Tiannanxing can be used externally to treat snake venom, but it is not commonly used nowadays and needs to be used under the supervision of a physician. The effects of Tiannanxing are expelling wind and relieving spasm (treating symptoms such as spasm by dispersing wind), and resolving phlegm and dispersing knots. Tiannanxing, bitter, pungent and warm in nature, belongs to the lung, liver and spleen meridians. It is used in the treatment of persistent phlegm and cough, wind-phlegm and dizziness, phlegm and congestion in stroke, aphthous staring, hemiplegia (inability to move a limb at will), epilepsy, convulsions (a pediatric disease mainly manifested by dizziness, convulsions, and convulsions), and tetanus. Externally, it is used to treat carbuncles, snake and insect bites, so Tiannanxing should be used externally to treat snake venom. It should be noted that pregnant women should use this drug with caution; raw products should be used internally with caution. If you are bitten by a snake, it is recommended that you go to the hospital in time to be treated under the guidance of a physician so as not to delay your condition.