What expires in expired medicines, and what survives.

I have always wondered and felt jealous that other systems of medicines do not have expiry dates on their medicines, why should only Allopathy system have them.

With the present trend of such interruption in the electrical circuit, and the hefty amount of medicines in the racks, due to the turn over, would it be possible to maintain what needs to be maintained.

There was a time when i used to add ice cubes to the thermos flasks that contained some medicines, not knowing any thing then nor knowing any thing now.

So coming to the title of this sharing, what is it that has brought on the term expiry date to the medicine, and what expires, and what remains.

Maybe with some interactions , things could get understood.