Why does my Bayer aspirin smell like vinegar?

If your Bayer aspirin smells like vinegar, it is likely due to the degradation of the acetylsalicylic acid in the aspirin, which can produce acetic acid, the main component of vinegar. This can occur if the aspirin has been improperly stored, exposed to moisture, or has passed its expiration date. It's advisable not to consume the aspirin if it has an unusual smell, as it may indicate that the medication has deteriorated. Always check expiration dates and storage conditions to ensure the effectiveness and safety of your medication.