If your medicine cabinet has seen better days, or you would like to add one where there is only a mirror, there are a few options available to you. It is easy to find prebuilt medicine cabinets at any home improvement store, so this article will focus on installing these. If you are building your own medicine cabinet, these tips will still help you get it installed the right way once construction is complete. 1. Replacing an old medicine cabinet. This will requite a little measuring on yo