My best guess is that the effects will also vary by person. .
And a very good guess I might add.
For example for sildenafil, data comparisons between Middle Eastern and other ethnicities indicated that Iranian, Mexican, and Thai would potentially have
twice the effect observed in Arabs and Caucasians, considering the same prescribed drug formulation and dose.
I do see something similar on interactions with coffee and NSAID. I read online that the pain relievers could be more effective taken with caffeine and personal use with coffee seems to be consistent.
Yup, which is why I pick up a McD's senior coffee on my way to Flushing. Cute manager there even recognizes me as I'm there every Sunday am, and my coffee is ready just as she dumps my exact change w/o counting it into register. (97
¢ and IMHO better than Dunkin — in fact I switched my pour over home brew from Gevalia to McCafe medium roast that I found at some market)