How many grams of Cynanchum sativum should be used at one time

Fried Cang Er Zi is the artillery product of Chinese medicine Cang Er Zi, which is poisonous, and the dosage is 3-10g at one time.
Cang Er Zi is the dry mature fruit with involucre of Cang Er, family Asteraceae, take clean Cang Er Zi, according to the method of stir-frying (Tong Zi 0213), stir-fry until yellow-brown, remove the thorns, sieve, that is, stir-fry Cang Er Zi.
Fried Cang Er Zi taste pungent, bitter, warm, poisonous, belonging to the lung meridian, has the effect of dispersing wind-cold, through the nose, dispel wind-dampness. Cang Er Zi can be used for the treatment of wind-cold headache, nasal congestion, nasal congestion, nasal abyss (mainly manifested as obscene nasal mucus, the amount of wiping unclean), rubella itching, dampness paralysis contracture, and so on.
The dosage is 3-10 g. The adverse reactions and contraindications are not clear. If you need to use this drug, please under the guidance of a professional physician to identify the evidence, do not self-medication, so as not to affect the health of the body.