Advil, The Antiandrogen?

It turns out that ibuprofen has anti-androgenic effects. This paper from the Proceedings of the National Academy of Sciences of the United States of America is fairly dense reading, and I'm probably not going to get the rest of the way through it, but the upshot appears to be that ibuprofen may be one of the causes of declining male fertility, and it definitely interferes with hormone production in adult males.

http://www.pnas.org/content/early/2018/01/03/1715035115.full...

A word of warning on ibuprofen. It can elevate blood pressure and mess with livers, so it's nothing to be used regularly as an intentional anti-androgen. However, when you have a headache, or sore back, and are going to take something anyway, maybe this new scientific news will influence your analgesic choice.