For example, poly-histine cs, if im suffering from same cold like symptoms as time when dr prescribed this medication? Its been at least 3 or more yrs since then and i dont have medical insurance. I really cant afford that kinda of expense, especially if the doc is gonna just tell me what i already know... Im sick! I strangely enough have an unopened bottle of the same exact medicine the doc had given to me when i was sick, but it was my mothers? its well past its expiration date, but the bottle is still sealed, so its never been opened! If someone has this knowledge out there will ya please shoot me straight and help a brother out! THANX