Isatis is one of the most effective TCM herbs used as an herbal antibiotic, antiseptic and anti-viral. TCM doctors use it whenever there are signs of fever or toxic heat from viral illness, blood poisoning, Leukemia, Hepatitis, meningitis, scarlet fever, sinus infections, Laryngitis, Tonsillitis, mumps, and other similar ailments.  It is an effective alternative to Western prescription antibiotics in some cases.  Although the root is used most commonly, the leaves are useful as well.  TCM doctors say isatis leaves "go to the upper part of the body" more than the root, so leaves are used for upper respiratory infections along with the root. Uses of isatis root in TCM are listed as follows.

Cures colds and colors clothes
Along with vinegar, isatis root became a household name during SARS due to its supposed toxin-killing capabilities in combating the disease, but its use goes back to the Tang era (618-907). Predominantly used as a cough and cold buster, banlangen was harvested during fall and consumed to cool the body and fight bacteria. During the Song Dynasty (960-1279), however, Bai minority pioneers discovered banlangen's other use: its leaves, along with indigo and wormwood can be used to dye cloth.

Kill coughs
Respiratory infections such as mild tonsillitis, bronchitis, and sinitis don't stand a chance when confronted with isatis root. Containing tryptanthrim (bacteria killer), banlangen fights inflammation and reduces fever, but its effectiveness depends on timing:  The secret is to use banlangen at the first sign of a tickly throat.

Prescription: Wash and cut banlangen root and boil for five minutes. Drink the brew three times days a week, 30 minutes after a meal. Add honey to soothe throats and appease bitter aftertaste.

Fight inflammation
In Chinese medicine, it is believed that banlangen acts as a natural anti-inflammatory and alleviates infections of the intestinal tract, kidney and bladder. Herbs such as banlangen, chamomile and dandelion are well known kidney enhancers.

Prescription: Follow the tea prescription above or brew a concoction of banlangen, chamomile and dandelion (found at Tong Ren Tang pharmacy outlets around the country). If conditions haven't improved after one week, consult your doctor.