides), capsules, and teas; common pairing with eleuthero (Kan Jang).
What it does in products
Benefits
Common-cold duration and symptoms
strong evidenceSystematic reviews of randomized trials find andrographis shortens cold duration by roughly 1–2 days and reduces symptom severity, especially when started within 48 hours.
Upper-respiratory infection support
moderate evidenceTrials cover pharyngitis and sinusitis-type presentations, with consistent symptom improvement versus placebo.
Immune modulation
moderate evidenceLaboratory studies document broad immune effects, including enhanced phagocytosis and anti-inflammatory signaling.
Side effects & safety
Safety considerations
- Avoid — traditional use associates andrographis with uterine activity, and animal data raise caution.
- Immunosuppressants — theoretical immune-stimulation conflict
- Anticoagulants/antiplatelets — mild additive effects possible
- Not for: Pregnancy
- Not for: Active autoimmune disease on immunosuppressive therapy (caution)
How it's used
In supplements
1,200–6,000 mg/day of standardized extract (typically 30–60 mg andrographolides), started within 48 hours of symptoms; short courses of 3–7 days.
In skincare
Not a topical ingredient.
Regulatory status
- Sold as a dietary supplement; no FDA-approved disease claims.
- Not applicable.
Popular products containing Andrographis
- Kan Jang (andrographis + eleuthero) — The most-studied cold formulaSwedish Herbal Institute · Supplement
- NOW Andrographis Extract — Standardized 10% andrographolidesNOW Foods · Supplement
- Paradise Herbs Andrographis — Traditional extract capsulesParadise Herbs · Supplement
Product names and brands are shown for reference and belong to their respective owners.
The evidence base
A Cochrane review and subsequent meta-analyses pooled roughly a dozen trials: andrographis, alone or with eleuthero, consistently reduced cold symptom scores and shortened illness versus placebo. Effects were modest — the difference between a 5-day and a 7-day cold — but consistent across populations and years, which is more than most immune botanicals can claim.
Timing discipline
The positive trials dosed andrographis within 24–48 hours of symptom onset. Like antivirals, its benefit concentrates in early intervention — a point worth remembering when deciding between the cabinet and the couch.
Frequently asked questions
Does andrographis prevent colds or treat them?
The evidence is for treatment — shorter, milder colds when started early. Prevention data are much weaker.
Is andrographis safe with autoimmune conditions?
Its immune-stimulating profile warrants caution in autoimmune disease, especially on immunosuppressants — discuss with your doctor.
Why is it called the king of bitters?
Its andrographolide content makes it one of the bitterest plants in the pharmacopeia — traditionally taken as a bitter tonic, now usually encapsulated to dodge the taste.
The bottom line
Andrographis is one of the best-evidenced immune botanicals for shortening colds when started early — the bitter herb whose modern trial file finally matches its traditional reputation.
References
- Andrographis paniculata for upper respiratory infection. Cochrane Database of Systematic Reviews. https://pubmed.ncbi.nlm.nih.gov/15495066/
- Andrographolide: pharmacology review. PubMed Central. https://pubmed.ncbi.nlm.nih.gov/31027457/
- Andrographis — NCCIH. NCCIH. https://www.nccih.nih.gov/health/andrographis