This started as an exercise post, but I think this topic may be useful for anyone with not only exercise, but also for anyone who is working hard outside in the hot weather. And also for parents choosing between Advil or Tylenol for their children.
I will start with the exercise part and then move on to the other stuff, hang with it…
For exercise
For a shorter run, I think either Advil or Tylenol are fine. I don’t take either one very much, but if I am sore and I have a hard run on the plate, I will take Advil before a short run.
But for long runs or long periods of exercise, Tylenol is better!
Advil (Ibuprofen) can block certain prostaglandins - which are hormones that help dilate the blood vessels that lead to the kidneys. Blocking prostaglandins can cause a decreased blood flow to the kidneys, which is not a good thing to do during a long run when you may become dehydrated!
Tylenol (Acetaminophen) is metabolized almost totally by the liver, so your kidneys are not affected by it.
So a general rule for long runs or long periods of exercise (or any hard work where you may become dehydrated) - if you need a pain reliever, take Tylenol (Acetaminophen) instead of Advil (Ibuprofen).
Once you have re-hydrated after your exercise, Advil is fine.
For parents
As a great example of how sports science plays so importantly with other real-world issues, related to the same thing with dehydration, here is a guideline for parents giving pain relievers to their children…
Dehydration plays an important role in triggering renal damage by NSAIDs. Indeed, ibuprofen (Advil) should not be given to children with profuse diarrhea and vomiting, with or without fever.
Working Towards an Appropriate Use of Ibuprofen in Children: An Evidence-Based Appraisal - PMC
I know the option sucks there, because Tylenol is the one that causes issues with the G5 (but not the G6), so if you switch to Tylenol you have a different potential issue…
Taking medications with acetaminophen (such as Tylenol) while wearing the sensor may falsely raise your sensor glucose readings.
CGM Safety Information | Dexcom | Dexcom
@LarissaW, I think you have some info to add having to do with the effect on the heart also, right?