And While We're Talking About Things That Are Borderline Offensive...

Here
is a link that discusses the use of caffeine suppositories during Yom Kippur, which involves a 25-hour fast. Apparently, a suppository does not break the fast, but will still keep you energized and alert during your prayer.
...
What.
This seems like a pretty solid example of what happens when ancient religion clashes with modern-day standards and technology. As the article states, "These guys love a good loophole."

EDIT:
Oh my goodness, it's everywhere.