Since long distance travel in this day is almost always by air, the traveler must be prepared for the effects of jet lag due to disturbance in circadian body rhythm. The overage traveler requires about 1 day to readjust for 1 or 2 hours of time change mild sedatives may be required to assist sleeping on the first might or 2 after arrival at the destination. Motion sickness may be prevented by such agent as bonine. Moderation in the intake of alcoholic and carbonated beverages and the avoidance of excessive food intake lead to more comfortable trip, prolonged sitting should be avoided since this can lead to postural hypertension, abdominal distension, if flying is necessary with a cold, nasal decongestants should be used.
Going to high attitudes requires time for acclimatization and it is best to avoid alcoholic beverages, tobacco, excessive food and exercise and to take more frequent rests for the first few days at attitude. Similar adaptations and restriction are necessary on arrival into a tropical area.
A great hazard to the traveler to the developing countries is contaminated water. Unless it is absolutely certain that piped water is potable and safe bottled water should be used for drinking purpose alcoholic beverage, hot tea and coffee and hot milk are safe drinks.
Sunstroke and heat exhaustion can be avoided by abstaining from prolonged exposure to the sun or overly strenuous exercises. Its important to drink more fluid and to add salt to food or to use salt tablets, effective sunscreen should be used since insects are important carries of diseases and as well a great nuisance mosquito exposure may be lessened by wearing clothing that covers the arms and legs and applying mosquito or insect repellent a to exposed areas.
