Andrographis supplements have been shown to improve cold symptoms and possibly prevent colds.
Andrographis grows in many parts of Asia. Also known as Indian ginseng, it has a long history of use for an eclectic mix of purposes. Best known for boosting the immune system, WebMD says claims that it put the brakes on the 1919 flu epidemic in India remain unproven. Research does support some of its purported uses, but many suggested uses do not have any scientific backing behind them.
Treating Colds and Flu
Andrographis probably has the strongest association with treating colds and flu and, according to WebMD, research indicates that taking andrographis within 3 days of the onset of a cold can provide significant symptom relief -- typically beginning within two days. It also appears to lessen severity of flu symptoms. Clinical research looking at these effects used a particular supplement that combined this herb with Siberian ginseng. Whether or not it prevents colds has not been as clearly established though WebMD notes research has shown those who take the supplement for two months are 50 percent less likely to come down with a cold. Memorial-Sloan Kettering Cancer Center reports andrographis has demonstrated antiviral properties in testing.
Other Possible Uses
Sloan Kettering says some studies have found this herb exerted a relaxing effect on smooth muscles that lowered blood pressure and heart rate. It notes it has also demonstrated antibacterial, anti-inflammatory, anti-ulcerogenic, anti-tumor and pain-relieving properties. WebMd notes it has many traditional uses, though they do not have sufficient evidence behind them. A partial list includes treating infections of all kinds, HIV, cancer, diabetes, skin infections and digestive complaints.
Usage
WebMD notes adults can probably take this herb safely for up to three months; whether or not it remains safe after this time has not been established. It ranks it as "possibly safe" for children when used for up to one month; talk to your doctor before giving your child andrographis. Dosages used in studies for the common cold used between 4.5 and 6 mg of its active component andrographolide.
Side Effects and Interactions
Because of its immune-stimulating effects, the drug could prove problematic if you have a condition triggered by an overactive immune system like multiple sclerosis or rheumatoid arthritis; taking it at the same time as medications used to suppress immune activity could interfere with their actions. Using it at the same time as medications to lower blood pressure could cause dangerous drops. Its relaxing effects on smooth muscles include the uterus, which could cause a miscarriage. Andrographis could compound the effects of anti-clotting medications, increasing the risk of bruising and bleeding. Possible side effects include fatigue, runny nose, headache, allergic reaction, nausea, diarrhea, lymph node pain and swelling, diarrhea and vomiting.
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