biochemistry - What chemicals could be added to human urine to cause harmful chemicals to precipite out?

What chemicals could be added to human urine to render it drinkable with no harmful side effects?

Urine is salty and contains other dissolved solids. Thus, drinking untreated urine would result in osmotic pressure actually removing water from the body.

So, what chemicals would be needed to cause the salts and other dissolved solids to precipite out or otherwise be rendered harmless?

I am thinking about a tablet, capsule or drops that would render human urine drinkable within 5 minutes or so.