Since medications expire, you’ll need to maintain a first aid kit that contains them more often than a kit that doesn’t.
If they are not regularly checked and replaced, you run the risk of a drug not working properly when it’s needed.
To help you remember, get into the habit of checking the first aid kit when you replace the batteries in your smoke alarms. (A good rule of thumb? Check both twice a year.)
Or you can do it when you set your clocks back and ahead during daylight savings time.