Ginger consists of the peeled, finger-long, fresh or dried rhizome of Zingiber officinale Roscoe [Fam. Zingiberaceae].
The rhizome contains essential oil, principally the sesquiterpene hydrocarbons zingiberene and bisabolene, and pungent principles (gingerols and shogaols).
Daily dosage: 2g. to 4g. rhizome; equivalent preparations.
As an antiemetic: Single dose of powdered rhizome: 1g. to 2g.
Duration of administration: No restriction.