Cranberry soaked for a long time may harbor bacteria, and there is some risk of poisoning. And it should be noted that Cang Er Zi itself is poisonous. Cang Er Zi, has the efficacy of dispersing wind-cold, opening the nose, dispelling wind-dampness and relieving pain. The main treatment of wind-cold cold, nasal abyss (mainly manifested as nasal mucus obscene, the amount of wipe not clean), wind-dampness paralysis, rubella itching, scabies leprosy. Blood deficiency headache should not be taken. Overdose is easy to cause poisoning, poisoning is mainly kidney damage, causing azotemia, so that the liver congestion, fatty degeneration, liver function is sharply impaired; secondary cerebral edema, causing tonic spasms, and finally lead to death. Cynanchum must be taken under the guidance of traditional Chinese medicine practitioners, not unauthorized use of medication.