Are there pharmacy drugs that take horniness away from men?

I hear saltpeter is the thing. Don't know where to get it. Amazon? Although that seems to be a myth. Potassium nitrate is a food preservative.

 

the military (of nearly every nation) has used saltpeter (added to the water supply) to lower libido for centuries. (no idea how healthy this is)
the real problem (unless you have psychological addiction to actual sex) is the ratio of human fertility to human longevity, which results in population increase, which multiplies everything else we do wrong for the environment, which matters because, like every other species, whom we're crowding out, as well as unintentionally poisoning, we likewise ultimately depend upon.