Antispasmodic San is a Chinese herbal formula with a standardized formula of whole scorpion and centipede. Antispasmodic San is from “Epidemic B Encephalitis Chinese Medicine Treatment”, the whole scorpion and centipede have the effect of attacking toxins and dispersing knots, clearing collaterals and relieving pain (dredging the meridians and collaterals, relieving pain), resting wind and suppressing spasms, and the two Chinese medicines are prepared into Antispasmodic San after compounding and the therapeutic effect is more significant. Antispasmodic San clinically treats B brain convulsions, convulsions, limb convulsions, as well as migraine, intractable headache, arthralgia and so on. Antispasmodic powder composition is special, scorpion, centipede poisonous, the dosage should not be too large, pregnant women are prohibited. Although antispasmodic powder has significant wind spasm and pain relief effect, but the composition of special, should be strictly in accordance with medical advice to take.