I'm no whiz with the new features, but I just tried "Alexa remember that I took my medication at 8 AM this morning". Then I asked, "Alexa when did I take my medication?" Alexa responded, "You told me that I took took my medication at 8 AM this morning". I think you could refine it more and say more specifics like "I took my aspirin 81 milligrams at 8 AM on May 18th.