Method for induding andrographolide by cyclodextrin and medicinal preparation

The present invention discloses a method for including andrographolide by using cyclodextrin and its medicinal preparation. The andrographolide is an importent active extract of medicinal plant andrographis. Its inclusion method includes: adding 10-60g of cyclodextrin or its derivative into distilled water and dissolving it; adding 6g of andrographolide extract into 5-10 ml of medicinal methyl alcohol, heating and dissolving it; pouring the cyclodextrin aqueous solution into andrographolide ethyl alcohol solution; ultrasonic vibrating mixed solution in ultrasonic generator for 20-30 min., adopting thin-layer chromatography to identify the cyclodextrin-andrographolide inclusion quality. It does not change chemical property and effective activity of the andrographolide, can be prepared intovarious dosage forms.