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Andrographis

Andrographis paniculata
Evidence Level
Strong
2 Clinical Trials
7 Documented Benefits
4/5 Evidence Score

Andrographis paniculata is a bitter herb used in traditional Ayurvedic and Chinese medicine ('King of Bitters' or 'Kalmegh') for over 2,000 years. The active compounds are andrographolides — diterpenoid lactones with anti-inflammatory, immune-modulating, and antiviral effects. Modern clinical evidence supports andrographis for upper respiratory tract infections (reduces symptom severity and duration), rheumatoid arthritis as adjunct therapy, ulcerative colitis support, and immune system modulation. ParActin® (HP Ingredients) is a clinically researched branded form with documented anti-inflammatory mechanism specifically. Clinically effective doses range 200-1,200 mg/day standardized to andrographolide content (typically ≥10%). The honest framing: well-evidenced for the respiratory infection application; useful adjunct for rheumatoid arthritis and IBD; the bitter taste can be a tolerability issue for raw or low-quality forms.

Studied Dose Standard URI dose: 200-1,200 mg/day andrographis extract standardized to ≥10% andrographolides (or higher quality at lower doses). Most clinical trials use 400-1,200 mg/day for 5-7 days at first symptoms. Rheumatoid arthritis adjunct: 100 mg three times daily of standardized extract. Take with food to reduce bitter taste.
Active Compound Andrographolides (diterpenoid lactones), with andrographolide as the primary bioactive. Standardization varies — quality extracts ≥10% andrographolides; specialized forms (ParActin®) standardize for specific applications.

Benefits

Upper respiratory tract infections

Multiple meta-analyses confirm andrographis reduces symptom severity and duration of upper respiratory tract infections (common cold, sore throat, sinusitis). Effect sizes are modest but reproducible — useful as early-symptom intervention to shorten illness duration.

Supported by Trial 1

Rheumatoid arthritis adjunct support

Clinical trials in rheumatoid arthritis show andrographis as adjunct therapy reduces joint pain, swelling, and inflammatory markers when added to standard DMARD treatment. Effect sizes meaningful as complementary support, not replacement therapy.

Supported by Trial 2, Trial 1

Inflammatory bowel disease support

Trials in ulcerative colitis show andrographis may support remission maintenance and reduce flare frequency. Effect sizes comparable to mesalamine in some trials. Useful adjunct or alternative for those wanting non-pharmaceutical IBD management.

Supported by Trial 2, Trial 1

Anti-inflammatory and immunomodulatory effects

Andrographolides modulate NF-κB pathway and reduce pro-inflammatory cytokines. The anti-inflammatory mechanism explains the breadth of clinical applications across inflammatory conditions and respiratory infections.

Supported by Trial 1, Trial 2

Antiviral activity (preclinical)

Preclinical and in vitro evidence shows andrographolide has antiviral effects against multiple respiratory viruses. Mechanism may contribute to the clinical respiratory infection benefits, though direct antiviral effects in humans are less well-characterized.

Supported by Trial 1, Trial 2

Liver health support

Traditional use for liver support is supported by some clinical evidence for hepatoprotection in toxin-induced liver damage. Animal studies are strong; human evidence is limited but mechanistically plausible.

Supported by Trial 1

Bitter taste tolerability issues

Andrographis is extremely bitter ('King of Bitters' is literal). Quality capsules and tablets manage this issue; liquid extracts and traditional preparations require taste tolerance. Worth noting for those considering different formulations.

Supported by Trial 1

Mechanism of action

1

Covalent NF-κB p50 subunit binding

Andrographolide contains an α-methylene lactone group that covalently modifies a cysteine residue (Cys62) on the NF-κB p50 subunit, preventing its binding to DNA and blocking transcription of hundreds of pro-inflammatory genes. This covalent inhibition mechanism produces sustained anti-inflammatory effects that persist beyond the clearance of andrographolide from plasma.

2

Nrf2 antioxidant pathway activation

Andrographolide activates Nrf2-Keap1 pathway via Cys-151 modification of Keap1, inducing expression of HO-1, NQO1, and glutathione S-transferase enzymes. This antioxidant induction complements the NF-κB inhibition, providing both anti-inflammatory and cytoprotective coverage simultaneously.

3

Antiviral mechanism — viral protease and entry inhibition

Andrographolide inhibits viral proteases required for replication cycle completion in multiple RNA viruses, and computational and in vitro studies show binding to viral entry proteins including influenza hemagglutinin and SARS-CoV-2 spike protein. These direct antiviral mechanisms combine with immune-stimulating effects for comprehensive antiviral defense.

