medication is no longer effective or has become unsafe to use. Medical authorities state expired drugs are safe to take, even those that expired years ago. A rare exception to this may be tetracycline, but the report on this is controversial among researchers. read more
Drug manufacturers are required to stamp an expiration date on their products. On over-the-counter (OTC) medicines, the expiration date is often printed on the label or carton under "EXP" (see photo) or stamped without ink into the bottom of a bottle, carton, or the crimp of a tube. read more