Topical Anaesthetic
I had this weird rash, some kind of itching, not a bad thing. So I put some calamine lotion on it, you know the "pink stuff" that's NOT Pepto Bismol, and being a topical anaesthetic, it helped. But the really weird thing is just after I did that, I was about to write something as part of this monologue I'm working on covering a wide variety of topics and suddenly...I couldn't think of any topics. It was like I was topic-less. I think the calamine lotion had something to do with it. When the itching came back, I could go back to my monologue writing. Except, the itching was driving me crazy, so when I put calamine lotion on, again ... away with the topics.
Then I tried an experiment. I put calamine lotion all over my head, my scalp. I wound up completely blacking out. I woke up on the bathroom floor with my hair all pink. Luckily, the bottle had spilled all over the floor and, lo and behold, my rash went away. I'm never using that pink stuff again...no way.