I oughtn't to drink it. It makes me acid.
4 seconds sound clip from the The Third Man (1949) movie soundboard.
You can hear this line at 00:40:19.592 in the Blu-ray version of the movie.
Quote context
[...]
- It was so terribly stupid for a man like Harry to be killed in an ordinary street accident.
- I oughtn't to drink it. It makes me acid.
- What man would you be referring to?
- I was told that a third man helped you and Kurtz carry the body.
- Oh, I don't know how you got that idea.
- You'll find all about it in the police report.
- There was just the two of us. Me and the Baron.
[...]