Leave a copy of your medical and dental records with your family or other contact person.

If you live at a low altitude and travel to one that is higher by more than 5.000 feet, you can expect to take 10 to 14 days to adjust to an altitude change. You may tire easily, so reduce physical activity until you become accustomed. Avoid alcohol as it will have more pronounced effects... Altitude sickness symptoms include headache, nausea, fatigue, shortness of breath, and insomnia. Altitude sickness is generally cured by descending to a lower altitude, and if needed, take oxygen. Severe cases can become life threatening. At the fist signs of fatigue, take a break.

Some travellers like to tell their ailing shipmates "it's all in your mind"... If you are prone to motion sickness, you will already know that no one is immune to motion sickness no matter how strong their intestinal fortitude... Given strong enough stimulus, everyone with a normal sense of balance will succumb. The process by which motion sickness occurs centres on the function of the inner ear, an organ that helps us keep our balance... Thankfully, modern cruise ships are equipped with stabilizers to minimize that rolling motion, and most avoid stormy seasons in various regions.

Generally, the first symptom is unusual paleness of the skin. This may be followed by yawning, restlessness, and a cold sweat. As the symptoms progress, malaise and drowsiness may set in, sometimes accompanied by a slightly upset stomach, or "gastric awareness." Then follows excessive salivation, nausea, and vomiting... Vomiting brings relief, if only for a short time. While motion sickness can ruin one's pride, one's suit, or an entire vacation, it seldom causes severe health complications. In extreme cases, though, prolonged vomiting can cause severe headache, prostration, dehydration, and disturbed mineral balance.

Prevention is easier that treating motion sickness once it has begun.

• In a car, sit in the front seat, looking ahead.
• In an airplane, choose a seat over the wing.
• On a ship, remain amidships (preferably on deck), rather than below.
• Lie on your back, in a semi reclined position, and keep your head as still as possible.
• Look ahead, at the distant horizon. If that's not possible, it may be better to close your eyes rather than focus on fast-moving scenery or waves. Focus attention on something other than the motion of the vehicle.
• Overindulgence in food or drink can predispose you to nausea and promote the onset of other motion-sickness symptoms.
• Tobacco smoke and other odours, particularly from food, should be avoided.

TD, as it is known, affects 20% to 50% of travellers. In addition to frequent bowel evacuations, its symptoms include abdominal cramps, nausea, bloating, fever, and feeling lousy.

• Low-risk areas include Canada, northern Europe, Australia, and New Zealand.
• Intermediate-risk areas include southern Europe and a few Caribbean islands.
• High-risk areas include most of the developing countries of Latin America, Africa, the Middle East, Asia, and USSR.

Before leaving home, do not take any antibiotics as preventive measures, since they can foster the growth of antibiotic-resistant bacteria in your body.

Never drink tap water or any drink with ice in it in high risk countries.

Avoiding diarrhoea
To avoid diarrhoea and other internal distresses common to travellers, stay away from fresh vegetable salads, (outside of the low risk countries previously mentioned), which can't be disinfected, and food that has been left out in the sun. In certain countries--but not all--you must never drink tap water or any drink with ice in it. Boil the water before drinking it or using it--even to brush your teeth. Better yet, stick to bottled water. Avoid uncooked vegetables, unpasteurised milk and milk products such as cheese, and eat only cooked food that is still hot, or fruit that you have peeled.

Avoid undercooked and raw meat, fish, and shellfish. Safe beverages include bottled carbonated beverages (especially flavoured beverages), beer, wine, hot coffee or tea, or water boiled or properly treated water. The eating place is important with private homes, restaurants, and street vendors listed in order of increasing risk.

If you get traveller's diarrhoea
--one or two unformed stools within eight hours accompanied by cramps, nausea, and malaise... do not however, succumb to the temptation to immediately swallow some medicine to stop it... Most cases of TD are usually short-term. You will need to replace fluids and salts lost. To treat, prepare one glass (8 oz.) of juice and one of water. Drink alternately from each until thirst is quenched.

• The first glass should contain orange, apple, or other fruit juice with 1/2 teaspoon of honey or corn syrup plus a pinch of salt.
• The second glass should contain boiled or carbonated water and 1/4 teaspoon of baking soda.

Consult a physician, rather than attempt self-medication, if the TD is severe or does not lessen within several days... if there is blood or mucus in the stool... if fever occurs with shaking chills... or if there is dehydration with persistent diarrhoea

Travel-specific insurance policies written by major insurers are available through Holidays Allover to cover doctors visits, hospitalisation, and outpatient care costs while in Australia. Air ambulance coverage is a plus in case you need medical assistance to return home from overseas. For a 2-week stay, you'll pay from approximately AU$100 for a single person to AU$220 for a family. Be sure to check maximum payout's, age restrictions, and which services aren't covered.