Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Data sources include IBM Watson Micromedex (updated 1 May 2019), Cerner Multum™ (updated 2 May 2019), Wolters Kluwer™ (updated 1 May 2019) and others.. Once a drug has past its expiry date the manufacturer can no longer guarantee its safety or efficacy. You are best to throw them away and ask your doctor for new prescriptions. You are best to throw them away and ask your doctor for new prescriptions.. Expiry dates are the source of a lot of questions to pharmacists. Not only is the pharmacy legally responsible for ensuring your prescription is filled with “in-date” stock, we’re regularly confronted with dealing with expired drugs. Because of expiry dates, an enormous quantity of drugs are manufactured and sold or dispensed, but never consumed. This creates a significant wastage issue .