The heart attack thread got me thinking about the advantages of carrying a first aid kit on long rides. I never have carried one and I've only considered it briefly. Maybe it is a good idea.
What to bring?
Ibuprofen - for pain and inflammation
Aspirin - for pain and inflammation and blood thinning, as mentioned in the other thread
a few bandaids
1 large gauze pad (3x3 inches?)
a bit of tape
That wouldn't take up much space in a seat bag and the weight is minor.
What else should be carried?