White-flower Snake Tongue Herb and Sempervirens cannot cure lung cancer, but can only partially relieve certain clinical symptoms. White-flowered Snake Tongue Herb is slightly bitter and sweet in taste, slightly cold in nature, belonging to stomach, large intestine and small intestine meridian, with the effect of clearing heat and removing toxins (clearing heat and toxicity in the body), eliminating carbuncle, dispersing knots, inducing water retention and eliminating edema (facilitating urination and eliminating oedema), which is used for treating sore throat, damp-heat and yellowish jaundice, venomous snakebite, sores and hot carbuncle, etc. This medicine is avoided by those who are in yin gangrene (a kind of slow-acting yin sores and ulcers disease) and spleen and stomach deficiency and coldness (spleen and stomach weakness and coldness). Sempervirens is pungent, bitter, cold in nature, belonging to lung, liver and kidney meridian, it has the effect of clearing heat and removing toxins, removing blood stasis and inducing diuresis, and it can be used to treat furuncle (mostly occurring in the limbs or facial sores, with the shape of small root base deep, as hard as nails), swollen and poisonous, sore throat, bruises, edema, jaundice, snake and insect bites and other diseases, and it is cautioned to be taken by the deficient body and the pregnant women. The two drugs do not have the efficacy of treating lung cancer, but these two drugs may be added into some formulas for treating lung cancer to assist in achieving the effect of clearing heat and detoxifying and dispersing nodules. It is recommended to treat the disease under doctor’s guidance and take the medicine according to the doctor’s prescription, not to use the medicine on one’s own.