[header] How to use herbs to treat the flu [title] Take andrographis as soon as you notice flu symptoms. [step] Andrographis may reduce the severity of flu symptoms and the length of illness if it is taken as soon as the symptoms start. Make sure that you talk to your doctor before trying this herb. 
[substeps] Do not use andrographis if you have high or low blood pressure, diabetes, take a blood thinner, have an immune disorder, or if you are pregnant or trying to become pregnant. Choose a supplement that has been standardized to 4-5.6 mg andrographolide.