I used to drink coke when I had headaches (migraine) because I had discovered that it did help. When I later learned that it is due to the coffeine I first switched to ASS and then to pure coffein pills (as that is what has the main effect). Interestingly the coffein pills don't really make me jittery or unusually awake.
This is the public group instrumental rationality diary for December 16-31.
Thanks to cata for starting the Group Rationality Diary posts, and to commenters for participating.
Immediate past diary: December 1-15
Rationality diaries archive