Drugs in pee in drinking water is not new.
Among the various Siberian peoples who use Amanita muscaria as a cultural norm, there exists a curious practice whereby the urine of one who has consumed the mushroom is drunk by another who consequently becomes inebriated. The urine of this person may then be drunk by another and so on, the procedure being repeated up to five or six times. The reason for this practice is that A. muscaria contains ibotenic acid which, when the carboxyl radical is removed from the molecule, yields the psychoactive molecule muscimole [Ott, p. 327]. The metabolic process of decarboxylation which effects this transformation within the user's liver is very inefficient. In fact, it is so inefficient that approximately 85% of the ibotenic acid ingested (more than enough to inebriate further users) passes through the body unchanged and is excreted in the urine [Ott, p. 328]. To put it another way, the urine contains more than five times as much of the drug as the body can assimilate.
Squats to Pee...That's for Me!