Today you'll sort through your medicine cabinet and any other spots in your home where you keep prescription and over-the-counter medications and look for any items that have expired.
Personally, I don’t believe that something becomes ineffective on the expiration date, but six months or a year later? I wouldn’t trust the effectiveness.
I remember my mother-in-law telling me about having an allergic reaction that she tried to halt with an antihistamine. The pill didn’t work, so she took another, and another. She ended up calling the paramedics. It turned out that the pills she’d taken had expired a couple of years earlier and she’d never thought to check the date on them before she needed them.
If you have questions about the effectiveness of recently expired medications, check with your pharmacist.
Your pharmacy (or police station) may have a receptacle for collecting expired medications. If not, avoid tossing medications down the toilet. Instead, mix with old coffee grounds or used cat litter and toss in the trash.