Not a direct answer but hope it helps:
http://www.bbc.co.uk/health/conditions/travels ickness1.shtml
http://www.nhsdirect.nhs.uk/articles/article.a spx?articleId=671
This is for "morning sickness" but may still be useful:
Treatments for normal nausea and vomiting
Treatments that work
* Ginger: This root is used to flavour foods, but it's also a natural remedy for nausea and vomiting. More...
Treatments that are likely to work
* Acupressure: To relieve nausea and vomiting, pressure is applied to a point on your forearm, either using fingers or a wristband. More...
* Vitamin B-6: This is vitamin is found in many foods, including chicken, fish, pork, whole grains, nuts and vegetables. To help with nausea, you might try taking a B-6 supplement. More...
* Antihistamine tablets: These drugs are normally used to treat allergies. Doctors sometimes use an antihistamine called promethazine (brand name Phenergan) to treat nausea and vomiting in pregnancy. More...
Treatments that need further study
* Acupuncture: A practitioner inserts thin needles into your skin at specific points on your body. More...
* Changing your eating habits: If certain foods trigger your nausea, changing what you eat may help. More...
* Phenothiazines: These types of drugs are used to treat many problems. Your doctor may give you one of these drugs, prochlorperazine (brand name Stemetil) if your nausea and vomiting is severe. More...
http://www.besttreatments.co.uk/btuk/condition s/17143.html