One time, I had a bad experience with vodka; I drank a very excessive amount in one night.
As a result, I can no longer drink vodka or even smell it with out getting queasy / sick. This was several years ago.
Now, if I want to have any type of spirits, I can only have a small amount and I need lots of mixer (Coca-Cola, Lemonade etc.). If I drink it straight, I throw up.
Some of my friends have had the same happen to them with a variety of different spirits. They also cannot stand that type of spirits anymore and get sick if they drink it.
What is this phenomenon called?
Why does this happen?
Is there a "cure" or "fix"?