Insurance:
A travel insurance policy that covers theft, loss and medical treatment is recommended. Make sure the insurance also covers the activities that you will be undertaking during your stay in Nepal such as trekking, rafting and  all adventures activates

Immunization:
Visitors do not need any particular immunization for visit. Vaccinations for cholera, meningitis, tetanus and diphtheria, typhoid and gamma globulin should, however, be considered. It may be a good idea to get a complete check-up before departure.

Medical Kit:
A simple but adequate medical kit can be very useful while traveling. The following items are recommended: Aspirin or Panadol - for pain or fever; Antihistamine - as a decongestant for colds, allergies and to help prevent motion sickness; Antibiotics - useful if traveling off beaten track but they must be prescribed; Kaolin preparation (Pepto-Bismol), Imodium or Lomotil - for stomach upsets; Rehydration mixture - for treatment of severe diarrhoea; Antiseptic, mercurochrome and antibiotic powder or similar 'dry' spray - for cuts and grazes.

Other things to be included are:
Calamine lotion to ease irritation from bites or stings, bandages and band aids for minor injuries, scissors, tweezers, thermometer, insect repellent, sun block lotion, chopsticks, water-purification tablets, throat lozenges (Strepsils), moleskin, Sulamyd 10% eye drops, Acetaminophen (Paracetamol, Antacid tablets).

General Knowledge:
 It would be hard to know all aspects of Nepal's health problems. However, it would be useful to gather information on altitude sickness (AMS), diarrhoea, giardia, dysentery, cholera, hepatitis rabies, typhoid, tetanus, meningitis diphtheria, malaria and HIV/AIDS Common sense can often save lives.

Prevention, the Best Medicine:
Stomach upsets are the most likely travel health problem but the majority of these cases are minor problems. Thoroughly cooked food is the safest but not if it has been left to cool. One should be careful about what one eats and drinks. The number one rule is not to drink tap water or other water from open sources. Reputable brands of bottled water or soft drinks are available. While drinking and eating it is important to make sure that water which may be unsafe has not been added.

Do not drink unpasteurized milk. Boiled milk is fine if it is kept hygienically and yoghurt is usually good. Tea or coffee should also be all right since the water would have been boiled. Salads and fruit should be washed with purified water or peeled where possible. Food, drink and snack from reputable sources are usually safe. However beware of food that has been kept out in the open for long.
Water
Running and tap water is not drinkable in Nepal.  Additionally, the ongoing use of plastic bottles is causing harmful environmental pollution to the beautiful mountain environment.  The solution is to sterilize existing water supplies prior to consuming.  There are a number of ways to do this, the two main options being:

Boil all water prior to consuming.  This is well known to kill all harmful bacteria and is the method by which Himalayan Glacier seeks to provide to trekkers using the facilities of the guest and teahouses.

Alternatively, using an Iodine solution - either tablets or drops.  This is known to kill most water borne bacteria (not 100%) and has been used widely by most trekkers effectively in this region.  Iodine is particularly handy when not near or in a lodge and additional water is required to be purified.
Wash your hands frequently, as it is quite easy to contaminate your own food. You should clean your teeth with purified water rather than straight from the tap. Avoid climatic extremes: keep out of the sun when it is hot, dress warmly when it is cold. Avoid potential diseases by dressing sensibly. Do not walk bare feet as it is easy to get worm infections through bare feet. Try to avoid insect bites by covering bare skin when insects are around, by screening windows or by using, insect repellents.