Ginger

Ginger is an important herb in both western and eastern herbal medicine traditions. It is also widely used in culinary applications. Ginger has been used for a variety of therapeutic purposes, but most recently has been shown to be effective in motion sickness and reducing nausea. Clinical trials in both children and adults have shown ginger to be effective in reducing symptoms of nausea and vomiting in patients undergoing cancer treatment.

In these studies patients consuming between 500 mg and 2,000 mg per day had less episodes and reduced intense symptoms of nausea and vomiting, and used less of their on-demand anti-emetic medications. Ginger can be consumed either through the diet (e.g. tea/tisane) or through capsules.

References:

Pillai, A. K., Sharma, K. K., Gupta, Y. K., & Bakhshi, S. (2011). Anti-Emetic Effect of Ginger Powder Versus Placebo as an Add-On Therapy in Children and Young Adults Receiving High Emetogenic Chemotherapy. Pediatric Blood and Cancer, (September 2010), 234–238. doi:10.1002/pbc
Ryan, C. H. J. K. J. T. H. and G. R. M. P. J. F. S. R. D. J. L. (n.d.). Ginger for chemotherapy-related nausea in cancer patients: A URCC CCOP randomized, double-blind, placebo-controlled clinical trial of 644 cancer patients. Retrieved April 24, 2012, from