Can motrin and dhea be combined?

Yes.... Although technically there is no direct contraindication to these being taken together, dhea is a controversial medication. Dhea is indicated only in extremely rare circumstances - such s premature ovarian failure coupled with adrenal insufficiency (both rare conditions...Combination is even more rare).
Motrin/DHEA. I know of no studies available that say one way or another. I do have some patients that take both and they have done fine. As with anything, taking large amounts of either one is not a good thing.