If your bupropion came in a prescription bottle from a pharmacy,there should be a discard date on the bottle, telling you how longyour medication is good until. This date is at most a year afteryou bought your prescription, though it may be shortdated. The"discard after" date is usually located in smaller letters aroundthe "refill" information.If your prescription came in what is called a "stock bottle",the expiration date is always next to the lot number, usuallylocated on the far side of the label.