If the expiration date on a bottle of Naproxen is 8/08, when does the drug expire?

The expiration date provided as 8/08 indicates that the lot of Naproxen is valid until the end of the specified month, which in this case is August 2008. Expiration dates on medications are generally set to the last day of the month stated on the label. Therefore, for Naproxen with an expiration date of 8/08, it would remain effective and safe for use until August 31, 2008. After this date, the manufacturer cannot guarantee the safety and efficacy of the drug, which is why it is deemed expired after the last day of that month. This understanding is crucial for proper medication use and patient safety.