Medicine Cabinet — What It Is, Types, and Replacement

A medicine cabinet is a wall-mounted bathroom cabinet used to store medications, toiletries, and small personal-care items near the sink.

Medicine Cabinet diagram — labeled parts, dimensions, and installation context

What It Is

A medicine cabinet combines storage with a shallow wall-hung or recessed cabinet body, often with a mirrored door on the front. It keeps frequently used bathroom items accessible without taking up countertop space.

Some medicine cabinets are surface mounted and project from the wall, while recessed cabinets fit partly inside the wall cavity for a cleaner look. Because they are installed close to sink areas, moisture resistance and secure mounting matter more than many homeowners expect.

Types

Common types include surface-mounted cabinets, recessed cabinets, mirrored cabinets, and units with integrated lighting or outlets. The best type depends on wall depth, available framing space, and bathroom layout.

Where It Is Used

Medicine cabinets are used above bathroom sinks and vanities in powder rooms, family bathrooms, and primary suites. They are often centered with the sink and paired with vanity lighting.

How to Identify One

Look for a shallow cabinet mounted on or recessed into the wall above the sink area. Loose hinges, rust, broken mirror glass, damaged shelves, and doors that no longer close squarely are common signs that the cabinet is worn out.

Replacement

Replacement is usually finish carpentry work, but recessed cabinets may require checking wall framing, plumbing, and wiring before the opening is changed. If a new cabinet is larger or deeper than the old one, patching and trim work may also be needed.

Medicine Cabinet — FAQ

What is the difference between a recessed and surface-mounted medicine cabinet?

A recessed cabinet fits partly inside the wall cavity, so it projects less into the room. A surface-mounted cabinet hangs entirely on the wall face and is easier to install when the wall cannot be opened.

Can I replace a medicine cabinet without opening the wall?

Yes if you are swapping one surface-mounted unit for another of similar size. Replacing or enlarging a recessed cabinet often means opening the wall and checking for framing, pipes, or wiring in the cavity.

How do I know if a medicine cabinet should be replaced?

Replacement is common when the mirror is damaged, the box is rusted, the shelves are broken, or the cabinet is loose at the wall. Moisture damage around the opening is another reason to replace it and inspect the surrounding finish.

Does a medicine cabinet need to be centered over the sink?

Usually yes for appearance and usability, but room layout and stud locations can affect placement. In remodel work, electricians and carpenters may need to coordinate lighting and wall support to get the cabinet where it belongs.