I just noticed that the pill for my refill of Omeprazole is quite a bit smaller than the version I’ve received in the past. I’m familiar with pill shape & colour being different from brand to brand but never the size.

@see_the_sus I'm with you on questioning this, as the two pills look nothing alike (especially if it didn't come with any note about a change in appearance!).
Maybe call (better yet visit if possible) your pharmacy and double check to confirm? People are human, and mistakes can happen. 🙂