The kitchen and the bathroom are areas of the house with the greatest changes in temperature and humidity, so they are not the best places to keep your medicine cabinet. The best place is somewhere cool, dry and dark, to avoid altering the characteristics and properties of the medicines concerned.
The cabinet should also be out of the reach of children; but do not keep it locked – it should be easy to open when needed.
Make sure that anyone who needs the medicine cabinet knows exactly where it is kept.