There is no expiration date on Hyland's 4 Kids Cold'n Cough syrup. In the U.S., the FDA has exempted homeopathic manufacturers from putting expiration dates on their product labels.

How do I know when my hylands expires?

Every product has an expiration date printed or imprinted on the outer and inner package. It is usually a 7-digit alphanumerical number starting with EXP followed by 4 digits referring to the month and year that the product expires.

Does hylands medicine expire?

Hyland's says this about their expiration dates: "Homeopathic medicines are good indefinitely as they are very stable when stored under normal conditions (away from moisture and excessive heat or cold). ... This particular homeopathic seasonal allergy medicine doesn't have an expiration date on it.