My girlfriend usually hiccups for between 30 seconds to 2 minutes. On the rare occasions that it doesn’t go away so quickly, she absolutely refuses to try my method. I don’t know which drives me crazier - her refusal or the fact that they generally just go away so soon.

Watch the video. He mentions the placebo effect fairly prominently. You have 40 years of evidence that it works for you, which means it’s definitely developed into a rock-solid placebo.