Medication! There are excellent medications to prevent chemo-related nausea and vomiting. Ondansetron (zofran) and aprepitant (emend) are two of the strongest. Ativan (lorazepam) and Dexamethasone are commonly added. Different things work for different people, and we can almost always find a combination that works for everyone. This is a good review article: http://www.Mayoclinic.Com/health/cancer/ca00030.
Nausea treatment. Prevention is the best. Be proactive, and dont wait until you start vomiting. There are many wonderful treatment available to help nausea- eg- ondansetron ( for acute emesis) , emend for delayed emesis), also other medication such as Decadron ( really good for nausea), compazine, (prochlorperazine) kytril. For anticipatory nausea- Ativan works very well. Combination likely be needed. Discuss with your oncologist.