Is It Safe To Take Expired Medicine?

 There are a few factors that determine whether or not it’s okay to take medication past its expiration date. The type of drug, how much time has passed beyond the date and how the medicine has been stored all matter. If you are using something that was a few months or a year after the expiration date, and it had been stored well, for most drugs I don’t think you have a problem. 

https://www.buzzfeed.com/maximmaider/is-it-safe-to-take-expired-medicine-3be9o

FDA study gets to the heart of medicine expiration and safety

With a splitting headache, you reach into your medicine cabinet for some aspirin only to find the stamped expiration date on the medicine bottle is more than a year out of date. So, does medicine expire? Do you take it or don't you? If you decide to take the aspirin, will it be a fatal mistake or will you simply continue to suffer from the headache?
This is a dilemma many people face in some way or another. A column published in Psychopharmacology Today offers some advice.
It turns out that the expiration date on a drug does stand for something, but probably not what you think it does. Since a law was passed in 1979, drug manufacturers are required to stamp an expiration date on their products. This is the date at which the manufacturer can still guarantee the full potency and safety of the drug.

https://www.health.harvard.edu/staying-healthy/drug-expiration-dates-do-they-mean-anything