The expiration date is the final day that the manufacturer guarantees the full potency and safety of a medication. Drug expiration dates exist on most medication labels, including prescription, over-the-counter (OTC), and dietary (herbal) supplements. U.S. pharmaceutical manufacturers are required by law to place expiration dates on prescription products prior to marketing.
After the expiration date, the efficacy of the medication can't be guaranteed by the manufacturer. The medicine may not work as well, and in rare cases, it may be harmful. While most drugs do not become dangerous after their expiration date, there are exceptions like insulin, nitroglycerin, and liquid antibiotics.
Please consult a healthcare professional if you have expired medications. Don't take expired medications without professional advice. It's also a good practice to regularly check your medicine cabinet and properly dispose of expired medications.