What is Expiry Date?

	Science of Medicine

It is the date before which the quality of a pharmaceutical remains acceptable for its intended use. It is predicted from stability tests under general / normal storage conditions or by accelerated stability testing under extreme conditions. Every package of the MSD drugs bears an expiry date.

Any harm caused by taking / using expired product?

After the expiry date, there is no guarantee the product can maintain the therapeutic efficacy. Moreover, it may cause harmful effects to the body.
eg:	using expired eye drops may
	increase the chance of getting infection to the eyes
	get unpleasant taste from expired products
	increase possibility of side effects
	prolong the treatment time