There are plenty of things you should keep in your medicine cabinet but the most important things include a first aid kit with sealed bandages and band-aids in case of injury, medicines sealed in plastic pots, and a hot/cold pack. These are all items that are essential to be able to find and grab in a pinch, especially in the case of an emergency or accident. Ideally a medicine cabinet should be somewhere cool and dry, such as within a pantry or mudroom, locked safely so that children cannot access it.