For anyone who might be interested, earlier today this Youtube video was suggested to me. Purely coincidental, I was not looking for anything medical and have not done so in some considerable time. The video explains the problem with ingestion of grapefruit (juice), its effects on many medicines, and highlights serious injuries and deaths. This relates to the suggestion from Jana Hill that people use grapefruit juice as a method for correcting mistakes to dosing of benzodiazepines - and extremely foolhardy approach and very dangerous suggestion to make to people who are probably not operating at their best anyway (due to side- or withdrawal-effects of benzos).
The video takes a somewhat jarring, comical, lighthearted approach to the subject, but it is an easy watch for anyone who is interested by does not have the patience for something heavy on the science.
https://www.youtube.com/watch?v=ffGx7ZISY6A