Medical Editor: Jay W. Marks, MD. A couple of years ago an episode of the popular TV series Grey's Anatomy featured a woman with two uteruses (or uteri). This unusual condition does, in fact, occur as a result of abnormal fetal development.
Currently, EpiPens expire 18 months from date of manufacturing. Facing criticism for the drug's rapidly rising price, Bresch said the company hopes the expiration date can be extended to a minimum of 24 months.
Most of the whitening products we use in our office have a shelf life of 18 months. Once the whitening strips expire, they will not cause any harm to your teeth, but their whitening effectiveness may be reduced or even completely eliminated. For best results, use your whitening strips BEFORE they expire.