I take diphenhydramine hydrochloride on a fairly regular basis to help me sleep.
Last night, as I sat at my computer chatting with friends and browsing my feeds, I yawned and thought to myself, “Ah, yes, there it goes.”
Then, when I woke up this afternoon, I noticed that my pills were still sitting next to the computer and that I hadn’t actually taken them at all.
That’s it.
(Here’s a post about Obecalp.)