If I were you I'd read the academic literature and then discuss with a GP and/or clinical pharmacist.
You may need to give them a link to research if it's recent.
I have found things are inevitably more complicated than they appear at first.
I wouldn't have guessed, for example, that grapefruit variety has such an impact on results - and also when you eat more pith/bioflavanoids (as with whole grapefruit) ...
Not as straightforward a question as it seems.
Good luck.