Motion sickness affects millions of traveling Americans each year, whether they're in planes, ships or cars.

Some advice for reducing the chances of developing motion sickness comes from Harold Silverman, a clinical pharmacologist and author of several consumer health books:- In an airplane, try to get a seat over the wings. On a ship, try to stay on deck as close to the middle of the ship as possible and don't focus on the motion of the waves. In a bus or car, try to sit in the front and focus your gaze straight ahead.

- Avoid reading during the trip.

- Lie down or recline whenever possible.

- Maintain proper ventilation.

- Avoid heavy meals and alcohol.

- Take a motion sickness remedy a half-hour before travel and every 4 to 6 hours during travel.