effective for pregnancy-induced, postoperative , and motion sickness nausea and vomiting. Stomachic property Powdered Ginger, which contain not less than 1.8 percent of volatile oil (ml/100g), and not less than 0.8 percent of the sum of gingerols, gingerdiones, but not more than 0.18 percent of shogaols.and it meet with the standard of USP. Ginger Capsules