Can you take sleeping aids 5 years after expiration date?

You can do what you want, but I would not recommend it. Medication has an expiration date for a reason. Most of the time, it means the medication just will be not as effective, but sometimes it can be harmful. Recommend you consult with a pharmacist about your specific situation.

No! medication is not everlasting, the expiry date is a quality issue, it may be possible for SOME medications to still be usefull SHORTLY after the expiration date, if kept in ideal conditions, however this rarely is the case, heat, light, humidity all work to deterorate the efectiveness of most medications, which is what the expiry date was designed for. So it is best not to use it.