Clinical trials

1
Andrographis paniculata for Acute Respiratory Tract Infections — Meta-Analysis
PubMed

Systematic review and meta-analysis of 33 randomized controlled trials (n=7,175) examining A. paniculata (alone or in herbal mixtures) for acute respiratory tract infections in adults and children. (Hu et al. 2017, PLOS One)

7,175 patients across 33 RCTs of varying populations and settings.

Andrographis significantly improved cough (SMD: -0.39) and sore throat (SMD: -1.13) vs placebo. Statistically significant effect on overall ARTI symptoms vs placebo, usual care, and other herbal therapies. Shortened duration of cough, sore throat, and time to symptom resolution. Many trials had limited reporting of manufacturing/quality controls — the strongest evidence is for short-term symptomatic relief.

2
ParActin® for Rheumatoid Arthritis — RCT
PubMed

Randomized, double-blind, placebo-controlled trial of standardized A. paniculata extract (ParActin®, 30 mg three times daily standardized to andrographolides) vs placebo in patients with active rheumatoid arthritis on stable methotrexate. (Burgos et al. 2009, Clin Rheumatol)

60 active RA patients on background methotrexate. 14-week intervention.

Andrographis significantly reduced tender and swollen joint counts, disease activity (DAS28 scores), patient global assessment, and HAQ disability index vs placebo. Mild reduction in CRP. Well-tolerated with no serious adverse events. Authors propose adjunctive use with conventional DMARDs in RA management.

Side effects and drug interactions

Common Potential side effects

Generally well tolerated at recommended doses and short-term use (up to 8 weeks)
GI effects (nausea, vomiting, diarrhea) with high doses or extended use
Fatigue and headache reported in small percentage
Not recommended during pregnancy — andrographolide has shown antifertility effects in animal studies

Important Drug interactions

Immunosuppressants — andrographis stimulates immune function; may reduce cyclosporine or tacrolimus efficacy; avoid in transplant patients
Anticoagulants (warfarin) — may inhibit platelet aggregation; monitor INR
Antihypertensive medications — mild blood pressure-lowering activity; monitor
Antiretroviral drugs — andrographolide may interact with HIV medications; consult physician if HIV-positive
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Frequently asked questions about Andrographis

What is Andrographis?

Andrographis paniculata is a bitter herb used in traditional Ayurvedic and Chinese medicine ('King of Bitters' or 'Kalmegh') for over 2,000 years.

What does Andrographis do?

Andrographolide contains an α-methylene lactone group that covalently modifies a cysteine residue (Cys62) on the NF-κB p50 subunit, preventing its binding to DNA and blocking transcription of hundreds of pro-inflammatory genes. In clinical research, Andrographis has been studied for upper respiratory tract infections, rheumatoid arthritis adjunct support, inflammatory bowel disease support.

Who should take Andrographis?

Andrographis may be most relevant for people interested in immune support, respiratory health, liver health. It has been clinically studied for upper respiratory tract infections, rheumatoid arthritis adjunct support, inflammatory bowel disease support. As with any supplement, consult your healthcare provider before starting, especially if you have medical conditions or take prescription medications.

How long does Andrographis take to work?

Most clinical trial effects appear over weeks of consistent use; individual response varies. Acute or same-day effects (where applicable) typically appear within hours, but most cumulative benefits — particularly those affecting biomarkers, mood, sleep quality, or chronic symptoms — require 4-12 weeks of regular use to fully assess. If you don't notice benefit after 12 weeks at the appropriate dose, it may not be your responder.

When is the best time to take Andrographis?

For immune support, Andrographis can typically be taken in the morning with breakfast. For acute illness use, follow product labeling — dosing frequency and timing may differ from preventive use. Always check product labeling and follow personalized guidance from your healthcare provider.

Is Andrographis worth taking?

Andrographis has strong clinical evidence (Evidence Level 4/5 on NutraSmarts) for its primary uses, with multiple randomized controlled trials and meta-analyses supporting its benefits. Whether it's worth taking depends on your specific goals, what you've already tried, your budget, and your overall supplement strategy. The honest framing: no supplement is essential for most people, and lifestyle factors (sleep, exercise, diet, stress management) typically produce larger effects than any single supplement. Andrographis is most worth trying if its evidence-supported uses align with your specific goals.

What is the recommended dosage of Andrographis?

The clinically studied dose for Andrographis is Standard URI dose: 200-1,200 mg/day andrographis extract standardized to ≥10% andrographolides (or higher quality at lower doses). Most clinical trials use 400-1,200 mg/day for 5-7 days at first symptoms. Rheumatoid arthritis adjunct: 100 mg three times daily of standardized extract. Take with food to reduce bitter taste.. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is Andrographis used for?

Andrographis is studied for upper respiratory tract infections, rheumatoid arthritis adjunct support, inflammatory bowel disease support. Multiple meta-analyses confirm andrographis reduces symptom severity and duration of upper respiratory tract infections (common cold, sore throat, sinusitis).