About ten years ago I had an incident, where I only drank one glass of gin but was incredibly ill. This has now happened about five times.
I have literally ONE drink.
I wake up several hours later with an absolutely crushing headache.
I get up and take some painkillers.
About an hour later I am vomiting so hard that I practically bring up yesterday's dinner.
This lasts about four or five hours. I then go back to bed and wake up feeling absolutely fine.
It happens about once every two years, and isn't linked to any one type of alcohol. The circumstances are always different (ie, I'm not always dehydrated/tired/overworked or already ill).
So what the hell is it?