Motion sickness occurs when the body is subjected to accelerations of movement in different directions or under conditions where visual contact with the actual outside horizon is lost. The balance center of the inner ear then sends information to the brain that conflicts with the visual clues of apparently standing still in the interior cabin of a ship or airplane. Source: Health Link

The initial symptoms of motion sickness vary from person to person. These symptoms range from dizziness to vomiting or cold sweats.

Motion sickness can begin before you depart on your trip, and while 1-2 tablets of antihistamine (antihistamines) can help, nothing is guaranteed to fully stop the effects of motion sickness in everyone. Here are some tips to help you cope with travel and overcome the effects of motion sickness. Over-the-counter medications Dramamine or Bonine can be very effective for short trips or when symptoms occur intermittently.

• Always sit facing forward. Don't face backward in your seat or sit in a seat that faces backward. Sitting forward helps keep the motion sensed by your eyes and ears the same.
• Whatever you're riding in, find the place with the least amount of movement. This means sitting closer to the center of a plane (in the aisle seats over the wings) or in the middle of a boat - rather than at the sides or the front, where you're more likely to feel seasick.
• Try to take your mind off how bad you feel and focus on something else. Remember, the first step to controlling motion sickness is to realize what is wrong with you and deal with that, not concentrate on how sick you may be feeling.