Before taking a trip, it is advisable to go to your family doctor, which will inform you about some general preventive measures. And on the other hand, if you have any specific disease, will inform you if it is necessary to make any revision or in the case of needing some medication will prescribe this in the amount you need.
The doctor will also inform you of any vaccination or other preventive measure is especially necessary. So go with enough time in advance, at least 4 weeks.