Andrographis (Andrographis paniculata)
What Is Andrographis?
Andrographis is the common name for Andrographis paniculata, a plant of the Acanthaceae family, native to India and Sri Lanka. The material in circulation is leaf, whole plant — leafy growth taken above ground. The common name Andrographis and the botanical name Andrographis paniculata refer to the same material, and labels may use either — a detail that matters when related species in the same genus are not interchangeable. Its character is described as intensely bitter, herbaceous, which is often how the raw material is checked for quality.
Andrographis entered the reference literature through use rather than through chemistry. Older sources are concerned with where it grows, when it is gathered and how it is prepared, questions that still shape the material on sale today. Beyond its practical use it carries cultural associations — known as 'King of Bitters' — symbolizes resilience and used in Ayurveda to strengthen Agni (digestive fire).
Today most searches for Andrographis come from people reading about lung support, colds & flu, fever and infection, or checking how it sits alongside a medication they already take. The use most often documented in the literature is may reduce severity and duration of upper respiratory infections, followed by anti-inflammatory (andrographolide inhibits NF-κB).
How Does Andrographis Work?
Andrographis is not a single active substance. Its chemistry is a mixture, and the fractions that researchers isolate most often are Andrographolide. Andrographolide is the fraction most often standardised in extracts, associated in the literature with immunostimulant diterpenoid.
Traditional practice described Andrographis in terms of taste, warmth and preparation rather than molecules — a working vocabulary that predicted which extractions were worth making long before any compound was isolated.
The research base is developing: there are human trials, though sample sizes and designs vary, and this profile cites 3 sources. Reported findings centre on cochrane-quality systematic review of 33 RCTs supports efficacy for acute URIs. Where research exists, it examines may reduce severity and duration of upper respiratory infections, anti-inflammatory (andrographolide inhibits NF-κB) and hepatoprotective in animal models. These are areas of study, not established outcomes, and results differ by preparation and dose.
How the plant is prepared changes what you actually get. Its constituents move readily into water and alcohol — so a preparation made in another medium will not carry the same fraction of the plant, which is why traditional recipes specify one over another.
The reason Andrographis is treated as its own entry rather than a substitute for a related plant is proportion: related species share several of these compound classes, but not in the same ratio or concentration.
Because these constituents are processed by the same pathways that handle many medicines, Andrographis is documented as interacting with anticoagulants, immunosuppressants and antihypertensives. That is a question of shared metabolism rather than of potency, and it is the main reason the plant is listed in interaction references at all.
Dose, plant part and growing conditions all shift the constituent profile, so two products carrying the name Andrographis can differ substantially; this is why reference entries specify leaf, whole plant and, where they exist, standardisation markers.